Asteroid Iris Ephemeris Calculator
Based on the U.S. Naval Observatory Asteroid Ephemeris, 1998
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 = 2025 Jul 17 - Thu Local Time = 03:29:32 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460873.64550926 ================================================================================ Geocentric Equatorial Coordinates of Asteroid Iris Right Ascension = 06h 34m 45.60s = 6.5793337h = 98.6900055° Declination = +22° 35' 20.77" = +22.589102° True Distance = 2.889616124 AU = 432.280419 Mkm = 268.606599 Mmi Visual Magnitude = +9.9 Horizontal Parallax = 3.043" = 0.050723' = 0.000845379° Light/Signal Time = 24m 01.932s ================================================================================ 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 = 06h 34m 45.58s = 6.5793275h = 98.6899127° Topocentric Decl = +22° 35' 18.02" = +22.588338° Local Hour Angle = +11h 28m 18.29s = 172.07619533222° (W=Negative) Local Sidereal Time = 18h 03m 03.866s = 18.051073867h = 270.766108003° Azimuth = 351.97524° (Measured clockwise from N=0°) = 171.97524° (Measured clockwise from S=0°) Direction = N Altitude = -24.25203° (Invisible - Below Local Horizon) ================================================================================ Asteroid Iris ephemeris table for each day of Jul. 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 2460855 5.7916197 +23.281618 2.900817814 +9.7 xx 2460856 5.8345860 +23.267290 2.900699743 +9.7 xx 2460857 5.8774814 +23.250302 2.900527786 +9.7 xx 2460858 5.9203039 +23.230663 2.900301891 +9.7 1 2460859 5.9630515 +23.208385 2.900021993 +9.7 2 2460860 6.0057224 +23.183481 2.899688010 +9.7 3 2460861 6.0483147 +23.155964 2.899299837 +9.7 4 2460862 6.0908268 +23.125850 2.898857344 +9.8 5 2460863 6.1332565 +23.093154 2.898360376 +9.8 6 2460864 6.1756021 +23.057892 2.897808749 +9.8 7 2460865 6.2178616 +23.020081 2.897202246 +9.8 8 2460866 6.2600329 +22.979736 2.896540609 +9.8 9 2460867 6.3021139 +22.936874 2.895823530 +9.8 10 2460868 6.3441027 +22.891509 2.895050646 +9.8 11 2460869 6.3859972 +22.843655 2.894221526 +9.8 12 2460870 6.4277956 +22.793326 2.893335671 +9.8 13 2460871 6.4694961 +22.740535 2.892392509 +9.8 14 2460872 6.5110975 +22.685295 2.891391406 +9.8 15 2460873 6.5525984 +22.627619 2.890331672 +9.9 16 2460874 6.5939976 +22.567523 2.889212577 +9.9 17 2460875 6.6352938 +22.505027 2.888033373 +9.9 18 2460876 6.6764855 +22.440149 2.886793316 +9.9 19 2460877 6.7175708 +22.372913 2.885491694 +9.9 20 2460878 6.7585472 +22.303341 2.884127849 +9.9 21 2460879 6.7994120 +22.231458 2.882701201 +9.9 22 2460880 6.8401622 +22.157285 2.881211267 +9.9 23 2460881 6.8807950 +22.080844 2.879657662 +9.9 24 2460882 6.9213076 +22.002154 2.878040099 +9.9 25 2460883 6.9616981 +21.921236 2.876358372 +9.9 26 2460884 7.0019644 +21.838108 2.874612336 +9.9 27 2460885 7.0421052 +21.752793 2.872801886 +10.0 28 2460886 7.0821191 +21.665312 2.870926934 +10.0 29 2460887 7.1220051 +21.575689 2.868987399 +10.0 30 2460888 7.1617619 +21.483949 2.866983191 +10.0 31 2460889 7.2013885 +21.390117 2.864914212 +10.0 xx 2460890 7.2408838 +21.294218 2.862780348 +10.0 xx 2460891 7.2802464 +21.196278 2.860581470 +10.0 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ================================================================================
Programmed in PHP by Jay Tanner - 2025 - v4.0
Revised 2015 Jun 12