Basic Astronomical Statistics For Any Gregorian Date, Time and Location
Local Gregorian Date:
YMD
Local Std. Time:
HMS (00 to 24h)
Time Zone:
HM (00 to ±12h)
ΔT (Delta T):
±
HMS
Local Time = UT
2457901.5
0.000000000000
-0.208333333333
+0.000000000000
Longitude:
±
DMS (Neg=W)
Latitude:
±
DMS (Neg=S)
Elevation:
(meters)
-76.8233055556
+42.6763888889
Optional ΔT estimate = +70.205 = +00h 01m 10.2s
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BASIC ASTRONOMICAL STATISTICS FOR ANY GREGORIAN DATE, TIME AND LOCATION Local Date = 20170528 = 2017 May 28 - Sunday Local Time = 00:00:00.0 = 0.000000000000 day Time Zone = -05:00 = -0.208333333333 day Delta T = -00:00:00.0 = +0.000000000000 day JD00 = 2457901.5 = JD (Julian Day) number for 00h TT on date JD12 = 2457902 = (JD00 + 0.5) = Always an integer value = JD at 12h TT on date = Standard calendrical JD number for date JD = 2457901.708333333333 = (JD00 + LTFrac - TZFrac + dTFrac) = Full astronomical JD number applying all given date/time elements Date/Time TT Corresponding to Full Astronomical JD 2017 May 28 05:00:00.0 TT Time Factors Corresponding to Full Astronomical JD T = 0.174037189139 Julian centuries reckoned from J2000.0 t = 0.017403718913 Julian millennia reckoned from J2000.0 MJD00 = 57901 = (JD12 - 2400001) = Always an integer value = Modified JD number for 00h TT on date Geographic Location of Observer LngDeg = -76.8233055556 (W) = -5.1215537037 h = -05h 07m 17.6s LatDeg = +42.6763888889 (N) Elevation = 295 (meters relative to sea-level) Local Dates/Std. Times of Equinoxes and Solstices March Equinox : 2017 Mar 20 05:29:34 June Solstice : 2017 Jun 20 23:25:17 September Equinox: 2017 Sep 22 15:03:35 December Solstice: 2017 Dec 21 11:29:05 Geotopic Elements For Geographic Location rho * cos(phi) = +0.7363613602 rho * sin(phi) = +0.6743881911 Nutations (IAU 2000B Series) dPsiDeg = -0.002765932239 = Nutation in ecliptical longitude dEpsDeg = -0.002325702047 = Nutation in ecliptical obliquity dRADeg = -0.002537781319 = Equation of the equinoxes Obliquity of the Ecliptic EpsMeanDeg = 23.437028179679 = 23° 26' 13.301" EpsTrueDeg = 23.434702477632 = 23° 26' 04.929" Greenwich Sidereal Time (at longitude 0.0°) GSTMeanDeg = 320.9334572020 = 320° 56' 00.446" GSTMeanHrs = 21.3955638135 = 21h 23m 44.030s GSTTrueDeg = 320.9309194207 = 320° 55' 51.310" GSTTrueHrs = 21.3953946280 = 21h 23m 43.421s Local Sidereal Time at Longitude -76.8233055556° (W) LSTMeanDeg = 244.1101516460 = 16h 16m 26.436s = 244° 06' 36.546" LSTTrueDeg = 244.1076138647 = 16h 16m 25.827s = 244° 06' 27.410"
Jay Tanner - PHP Science Labs - 2017 - v5.2