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
2017-06-12 08:01:31 C 19 33 20.41 +14 17 35.0 u H21
2017-06-12 08:04:02 C 19 33 19.79 +14 17 24.5 u H21
2017-06-12 08:09:04 C 19 33 18.57 +14 17 03.4 u H21
2017-06-12 08:11:36 C 19 33 17.96 +14 16 52.9 u H21
2017-06-12 08:14:06 C 19 33 17.33 +14 16 42.3 u H21
2017-06-12 08:16:37 C 19 33 16.73 +14 16 31.9 u H21
2017-06-12 08:19:08 C 19 33 16.11 +14 16 21.3 u H21
2017-06-12 08:21:39 C 19 33 15.50 +14 16 10.9 u H21
2017-06-13 00:15:20 C 19 29 25.68 +13 08 26.5 q 160
2017-06-13 00:17:17 C 19 29 25.19 +13 08 18.0 q 160
2017-06-13 00:19:16 C 19 29 24.70 +13 08 09.5 q 160
2017-06-14 08:10:35 C 19 21 26.64 +10 45 09.0 u H21
2017-06-14 08:13:06 C 19 21 25.98 +10 44 57.2 u H21
2017-06-14 08:15:37 C 19 21 25.32 +10 44 45.5 u H21
2017-06-14 08:18:08 C 19 21 24.67 +10 44 33.8 u H21
2017-06-14 08:20:39 C 19 21 24.01 +10 44 22.1 u H21
2017-06-14 08:23:11 C 19 21 23.36 +10 44 10.5 u H21
2017-06-14 08:25:41 C 19 21 22.70 +10 43 58.8 u H21
2017-06-14 08:28:13 C 19 21 22.04 +10 43 47.0 u H21
2017-06-14 08:30:44 C 19 21 21.38 +10 43 35.3 u H21
2017-06-14 08:33:15 C 19 21 20.72 +10 43 23.6 u H21
2017-06-14 08:35:46 C 19 21 20.07 +10 43 12.0 u H21
2017-06-14 08:38:17 C 19 21 19.41 +10 43 00.2 u H21
2017-06-14 08:40:48 C 19 21 18.75 +10 42 48.5 u H21
2017-06-14 08:43:19 C 19 21 18.09 +10 42 36.8 u H21
2017-06-14 08:46:05 C 19 21 17.37 +10 42 23.9 u H21
2017-06-14 21:50:38 C 19 17 56.42 +09 40 45.7 15.9 q Z43
2017-06-14 22:17:22 C 19 17 49.46 +09 38 41.1 q 006
2017-06-14 22:19:01 C 19 17 49.02 +09 38 33.5 q 006
2017-06-14 22:20:40 C 19 17 48.59 +09 38 25.6 q 006
2017-06-14 22:22:19 C 19 17 48.16 +09 38 17.6 q 006
2017-06-14 22:24:36 C 19 17 47.48 +09 38 04.4 15.6 q Z43
2017-06-14 22:24:51 C 19 17 47.48 +09 38 05.5 q 006
2017-06-14 22:59:48 C 19 17 38.22 +09 35 16.6 15.6 q Z43
2017-06-16 22:17:13 C 19 04 57.80 +05 39 31.9 q 006
2017-06-16 22:18:43 C 19 04 57.40 +05 39 24.1 q 006
2017-06-16 22:20:13 C 19 04 56.97 +05 39 16.4 q 006
2017-06-16 22:21:43 C 19 04 56.54 +05 39 08.7 q 006
2017-06-16 22:23:43 C 19 04 55.99 +05 38 58.3 q 006
2017-06-17 06:34:11 C 19 02 39.68 +04 56 21.7 u H21
2017-06-17 06:36:42 C 19 02 38.97 +04 56 08.8 u H21
2017-06-17 06:39:13 C 19 02 38.25 +04 55 55.4 u H21
2017-06-17 06:41:44 C 19 02 37.53 +04 55 42.2 u H21
2017-06-17 06:44:15 C 19 02 36.83 +04 55 29.1 u H21
2017-06-17 06:47:01 C 19 02 36.04 +04 55 14.4 u H21
2017-06-17 06:49:32 C 19 02 35.33 +04 55 01.1 u H21
2017-06-17 06:52:04 C 19 02 34.61 +04 54 48.2 u H21
2017-06-17 06:54:35 C 19 02 33.89 +04 54 34.7 u H21
2017-06-17 06:57:06 C 19 02 33.17 +04 54 21.5 u H21
2017-06-17 06:59:37 C 19 02 32.46 +04 54 08.5 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)