2102 Tantalus (1975 YA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2993501212 ± 6.46e-09
Semi-major axis (a)1.2900609716 AU ± 2.87e-10
Inclination (i)64.00517356° ± 3.04e-06
Long. of Asc. Node (Ω)94.35226460° ± 4.17e-07
Arg. of Perihelion (ω)61.49851571° ± 2.17e-06
Mean Anomaly (M)347.35567572° ± 1.82e-06
Mean Motion (n)0.6726620417°/day ± 2.24e-10
Perihelion dist (q)0.90388106 AU ± 8.33e-09
Aphelion dist (Q)1.67624088 AU ± 8.34e-09
Orbital Period1.46526223 yr ± 4.88e-10
Physical Parameters
H (abs. magnitude)16.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.249″
Uncertainty0
Orbit TypeApollo
MOID0.042239 AU
Observations Used1824
Radar Obs Used1
Gaia Obs Used127
Oppositions13
Arc Total1976-2026
First Observation Used1976-01-04
Last Observation Used2026-04-05
Observations (2255)
Date Type RA Dec Mag Band Observatory
2014-07-01 04:58:15 C 15 45 31.72 +25 46 19.2 q H45
2014-07-01 04:59:45 C 15 45 31.50 +25 46 10.3 q H45
2014-07-01 05:00:40 C 15 45 31.35 +25 46 04.8 q H45
2014-07-02 21:56:00 C 15 39 53.95 +21 43 29.0 q 160
2014-07-02 21:58:52 C 15 39 53.58 +21 43 12.1 q 160
2014-07-02 22:01:43 C 15 39 53.19 +21 42 55.3 q 160
2014-07-03 22:00:18 C 15 36 52.79 +19 22 48.8 q 160
2014-07-03 22:02:37 C 15 36 52.43 +19 22 34.6 q 160
2014-07-03 22:03:46 C 15 36 52.31 +19 22 28.0 q 160
2014-07-03 22:04:55 C 15 36 52.19 +19 22 20.8 q 160
2014-07-03 22:07:11 C 15 36 51.90 +19 22 08.2 q 160
2014-07-04 22:33:28 C 15 34 00.27 +17 01 31.8 r 006
2014-07-04 22:41:24 C 15 33 59.37 +17 00 46.5 r 006
2014-07-04 22:46:20 C 15 33 58.80 +17 00 18.4 r 006
2014-07-07 19:36:24 C 15 26 56.65 +10 40 03.6 q 089
2014-07-07 19:39:24 C 15 26 56.37 +10 39 47.7 q 089
2014-07-07 19:42:24 C 15 26 56.08 +10 39 31.8 q 089
2014-07-07 19:45:24 C 15 26 55.80 +10 39 15.9 q 089
2014-07-07 19:48:24 C 15 26 55.52 +10 39 00.0 q 089
2014-07-07 19:51:24 C 15 26 55.23 +10 38 43.7 q 089
2014-07-07 19:54:24 C 15 26 54.92 +10 38 27.8 q 089
2014-07-07 19:57:24 C 15 26 54.64 +10 38 11.8 q 089
2014-07-07 20:00:24 C 15 26 54.37 +10 37 55.8 q 089
2014-07-09 02:21:31 C 15 24 14.34 +07 59 17.2 u H21
2014-07-09 02:25:17 C 15 24 14.02 +07 58 58.1 u H21
2014-07-09 02:28:51 C 15 24 13.71 +07 58 39.7 u H21
2014-07-09 02:32:24 C 15 24 13.39 +07 58 21.4 u H21
2014-07-09 02:35:58 C 15 24 13.08 +07 58 03.1 u H21
2014-07-09 02:39:32 C 15 24 12.76 +07 57 44.8 u H21
2014-07-09 02:44:39 C 15 24 12.31 +07 57 18.6 u H21
2014-07-10 02:21:02 C 15 22 17.66 +05 58 09.3 u H21
2014-07-10 02:25:06 C 15 22 17.32 +05 57 49.2 u H21
2014-07-10 02:28:58 C 15 22 17.01 +05 57 29.9 u H21
2014-07-10 02:32:28 C 15 22 16.72 +05 57 12.6 u H21
2014-07-10 02:35:46 C 15 22 16.45 +05 56 56.2 u H21
2014-07-10 02:38:54 C 15 22 16.20 +05 56 40.7 u H21
2014-07-11 02:28:56 C 15 20 28.73 +04 00 18.4 u H21
2014-07-11 02:30:50 C 15 20 28.58 +04 00 09.6 u H21
2014-07-11 02:33:17 C 15 20 28.41 +03 59 57.8 u H21
2014-07-11 02:36:33 C 15 20 28.14 +03 59 41.8 u H21
2014-07-11 02:39:00 C 15 20 27.97 +03 59 30.4 u H21
2014-07-11 02:41:57 C 15 20 27.74 +03 59 16.0 u H21
2014-07-14 21:02:07 C 15 14 48.16 -02 45 18.7 q 160
2014-07-14 21:04:06 C 15 14 48.05 -02 45 26.8 q 160
2014-07-14 21:06:04 C 15 14 47.94 -02 45 35.2 q 160
2014-07-15 22:24:57 C 15 13 30.03 -04 28 42.2 q 160
2014-07-15 22:27:59 C 15 13 29.89 -04 28 54.3 q 160
2014-07-15 22:30:58 C 15 13 29.72 -04 29 06.3 q 160
2014-07-16 02:24:03 C 15 13 18.85 -04 44 31.7 u H21
2014-07-16 02:26:43 C 15 13 18.72 -04 44 42.3 u H21
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2017-01-04 22:03:00 169565888.79 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)