Asteroid Iris Ephemeris Calculator
Based the U.S. Naval Observatory AE98 Model
PHP Program By Jay Tanner
Date: (1800 to 2099) Y m d
Local Time (00h to 24h) H:M:S
Local Time Zone Offset ±H:M
Undefined1
Std. Time = UT
Apply ΔT
+00:00:00
Daylight / Summer Time
Undefined3
Longitude ±Deg.d M S
(Neg=W)
Latitude ±Deg.d M S
(Neg=S)
Sea Level Elevation
(± meters)
This program uses a cookie to store and remember the interface settings between calls.
Asteroid Iris Ephemeris Statistics Referred to True Ecliptic and Equinox of the Date Based On the U.S.N.O. Asteroid Ephemeris, 1998 Local Date = 2024 Apr 19 - Fri Local Time = 21:16:13 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460420.38626157 ================================================================================ Geocentric Equatorial Coordinates of Asteroid Iris Right Ascension = 20h 46m 10.31s = 20.7695314h = 311.5429710° Declination = -15° 20' 33.24" = -15.342566° True Distance = 2.502181297 AU = 374.320994 Mkm = 232.592282 Mmi Visual Magnitude = +10.6 Horizontal Parallax = 3.515" = 0.058577' = 0.000976276° Light/Signal Time = 20m 48.600s ================================================================================ Local Topocentric Coordinates of Asteroid Iris For Geographic Location: Longitude = -76.833611111° = -05h 07m 20.1s (W=Negative) Latitude = +42.752194444° Elevation = 0 m Topocentric RA = 20h 46m 10.20s = 20.7694989h = 311.5424839° Topocentric Decl = -15° 20' 35.01" = -15.343058° Local Hour Angle = -14h 43m 26.77s = -220.86151907364° (W=Negative) Local Sidereal Time = 06h 02m 43.432s = 6.045397656h = 90.680964838° Azimuth = 295.49046° (Measured clockwise from N=0°) = 115.49046° (Measured clockwise from S=0°) Direction = WNW Altitude = -45.65688° (Invisible - Below Local Horizon) ================================================================================ Asteroid Iris ephemeris table for each day of Apr. 2014 at 12:00 TT. Computed according to USNO AE98 ephemeris model - No Delta T applied. There are three extra (xx) days at each end of the table. JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day 2460399 20.3046085 -17.682094 2.815718310 +10.9 xx 2460400 20.3280251 -17.577137 2.801490296 +10.8 xx 2460401 20.3512947 -17.471611 2.787209438 +10.8 xx 2460402 20.3744147 -17.365538 2.772877014 +10.8 1 2460403 20.3973821 -17.258939 2.758494344 +10.8 2 2460404 20.4201939 -17.151834 2.744062810 +10.8 3 2460405 20.4428468 -17.044244 2.729583875 +10.8 4 2460406 20.4653378 -16.936189 2.715059107 +10.8 5 2460407 20.4876639 -16.827686 2.700490193 +10.8 6 2460408 20.5098226 -16.718753 2.685878951 +10.8 7 2460409 20.5318120 -16.609408 2.671227318 +10.8 8 2460410 20.5536300 -16.499673 2.656537324 +10.7 9 2460411 20.5752746 -16.389572 2.641811048 +10.7 10 2460412 20.5967437 -16.279128 2.627050569 +10.7 11 2460413 20.6180347 -16.168368 2.612257929 +10.7 12 2460414 20.6391449 -16.057315 2.597435108 +10.7 13 2460415 20.6600718 -15.945992 2.582584016 +10.7 14 2460416 20.6808127 -15.834420 2.567706492 +10.7 15 2460417 20.7013652 -15.722617 2.552804317 +10.7 16 2460418 20.7217270 -15.610604 2.537879218 +10.7 17 2460419 20.7418957 -15.498398 2.522932882 +10.6 18 2460420 20.7618692 -15.386017 2.507966957 +10.6 19 2460421 20.7816451 -15.273480 2.492983063 +10.6 20 2460422 20.8012213 -15.160806 2.477982786 +10.6 21 2460423 20.8205955 -15.048014 2.462967690 +10.6 22 2460424 20.8397654 -14.935125 2.447939316 +10.6 23 2460425 20.8587283 -14.822159 2.432899188 +10.6 24 2460426 20.8774816 -14.709141 2.417848818 +10.6 25 2460427 20.8960222 -14.596095 2.402789721 +10.5 26 2460428 20.9143468 -14.483046 2.387723424 +10.5 27 2460429 20.9324517 -14.370021 2.372651479 +10.5 28 2460430 20.9503331 -14.257048 2.357575482 +10.5 29 2460431 20.9679865 -14.144155 2.342497089 +10.5 30 2460432 20.9854077 -14.031371 2.327418032 +10.5 xx 2460433 21.0025924 -13.918722 2.312340138 +10.5 xx 2460434 21.0195363 -13.806236 2.297265344 +10.4 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ================================================================================