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
2017-01-05 01:53:21 C 01 05 43.55 +18 37 05.8 q H45
2017-01-06 18:24:23 C 00 44 27.02 +24 24 13.2 q C23
2017-01-06 18:28:41 C 00 44 24.90 +24 24 45.6 q C23
2017-01-06 18:33:18 C 00 44 22.61 +24 25 20.1 q C23
2017-01-06 18:37:55 C 00 44 20.33 +24 25 54.6 q C23
2017-01-06 20:22:56 C 00 43 28.30 +24 38 59.9 q 160
2017-01-06 20:24:34 C 00 43 27.47 +24 39 12.0 q 160
2017-01-06 20:26:21 C 00 43 26.58 +24 39 25.3 q 160
2017-01-06 20:50:02 C 00 43 15.05 +24 42 19.2 o 107
2017-01-06 20:52:10 C 00 43 14.03 +24 42 34.8 o 107
2017-01-06 20:54:35 C 00 43 12.85 +24 42 52.3 o 107
2017-01-06 20:57:00 C 00 43 11.67 +24 43 10.3 o 107
2017-01-07 18:37:44 n 00 33 11.20 +27 13 09.3 q 619
2017-01-07 18:48:55 n 00 33 06.12 +27 14 21.1 q 619
2017-01-07 18:56:44 n 00 33 02.58 +27 15 11.0 q 619
2017-01-07 19:04:39 n 00 32 59.01 +27 16 01.8 q 619
2017-01-08 01:49:17 C 00 30 01.54 +27 58 30.6 q H45
2017-01-08 01:50:22 C 00 30 01.06 +27 58 37.4 q H45
2017-01-08 01:51:27 C 00 30 00.59 +27 58 43.9 q H45
2017-01-08 01:52:42 C 00 30 00.03 +27 58 51.6 q H45
2017-01-08 01:53:43 C 00 29 59.58 +27 58 57.8 q H45
2017-01-08 01:54:33 C 00 29 59.22 +27 59 02.9 q H45
2017-01-08 04:46:34 C 00 28 46.02 +28 16 44.5 L T05
2017-01-08 05:14:19 C 00 28 33.83 +28 19 31.2 L T05
2017-01-08 05:29:37 C 00 28 27.12 +28 21 02.8 L T05
2017-01-08 05:33:19 C 00 28 25.51 +28 21 24.8 L T05
2017-01-08 19:29:39 C 00 22 38.08 +29 41 20.4 q 160
2017-01-08 19:31:56 C 00 22 37.14 +29 41 32.8 q 160
2017-01-08 19:34:12 C 00 22 36.20 +29 41 44.9 q 160
2017-01-08 23:35:34 C 00 20 59.98 +30 03 41.6 q I15
2017-01-08 23:37:18 C 00 20 59.26 +30 03 51.0 q I15
2017-01-08 23:39:02 C 00 20 58.57 +30 04 00.0 q I15
2017-01-09 01:15:10 C 00 20 20.22 +30 12 37.3 q H45
2017-01-09 01:15:55 C 00 20 19.91 +30 12 41.3 q H45
2017-01-09 01:16:54 C 00 20 19.50 +30 12 46.4 q H45
2017-01-09 01:17:55 C 00 20 19.10 +30 12 51.9 q H45
2017-01-09 01:19:03 C 00 20 18.64 +30 12 57.8 q H45
2017-01-09 01:19:51 C 00 20 18.31 +30 13 02.1 q H45
2017-01-12 05:36:35 C 23 53 56.62 +35 37 25.8 L T05
2017-01-12 06:00:58 C 23 53 49.12 +35 38 46.6 L T05
2017-01-12 06:11:57 C 23 53 45.74 +35 39 22.9 L T05
2017-01-12 06:16:24 C 23 53 44.38 +35 39 37.4 L T05
2017-01-12 06:29:43 C 23 53 40.30 +35 40 21.5 L T05
2017-01-12 06:37:39 C 23 53 37.86 +35 40 47.6 L T05
2017-01-12 06:41:22 C 23 53 36.75 +35 40 59.9 L T05
2017-01-12 06:50:04 C 23 53 34.07 +35 41 28.4 L T05
2017-01-12 06:59:43 C 23 53 31.11 +35 42 00.3 L T05
2017-01-14 17:21:21 C 23 37 41.08 +38 29 02.9 q Z52
2017-01-14 18:01:18 C 23 37 31.00 +38 30 39.6 q Z52
2017-01-14 18:47:38 C 23 37 19.39 +38 32 30.9 q Z52
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)