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
2023-04-22 07:48:09 C 21 10 03.422 -04 17 08.92 V W68
2023-04-22 08:25:16 C 21 10 05.688 -04 17 49.09 V W68
2023-04-22 08:40:20 C 21 10 06.535 -04 18 05.22 V W68
2023-04-24 11:18:36 C 21 13 10.081 -05 13 37.85 V 703
2023-04-24 11:24:28 C 21 13 10.416 -05 13 44.62 V 703
2023-04-24 11:30:19 C 21 13 10.722 -05 13 51.20 V 703
2023-04-24 11:36:10 C 21 13 11.071 -05 13 57.90 V 703
2023-04-29 09:32:12 C 21 20 14.335 -07 32 54.78 V W68
2023-04-29 09:44:45 C 21 20 15.086 -07 33 10.19 V W68
2023-04-29 09:50:38 C 21 20 15.401 -07 33 17.53 V W68
2023-04-29 10:05:09 C 21 20 16.246 -07 33 35.93 V W68
2023-05-01 03:38:48 C 21 22 44.198 -08 26 20.00 V M22
2023-05-01 03:41:26 C 21 22 44.338 -08 26 23.03 V M22
2023-05-01 03:56:16 C 21 22 45.194 -08 26 42.11 V M22
2023-05-01 04:00:15 C 21 22 45.442 -08 26 47.51 V M22
2023-05-02 08:55:45 C 21 24 28.121 -09 04 45.59 V W68
2023-05-02 09:00:24 C 21 24 28.380 -09 04 51.56 V W68
2023-05-02 09:08:23 C 21 24 28.819 -09 05 02.15 V W68
2023-05-02 09:22:53 C 21 24 29.676 -09 05 21.59 V W68
2023-05-04 02:27:46 C 21 26 54.886 -10 01 08.98 V M22
2023-05-04 02:32:21 C 21 26 55.159 -10 01 15.17 V M22
2023-05-04 02:42:13 C 21 26 55.709 -10 01 28.96 V M22
2023-05-04 02:59:19 C 21 26 56.717 -10 01 52.79 V M22
2023-05-05 08:52:04 C 21 28 41.870 -10 43 54.73 V W68
2023-05-05 08:57:18 C 21 28 42.134 -10 44 03.01 V W68
2023-05-05 09:05:50 C 21 28 42.641 -10 44 14.53 V W68
2023-05-05 09:22:23 C 21 28 43.630 -10 44 37.03 V W68
2023-05-07 10:13:52 S 21 31 34.980 -11 56 17.87 X 275
2023-05-14 06:54:58 S 21 41 04.59 -16 25 10.3 L C51
2023-05-14 13:08:51 S 21 41 25.87 -16 36 15.8 L C51
2023-05-14 16:15:54 S 21 41 36.58 -16 41 51.3 L C51
2023-05-14 17:49:24 S 21 41 41.86 -16 44 39.2 L C51
2023-05-14 19:22:55 S 21 41 47.20 -16 47 26.9 L C51
2023-05-14 20:56:26 S 21 41 52.49 -16 50 15.1 L C51
2023-05-14 22:29:57 S 21 41 57.93 -16 53 04.3 L C51
2023-05-15 00:03:29 S 21 42 03.24 -16 55 52.8 L C51
2023-05-15 03:10:30 S 21 42 13.90 -17 01 31.9 L C51
2023-05-17 03:08:56 C 21 44 57.595 -18 30 40.82 V M22
2023-05-17 03:12:20 C 21 44 57.763 -18 30 46.98 V M22
2023-05-17 04:12:57 C 21 45 01.044 -18 32 43.30 V M22
2023-05-20 02:42:03 C 21 48 58.709 -20 52 14.92 V M22
2023-05-20 02:44:39 C 21 48 58.843 -20 52 19.74 V M22
2023-05-20 02:50:51 C 21 48 59.170 -20 52 32.70 V M22
2023-05-20 03:14:35 C 21 49 00.444 -20 53 21.44 V M22
2023-05-21 07:38:04 C 21 50 35.472 -21 52 29.93 V W68
2023-05-21 07:42:41 C 21 50 35.710 -21 52 39.58 V W68
2023-05-21 07:50:30 C 21 50 36.106 -21 52 56.28 V W68
2023-05-29 02:28:40 C 22 00 44.911 -29 05 52.51 V M22
2023-05-29 02:32:09 C 22 00 45.094 -29 06 01.62 V M22
2023-05-29 02:37:16 C 22 00 45.358 -29 06 14.51 V M22
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)