Lesson S01-M04-L01: Locating Planets and the Ascendant — The Manual Method — Workbook¶
Course / Module 4 — Locating Planets (Historical Method) / Chapter 5 — To Find Out Planetary Position / Lesson S01-M04-L01: Locating Planets and the Ascendant — The Manual Method — Workbook
S01-M04-L01 · Chapter 5 — To Find Out Planetary Position
📖 Lesson → 📝 Workbook → 📊 Application → ✅ Quiz
Homework
Homework is included in this Workbook. Complete the marked Homework sections before moving to the Quiz.
Homework — Practice and Understanding is on this page. Homework — Chart Observation and Application continues on this chapter's Application page.
1. Chapter Purpose¶
Chapter 5 is BPHS's own explanation of how a birth chart's raw numbers — planetary longitudes, the Moon's exact position, the Ascendant, and all twelve house cusps — were derived by hand from an almanac and a stopwatch, before any software existed to do it instantly. It matters not because a modern student needs to reproduce it, but because it's the only place BPHS defines what a chart's numbers actually represent and depend on.
2. Connection Bridge¶
- Builds on: nothing specific from Modules 1–3 — the first calculation-heavy chapter, self-contained.
- Feeds forward into: Ch. 6–8 (Vargas/divisional charts, S1-M5 and S3-M22) — computed from exact planetary longitudes; Ch. 48+ (Dashas, Semester 3) — require the same exact-birth-moment precision.
Bridge prompt: Before reading, write one sentence: when you look at a chart your software generated, do you currently know (without checking) what Ayanamsha it used?
3. Memorize · Understand · Apply¶
| Memorize (fixed facts) | Understand (frameworks) | Apply (carry forward) |
|---|---|---|
| Ghati/Pala/Vipala conversions (60:60:60, 1 day = 60 Ghati) | Why the Ascendant needs Swodaya (local) but the 10th House needs Lankodaya (equatorial) | Convert a clock-time interval into Ghati-Pala-Vipala |
| The 5 sub-procedures in order | Why Saayana/Nirayana conversion happens only at the final step, not throughout | Trace one stage of the Hapur example independently |
4. Homework — Practice and Understanding¶
(Closed-form items are self-check-only — no answers on this part of the page. Check your work against §9 Check Answers and Explanations below.)
Recall
R1. What are the five outputs of Chapter 5's overall method, in order? R2. What is the difference between Saayana and Nirayana, and at what point in the method does the chapter convert between them? R3. What triggers the "Ashuddha sign" designation during the Ascendant calculation?
Understanding
U1. State, in your own words, why an almanac's fixed-moment (Pankti) planetary data needs correcting before it can represent the exact birth moment. U2. Why couldn't the Pankti (almanac) table alone give a precise-enough Moon position, when it was considered sufficient for the other planets? U3. Explain, in your own words, why a sign's rising-time (Swodaya) isn't simply 30° worth of clock-time for every sign — and how this differs from Lankodaya, the value used for the 10th House instead. U4. Now that you've read this chapter, explain in a short paragraph why a chart-casting program's Ayanamsha setting matters just as much today as the Ayanamsha step mattered in BPHS's manual method — even though the arithmetic itself is now invisible to the user.
Application
A1. Convert 3 hours 47 minutes of clock time into Ghati-Pala-Vipala (using the book's ×2½ conversion factor from clock-hours to Ghatis). A2. A planet's Pankti-table position is 2s 5°10′00″ and its daily motion is 1°2′. If the positive Chaalana (Aishya) works out to 0 day – 30 Ghati – 0 Pala, what is the corrected position? (Hint: 30 Ghati is half a day; scale the daily motion proportionally.) A3. Two Kshepakas trisect the arc from a 1st House at 5s10° to a 4th House at 8s10°. What is the value of one Kshepaka, and what would the 2nd House (Ascendant + 1 Kshepaka) be? A4. If the Ishta Kaala falls before the Pankti Kaala, is the Chaalana Yaata (subtract) or Aishya (add)? What happens to this rule for retrograde planets?
Source Awareness
S1. Locate the exact verse(s) that define Chaalana and the Yaata/Aishya distinction. Give chapter and verse. S2. Locate the exact verse(s) that describe the trisection (Kshepaka) method for deriving the remaining ten houses. Give chapter and verse. S3. Is the Hapur worked example (2-6-1951) part of Parashara's own verse text, or translator commentary? How do you know?
Fill-in-the-Blank
F1. 1 Ghati = _ Palas; 1 Pala = _ Vipalas. F2. The Ascendant calculation uses _ (local sign-rising-time), while the 10th House calculation uses _ (equatorial sign-rising-time). F3. The remaining ten houses are derived from the Ascendant and 10th House by a trisection method called __.
Matching
| # | Term | Letter | Description |
|---|---|---|---|
| 1 | Chaalana | ||
| 2 | Palbha | ||
| 3 | Bhayaata | ||
| 4 | Kshepaka |
A. A trisected portion of the arc between two known house cusps B. The correction applied to an almanac's fixed-moment planetary data C. A measured midday shadow-length encoding the birthplace's latitude D. The Ghati/Pala value of a Nakshatra already passed at the birth moment
Check Answers — Recall, Understanding, Application, Source Awareness, Fill-in-the-Blank, Matching
Recall
- R1. (1) A time-corrected Pankti planetary position; (2) the Moon's exact longitude via Bhayaata/Bhabhoga; (3) the Ascendant (Lagna); (4) the 10th House; (5) the remaining ten houses via trisection (Kshepaka/Bhava-Sandhi) (Ch.5, throughout).
- R2. Saayana = tropical, Ayanamsha-inclusive position; Nirayana = sidereal, Ayanamsha-corrected position. The method computes in Saayana terms throughout and converts to Nirayana only at the final step (v.18 for the Ayanamsha-corrected Sun position feeding the Ascendant calculation; v.19½ for the final Nirayana Ascendant itself).
- R3. The Ashuddha sign is the sign where the running subtraction of Swodaya/Lankodaya values first goes negative — the entire final Ascendant/10th House answer depends on stopping the subtraction at that correct sign.
Understanding
- U1. The almanac (Pankti) only lists planetary positions at fixed reference moments roughly every 8 days at local midnight — a birth almost never occurs exactly then, so the listed positions must be corrected (Chaalana) forward or backward to the exact birth moment (Ishta Kaala) using each planet's own daily motion.
- U2. The Moon moves fast enough, and unevenly enough across her orbit, that the simple Chaalana correction (adequate for the slower-moving Pankti-listed planets) wasn't considered precise enough — a separate Nakshatra-based refinement (how much of the current Nakshatra has been traversed vs. its full span) was used instead.
- U3. Sign-rising-time isn't a flat 30° of clock-time because the ecliptic meets the horizon at a changing angle as different signs rise — some signs rise faster, some slower. Swodaya is a sign's rising-time at the birthplace's own latitude, used for the Ascendant (a horizon phenomenon); Lankodaya is a sign's rising-time at the equator (zero latitude), used as a fixed reference for the 10th House (a meridian/culmination phenomenon) instead.
- U4. Accept any answer that connects Ayanamsha choice (or birth-time/place accuracy) to a real risk that software conceals by default — e.g., noting that two different software programs with different default Ayanamsha settings will silently produce different sidereal longitudes for the same exact birth data, just as BPHS's own Saayana→Nirayana conversion step was a deliberate, visible arithmetic step rather than an invisible default.
Application
- A1. 3h47m0s × 2½ → 9 Ghati – 27 Pala – 30 Vipala.
- A2. Half-day (30 Ghati) motion = half of 1°2′ (62′) = 31′. Aishya (add): 2s5°10′00″ + 0°31′00″ = 2s5°41′00″.
- A3. Arc (4th − 1st) = 8s10° − 5s10° = 3s0° = 90°. One Kshepaka = 90°/3 = 1s0°00′00″ (30°). 2nd House = 5s10° + 1s0° = 6s10°00′00″.
- A4. Yaata (subtract). For retrograde planets, the rule reverses — Yaata becomes add, Aishya becomes subtract (BPHS v.4's own stated exception).
Source Awareness
- S1. Ch. 5, v.2–4.
- S2. Ch. 5, v.23–24.
- S3. Translator commentary. The Hapur example (dated 2-6-1951, well after Parashara's era) appears in the prose Notes following the verses, not within the numbered shloka text itself.
Fill-in-the-Blank
- F1. 60 / 60
- F2. Swodaya / Lankodaya
- F3. Kshepaka
Matching
1–B, 2–C, 3–D, 4–A