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
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 01 - Tue Local Time = 02:43:37 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460857.61362268 ================================================================================ Geocentric Equatorial Coordinates of Asteroid Iris Right Ascension = 05h 54m 13.56s = 5.9037670h = 88.5565050° Declination = +23° 14' 18.83" = +23.238565° True Distance = 2.900395570 AU = 433.893001 Mkm = 269.608612 Mmi Visual Magnitude = +9.7 Horizontal Parallax = 3.032" = 0.050534' = 0.000842237° Light/Signal Time = 24m 07.311s ================================================================================ 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 = 05h 54m 13.49s = 5.9037480h = 88.5562194° Topocentric Decl = +23° 14' 16.16" = +23.237821° Local Hour Angle = +10h 19m 42.92s = 154.9288223336° (W=Negative) Local Sidereal Time = 16h 13m 56.410s = 16.232336113h = 243.485041689° Azimuth = 335.50799° (Measured clockwise from N=0°) = 155.50799° (Measured clockwise from S=0°) Direction = NNW Altitude = -20.07955° (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 ================================================================================