Minor progressions are a symbolic timing method in which one lunar month after birth equals one year of life. Secondary progressions use a day-for-a-year key; minor progressions use a much larger unit, about 27.32 ephemeris days, so the chart advances roughly 27 times faster. The progressed Moon completes a circuit every year; the progressed Sun moves through a sign in a little over thirteen months.
> In brief. One lunar month (about 27.32158 days) after birth equals one year of life. The progressed Moon moves about 1° per day of life, 30° per month, and 360° per year. The progressed Sun moves about 27° per year, changes sign roughly every 13.4 months, and returns to its natal degree roughly every 13.4 years. Keep orbs tight, fix the natal angles or declare a symbolic method, and check conclusions against secondary progressions and transits.
Terminology varies: some texts use "minor progressions" for secondary progressions, others for the lunar-month key. Here it means the latter. The ratio, not the label, defines the method; the same technique may be called a second type of tertiary progression or a quaternary progression elsewhere.
1. Where the method fits
A forecast rarely uses one tool. The natal chart shows potential, transits show circumstances, secondary progressions show maturing themes, a solar return shows the year's script, and minor progressions show the monthly rhythm. Secondary progressions answer "which chapter?"; minor progressions "which month?"; transits "when do circumstances combine into an event?"
The word "minor" contrasts the method with the "major" day-for-year progression; it does not mean the result is less important. If a text says "one day equals one year," it describes secondary progressions, even if it calls them minor.
2. The lunar-month-for-a-year principle
The core equation is simple: one lunar month after birth equals one year of life. For a person aged 35, the minor-progressed chart is cast not for the thirty-fifth day after birth, as in secondary progressions, but for the thirty-fifth lunar month, roughly the 956th day. Positions at that symbolic moment are the minor-progressed positions.
"Lunar month" is a family of periods: sidereal (about 27.32166 days), tropical (about 27.32158), synodic (about 29.53059), or a rounded 28 days. The first two are practically identical; the difference between 27.32 and 29.53 is enormous. Over 35 years, the 27.32-day key gives about 956 ephemeris days and the 29.53-day key about 1,033, a gap of nearly three lunar cycles. The key must be fixed and stated. The mean-rate method adds age × 27.32158 days to the birth moment; the actual-return method uses the Moon's returns to its natal degree as year boundaries. The second is more precise but slower; unless stated otherwise, assume the mean rate.
3. Calculating a minor-progressed chart
1. Verify the birth data: date, exact time, place, time zone, and historical daylight-saving transitions; convert to UT.
2. Compute the exact age in fractional years: days elapsed divided by 365.2422. For 35.5 years, use 35.5, not 35.
3. Multiply the age by the key: 35.5 × 27.32158 = 970.0 days, and add the result to the birth date and time.
4. Cast the chart for that symbolic date. The resulting positions are the minor-progressed positions.
5. Choose a house and angle policy and do not mix policies.
6. Compare with the natal chart. Meaning comes from aspects to natal planets, angles, and cusps.
Formula: progressed date = birth date + age × 27.32158 days.
Houses and angles
The key is not a whole number of days, so angles can jump if a full chart is cast. Contacts with the natal Ascendant and MC are often more important than contacts with outer planets: they show how a theme becomes visible. Do not recalculate the progressed angles naively; nodes, Chiron, and asteroids are optional.
Check: age 0 reproduces the natal chart; age 1 returns the Moon near its natal degree; age 13.37 returns the Sun near its natal degree.
4. Rates and cycles
Every body moves about 27.32 times faster in minor progressions than in secondary progressions. Saturn, which barely moves in secondary progressions, covers about a degree per year here and changes sign once or twice in a lifetime. It is still slow compared with the Moon.
| Body | Mean daily motion | Motion per year of life | Full cycle | Sign duration | Role |
|---|---|---|---|---|---|
| Moon | 13.18° | about 360° | about 1 year | about 1 month | Monthly timer |
| Sun | 0.986° | about 27° | about 13.4 years | about 13.4 months | Theme of the year |
| Mercury | 1.38° | about 38° | about 9.5 years | about 9.5 months | Communication, learning |
| Venus | 1.20° | about 33° | about 11 years | about 11 months | Relationships, values |
| Mars | 0.52° | about 14° | about 25 years | about 25 months | Action, conflict |
| Jupiter | 0.083° | about 2.3° | about 159 years | about 13 years | Growth, opportunity |
| Saturn | 0.034° | about 0.9° | about 393 years | about 33 years | Structure, responsibility |
The consequence: bodies nearly static in secondary progressions become usable timers. The Sun changes sign every 13.4 months; Mercury, Venus, and Mars cycle in 9.5–25 years; Jupiter gives one or two major shifts; Saturn changes sign once or twice. Uranus, Neptune, and Pluto remain background. Retrograde periods expand to months or years, and stations become milestones.
5. The progressed Moon
The Moon is the primary tool of the method. It moves about 1° per day of life, 30° per month, and 360° per year, passing through all twelve signs and houses in a single year. This is a natural monthly calendar.
Because the Moon completes a circuit in a year, it returns near its natal degree around each birthday. In the illustrative chart, at ages 0, 10, 20, 30, 35, 40, 50, 60, and 80 it stays between about 26° Pisces and 7° Aries, in the eighth house. A birthday-only chart can make the Moon look static; in reality it circles the zodiac between birthdays. Read it as a sequence, month by month, sign by sign, house by house.
Three levels of reading
Sign gives the emotional tone of the month, the register in which experience is felt. It changes about once a month, so it is monthly weather rather than annual climate. House gives the area of attention: work, home, relationships, study, money. Aspects give the specific triggers: what is activated and when. An aspect from the progressed Moon to a natal planet is not an event in itself; it is a moment when that planet's theme becomes emotionally charged.
The monthly house focus: first — self-image; second — money and self-worth; third — communication and study; fourth — home and family; fifth — creativity and children; sixth — work and health; seventh — partnership; eighth — shared resources and crisis; ninth — study and travel; tenth — career; eleventh — friends and plans; twelfth — withdrawal and closure. In aspect, the Moon activates the contacted planet's theme: Sun — vitality, Moon — needs, Mercury — talk, Venus — relationships, Mars — action, Jupiter — opportunity, Saturn — responsibility, Uranus — change, Neptune — inspiration, Pluto — transformation.
The Moon overtakes the Sun by about 333° per year, so their angle cycles in about thirteen months: eight phases of roughly 49 days each, from new moon to balsamic. Useful as a secondary rhythm, not a rigid schedule.
6. The progressed Sun and other planets
The Sun moves about 27° per year in minor progressions, 27 times faster than in secondary progressions. It changes sign about every 13.4 months and completes a circuit in about 13.4 years.
The Sun describes identity, will, purpose, and the way a person "shines." The natal Sun shows the potential; the progressed Sun shows which facet comes forward in a given year. The sign sets the style, the house the arena.
At about 27° per year, 1° takes 13–14 days of life and 2° about 27 days. A 1° orb lasts roughly two weeks on each side of the exact date; a 2° orb about a month. The Sun returns to its natal degree every 13.37 years, so minor solar returns occur at about 13.4, 26.7, 40.1, 53.5, 66.8, and 80.2 years.
Mercury moves about 38° per year (cycle 9.5 years); its themes are communication, learning, documents, trade, and short trips. Its retrograde lasts about 8–9 months of life. Venus moves about 33° per year (cycle 11 years); its themes are relationships, values, money, beauty, and creativity. Its retrograde lasts about 1.5 years of life, a period of reassessing values rather than a guaranteed breakup. Mars moves about 14° per year (cycle 25 years); its themes are action, will, competition, and conflict. A 1° orb lasts about 25 days, and its retrograde lasts about 2.5–3 years of life.
Jupiter moves about 2.3° per year (cycle 159 years, sign about 13 years); its themes are growth, belief, study, travel, and scale. Saturn moves about 0.9° per year (cycle 393 years, sign about 33 years); its themes are structure, responsibility, limits, and maturity. Uranus, Neptune, and Pluto move less than 0.4° per year; their aspects last for years and are generational background, not monthly timing.
Contacts with the natal Ascendant and MC are often more important than contacts with outer planets: they show how a theme becomes visible. Do not recalculate the progressed angles naively; nodes, Chiron, and asteroids are optional.
7. Aspects and orbs
The core consists of the five major aspects: conjunction (0°), opposition (180°), square (90°), trine (120°), and sextile (60°). Minor aspects — quincunx, semisextile, semisquare, sesquiquadrate — are used sparingly: the Moon moves through them quickly, and including all of them turns the calendar into a stream of "events." Keep those that repeat across planets or coincide with transits.
In minor progressions, an orb is not only a question of precision but also of duration. One degree for the Moon and one degree for Saturn represent very different spans of life.
| Body | Suggested orb | 1° of orb ≈ | Full window |
|---|---|---|---|
| Moon | 0.5–1° | 1 day of life | 1–2 days |
| Sun | 1° | 13–14 days | about a month |
| Mercury | 1° | 9–10 days | about three weeks |
| Venus | 1° | 11 days | about three weeks |
| Mars | 1° | 25 days | about 1.5–2 months |
| Jupiter | 1° | about 5.3 months | about 10–11 months |
| Saturn | 1° | about 13 months | about 2 years |
For the Moon, 0.5–1° is best: a 2° orb makes the window so wide that almost every day is "active." For the Sun and inner planets, 1° is a reasonable standard. For Jupiter and Saturn, 1° already produces long periods; for the outer planets, an orb has little meaning as "precision" because they move so slowly.
Every aspect has three moments: entering the orb (the theme begins to sound), the exact aspect (the peak), and leaving the orb (the theme fades). An event does not have to occur on the exact date; it often coincides with the entry or exit. Mark the whole window.
Progressed planet to natal planet is the primary type: the current theme meets the basic potential. Progressed-to-progressed aspects show internal integration and form quickly; contacts to the natal Ascendant and MC show how a theme enters the world.
8. Timing: building a yearly calendar
Minor progressions are useful when a "year of theme" becomes a "month of action."
1. Set the boundaries of the year. Cast two progressed charts, one for the start and one for the end; the difference is about 27.3 ephemeris days.
2. Find the theme of the year. Read the progressed Sun's sign, house, and aspects. If it changes sign or house within the year, the year has two parts.
3. Build the Moon's monthly calendar. List sign and house ingresses, exact aspects to natal planets and angles, and conjunctions. Mark five to seven key events.
4. Add the Sun's aspects (usually three to six per year), then Mercury, Venus, and Mars, which show the supporting sphere.
5. Note the Jupiter and Saturn background, then layer over secondary progressions and transits for meaningful intersections.
The funnel. Secondary progressions describe a year or several years: the chapter. Minor progressions describe a month: the paragraph. Transits describe a day or a week: the sentence. When all three point to the same theme, the chance that the person notices it rises.
The trigger. The minor Moon often switches on what slower layers have prepared. If a secondary progression highlights relationships and the minor Moon conjoins natal Venus in the seventh house that month, the theme becomes especially visible. Without that preparation, the trigger may pass unnoticed.
Stations. A progressed station can last months or years and marks a turning point in how a theme is handled. Mark it separately from aspects.
9. A worked example
The illustrative chart is set for 12 May 1988, 09:20 UT, 55°45′ N, 37°37′ E. The data are hypothetical. The natal chart has the Sun at 21°51′ Taurus in the tenth house, the Moon at 5°52′ Aries in the eighth, the Ascendant at 2°08′ Virgo, and the MC at 20°25′ Taurus.
At age 35.0 the progressed date is 24 December 1990, about 14:46 UT. The progressed Sun is 2°33′ Capricorn in the fifth house, the Moon 26°31′ Pisces in the eighth, Mercury 1°49′ Capricorn in the fifth, Venus 15°27′ Capricorn in the fifth, Mars 28°10′ Taurus in the ninth, Jupiter 12°37′ Leo in the eleventh, Saturn 24°48′ Capricorn in the fifth, Uranus 9°17′ Capricorn in the fifth, Neptune 13°50′ Capricorn in the fifth, Pluto 19°22′ Scorpio in the third. The Sun has moved from the tenth house to the fifth: from career to creativity, children, romance, and self-expression. The Moon begins in the eighth house, near its natal position, and travels through the remaining houses back to the eighth.
| Date | Event | Meaning |
|---|---|---|
| 22 May 2023 | Moon conjunct natal Moon (8th house) | Emotional reset; intimacy and shared resources |
| 1 June 2023 | Moon enters the 9th house | Focus shifts to study, travel, meaning |
| 25 June 2023 | Sun square natal Moon | Tension between outer activity and inner needs |
| 4 July 2023 | Moon conjunct natal Sun (10th house) | Visibility, career, public expression |
| 17 August 2023 | Sun conjunct natal Neptune (5th house) | Inspiration, idealization, blurred boundaries |
| 30 August 2023 | Sun sextile natal Pluto | Deep restructuring with inner support |
| 22 October 2023 | Sun trine natal Jupiter (9th house) | Expansion, study, travel |
| 21 January 2024 | Sun trine natal Sun | Integration of identity, vitality |
| 6 May 2024 | Sun enters Aquarius | A new yearly theme |
The example shows how an interpretation is built; it does not prove the method. Real life is more complex: a person may ignore a theme, live it symbolically, or meet different circumstances.
10. Comparison with secondary progressions
Minor and secondary progressions are related methods with different keys; they work best together.
| Parameter | Secondary | Minor |
|---|---|---|
| Key | 1 day = 1 year | 1 lunar month = 1 year |
| Compression | 1:365 | 1:13.37 |
| Sun | about 1° per year; sign about 30 years; cycle about 365 years | about 27° per year; sign about 13.4 months; cycle about 13.4 years |
| Moon | about 13° per year; cycle about 27.3 years; sign about 2.3 years | about 360° per year; cycle about 1 year; sign about 1 month |
| Mercury, Venus, Mars | 0.5–1.4° per year; cycles 260–690 years | 14–38° per year; cycles 9.5–25 years |
| Jupiter | about 0.08° per year; cycle about 4,300 years | about 2.3° per year; cycle about 159 years |
| Saturn | about 0.03° per year; cycle about 10,700 years | about 0.9° per year; cycle about 393 years |
| Angles | Move; several methods exist | Better fixed to the natal chart |
| Best use | Long chapters, psychological maturation | Yearly themes and monthly timing |
| Noise level | Low | High; filtering required |
Secondary progressions supply the climate: the chapter of life and themes that mature over years. Minor progressions supply the weather: which month within that chapter is most active. For example, a secondary Sun square natal Pluto may span two years; the minor Sun aspects Pluto once in that period, while the minor Moon aspects it several times, locating the peak month.
Use secondary progressions for long chapters and identity shifts, minor progressions for yearly themes and monthly focus, and transits for exact dates. Confirmation comes from all three.
11. Interpretation: reading order
To avoid drowning in detail, proceed in order: natal foundation (strong planets, emphasized houses, defining aspects); progressed Sun (sign, house, aspects — the headline of the year); progressed Moon (monthly sequence — the rhythm of the year); Mercury, Venus, and Mars (medium timers); Jupiter and Saturn (background); outer planets (long background only); angles (how the theme enters the world); synthesis (two or three themes, not twenty).
For any period, answer three questions: what is activated (planet, sign, house), where it happens (house, house ruler, natal planet), and when (orb, exact date, station, ingress). If the answers do not form a coherent story, too many factors are in play; return to the two or three main ones.
Progressions describe inner experience and attention, not guaranteed events. Phrase conclusions as "a period when the theme becomes visible," and avoid categorical predictions about health, death, divorce, or money. A progression is an emphasis, not a verdict.
12. Common mistakes
1. Using an integer age. Half a year of difference is almost half a lunar cycle for the progressed Moon.
2. Using the wrong key. 27.32158, 28, and 29.53 days produce different charts.
3. Mixing minor and secondary progressions. Keep the scales separate.
4. Judging the Moon from one chart. It returns near its natal degree every year; read it month by month.
5. Using wide orbs. At 5°, the Moon is almost always "in aspect"; use 0.5–1°.
6. Treating every lunar aspect as an event. Keep those that coincide with the Sun, transits, and natal themes.
7. Ignoring the natal chart. A progression does not create potential that is not there.
8. Recalculating angles naively. A full progressed chart can produce jumping MC and Ascendant values.
9. Expecting exact dates from slow planets. Jupiter, Saturn, and the outer planets are background.
10. Ignoring stations and making categorical predictions. Stations are milestones, and a progression is not a verdict.
The method works best for yearly planning, monthly detail within secondary progressions, and themes already visible in the natal chart and transits. It works less well without accurate houses, with mixed keys, or as a stand-alone event predictor.
13. Checklist
- [ ] Birth date, time, place, and time zone verified.
- [ ] Age calculated in fractional years.
- [ ] Key chosen and stated.
- [ ] Progressed date checked against the control ages.
- [ ] House and angle policy stated.
- [ ] Natal chart analyzed before progressions.
- [ ] Sun: sign, house, aspects, ingresses.
- [ ] Moon: monthly sequence, not a single snapshot.
- [ ] Orbs matched to planetary speed.
- [ ] Layers combined with secondary progressions and transits.
14. Conclusion
Minor progressions are a compact, practical tool. Their value is not in replacing secondary progressions but in scale: they turn a year into months and show when a theme set by slower layers becomes active.
The essentials: one lunar month equals one year; the Moon is the minute hand, the Sun the hour hand; fix the key and orbs; read the Moon in motion; progressions describe themes and attention, not guaranteed events.
Prepared by the [Astrobot](https://astrobot.chat) team. Based on the classical and modern astrological tradition.
endant, Moon, houses and aspects, monthly theme synthesis, timing by lunar houses and phases, comparison with natal and solar returns, limitations and common mistakes.