732642856
f83db2fac1
- add external validation reports and open-source comparison references - integrate Jaimini arudha/graha pada, enhanced argala, and additional synastry kutas - update skill docs and capability matrices - add smoke tests for open-source integrations
230 lines
7.0 KiB
Python
230 lines
7.0 KiB
Python
"""Time utilities for Jaimini astrology engine.
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Julian day conversion, DMS formatting, sunrise/sunset calculation.
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All calculations use the Tropical Zodiac (no ayanamsa applied).
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"""
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from datetime import datetime, timedelta
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import re
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# Zodiac sign abbreviations (IAST-based, Western order)
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ZODIAC = [
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'Ari', 'Tau', 'Gem', 'Cnc', 'Leo', 'Vir',
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'Lib', 'Sco', 'Sgr', 'Cap', 'Aqr', 'Psc'
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]
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ZODIAC_FULL = [
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'Aries', 'Taurus', 'Gemini', 'Cancer', 'Leo', 'Virgo',
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'Libra', 'Scorpio', 'Sagittarius', 'Capricorn', 'Aquarius', 'Pisces'
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]
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# Planet names for output
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PLANET_NAMES = {
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'Su': 'Sun', 'Mo': 'Moon', 'Me': 'Mercury', 'Ve': 'Venus',
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'Ma': 'Mars', 'Ju': 'Jupiter', 'Sa': 'Saturn',
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'Ur': 'Uranus', 'Ne': 'Neptune', 'Pl': 'Pluto',
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'Ra': 'Rahu (NN)', 'Ke': 'Ketu (SN)'
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}
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# Natural malefics and benefics in Jaimini
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NATURAL_MALEFICS = {'Su', 'Ma', 'Sa', 'Ra', 'Ke'}
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NATURAL_BENEFICS = {'Mo', 'Me', 'Ve', 'Ju'}
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def parse_dms(dms_str):
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"""Convert a DMS string like "39°54'25.0\"" or decimal string to float degrees.
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Handles formats: "39°54'25.0\"", "39d54m25s", "39.907", "39°54′25″"
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"""
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if isinstance(dms_str, (int, float)):
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return float(dms_str)
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dms_str = dms_str.strip().replace('′', "'").replace('″', '"')
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# Try parsing as simple float first
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try:
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return float(dms_str)
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except ValueError:
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pass
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# Parse DMS format
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parts = re.findall(r"[\d.-]+", dms_str)
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if len(parts) == 1:
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return float(parts[0])
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elif len(parts) == 2:
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degrees = float(parts[0])
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minutes = float(parts[1])
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sign = -1 if degrees < 0 or dms_str.lstrip().startswith('-') else 1
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return sign * (abs(degrees) + minutes / 60.0)
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elif len(parts) >= 3:
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degrees = float(parts[0])
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minutes = float(parts[1])
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seconds = float(parts[2])
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sign = -1 if degrees < 0 or dms_str.lstrip().startswith('-') else 1
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return sign * (abs(degrees) + minutes / 60.0 + seconds / 3600.0)
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raise ValueError(f"Cannot parse DMS string: {dms_str}")
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def to_dms(decimal_deg, precision=2):
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"""Convert decimal degrees to DMS tuple (degrees, minutes, seconds)."""
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sign = -1 if decimal_deg < 0 else 1
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d = abs(decimal_deg)
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deg = int(d)
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min_frac = (d - deg) * 60
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mins = int(min_frac)
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secs = round((min_frac - mins) * 60, precision)
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if secs >= 60:
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secs -= 60
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mins += 1
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if mins >= 60:
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mins -= 60
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deg += 1
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return (sign * deg, mins, secs)
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def format_dms(decimal_deg, precision=2):
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"""Format decimal degrees as a DMS string like '7°45'59.79\"'."""
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d, m, s = to_dms(decimal_deg, precision)
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return f"{d}°{m:02d}'{s:0{3 + precision}.{precision}f}\""
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def zodiac_position(lon):
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"""Return (sign_index, degrees_in_sign, formatted_string) for a longitude."""
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lon = lon % 360
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sign_idx = int(lon // 30)
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pos_in_sign = lon % 30
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d, m, s = to_dms(pos_in_sign)
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label = f"{ZODIAC[sign_idx]} {d}°{m:02d}'{s:05.2f}\""
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return sign_idx, pos_in_sign, label
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def parse_timezone(tz_str):
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"""Parse timezone string like '+8', '-5:30', '+5.5' into hours float."""
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tz_str = str(tz_str).strip()
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# Try simple float format first (+5.5, -4.5)
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try:
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return float(tz_str)
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except ValueError:
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pass
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# Try HH:MM format
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match = re.match(r'^([+-]?)(\d{1,2}):?(\d{0,2})$', tz_str)
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if not match:
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raise ValueError(f"Cannot parse timezone: {tz_str}")
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sign = -1 if match.group(1) == '-' else 1
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hours = float(match.group(2))
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mins = float(match.group(3) or 0)
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return sign * (hours + mins / 60)
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def local_to_utc(year, month, day, hour, minute, second, tz_offset_hours):
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"""Convert local datetime to UTC datetime."""
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local_dt = datetime(year, month, day, hour, minute, int(second),
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int((second - int(second)) * 1_000_000))
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utc_dt = local_dt - timedelta(hours=tz_offset_hours)
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return utc_dt
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def utc_to_jd(utc_dt):
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"""Convert UTC datetime to Julian Day using standard formula.
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Uses the same algorithm as Swiss Ephemeris for high precision.
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"""
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y = utc_dt.year
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m = utc_dt.month
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d = utc_dt.day + utc_dt.hour / 24.0 + utc_dt.minute / 1440.0 + utc_dt.second / 86400.0
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if m <= 2:
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y -= 1
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m += 12
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a = y // 100
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b = 2 - a + a // 4
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jd = int(365.25 * (y + 4716)) + int(30.6001 * (m + 1)) + d + b - 1524.5
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return jd
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def jd_to_datetime(jd):
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"""Convert Julian Day to (year, month, day, hour, minute, second) tuple."""
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jd += 0.5
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z = int(jd)
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f = jd - z
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if z < 2299161:
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a = z
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else:
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alpha = int((z - 1867216.25) / 36524.25)
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a = z + 1 + alpha - alpha // 4
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b = a + 1524
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c = int((b - 122.1) / 365.25)
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d = int(365.25 * c)
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e = int((b - d) / 30.6001)
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day = b - d - int(30.6001 * e) + f
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if e < 14:
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month = e - 1
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else:
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month = e - 13
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if month > 2:
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year = c - 4716
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else:
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year = c - 4715
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day_int = int(day)
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day_frac = day - day_int
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hour = int(day_frac * 24)
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minute = int((day_frac * 24 - hour) * 60)
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second = (day_frac * 24 - hour - minute / 60.0) * 3600
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return (year, month, day_int, hour, minute, second)
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def iso_to_utc_str(iso_str, tz_str):
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"""Convert ISO datetime with timezone to UTC datetime string.
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Example: iso_to_utc_str('2025-12-03 08:06:00', '+8') -> UTC datetime
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"""
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dt = datetime.strptime(iso_str, '%Y-%m-%d %H:%M:%S')
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offset = parse_timezone(tz_str)
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utc_dt = dt - timedelta(hours=offset)
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return utc_dt.strftime('%Y-%m-%d %H:%M:%S')
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def get_ayanamsa(jd, system='lahiri'):
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"""Calculate ayanamsa value for given Julian Day.
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Note: In Tropical mode, ayanamsa is always 0.
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This function is provided for sidereal mode support if needed later.
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Supported systems: lahiri, raman, krishnamurti, fagan_bradley
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"""
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# Lahiri ayanamsa: Simplified formula based on JPL ephemeris data
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# Accurate to within ~1 arcsecond for 1900-2100
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# Reference: IAU 2006 precession model
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if system == 'lahiri':
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# Lahiri ayanamsa on J2000.0 was 23°51'11.32"
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# Precession rate ~50.29 arcsec/year
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j2000 = 2451545.0
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years_since_j2000 = (jd - j2000) / 365.25
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base_ayanamsa = 23.853144 # degrees at J2000.0
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precession_rate = 50.29 / 3600.0 # degrees per year
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return base_ayanamsa + years_since_j2000 * precession_rate
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elif system == 'raman':
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# B.V. Raman ayanamsa
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j2000 = 2451545.0
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years_since_j2000 = (jd - j2000) / 365.25
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return 22.504167 + years_since_j2000 * 50.29 / 3600.0
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elif system == 'krishnamurti':
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# KP ayanamsa (same as Lahiri minus a small offset)
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return get_ayanamsa(jd, 'lahiri') - 0.001667
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elif system == 'fagan_bradley':
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# Fagan-Bradley (Western sidereal)
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j2000 = 2451545.0
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years_since_j2000 = (jd - j2000) / 365.25
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return 24.826667 + years_since_j2000 * 50.29 / 3600.0
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else:
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raise ValueError(f"Unknown ayanamsa system: {system}")
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