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
2025-10-13 14:47:02 C 09 39 32.163 +09 17 54.85 X F51
2025-10-13 14:53:45 C 09 39 33.263 +09 18 02.19 X F51
2025-10-13 15:00:26 C 09 39 34.374 +09 18 09.60 X F51
2025-10-13 15:07:08 C 09 39 35.478 +09 18 16.97 X F51
2025-10-21 11:41:07 C 10 13 32.178 +12 54 35.93 V G96
2025-10-21 11:50:44 C 10 13 34.050 +12 54 47.41 V G96
2025-10-21 12:00:21 C 10 13 35.922 +12 54 59.00 V G96
2025-10-21 12:07:52 C 10 13 37.373 +12 55 08.04 V G96
2025-10-22 14:53:33 C 10 18 54.845 +13 27 16.20 V T08
2025-10-22 14:58:16 C 10 18 55.771 +13 27 21.56 V T08
2025-10-22 15:10:33 C 10 18 58.198 +13 27 35.96 V T08
2025-10-22 15:25:45 C 10 19 01.303 +13 27 55.26 V T08
2025-10-24 12:05:26 C 10 28 08.339 +14 22 01.02 V 703
2025-10-24 12:09:06 C 10 28 09.163 +14 22 04.48 V 703
2025-10-24 12:12:45 C 10 28 09.894 +14 22 08.44 V 703
2025-10-24 12:16:24 C 10 28 10.675 +14 22 13.87 V 703
2025-10-26 12:21:47 C 10 38 24.904 +15 21 01.33 V 703
2025-10-26 12:24:04 C 10 38 25.408 +15 21 03.02 V 703
2025-10-26 12:26:20 C 10 38 25.886 +15 21 06.59 V 703
2025-10-26 12:28:37 C 10 38 26.473 +15 21 08.35 V 703
2025-10-28 11:34:44 C 10 48 54.310 +16 18 54.58 V 703
2025-10-28 11:38:18 C 10 48 55.055 +16 18 58.39 V 703
2025-10-28 11:41:51 C 10 48 55.832 +16 19 03.50 V 703
2025-10-28 11:45:24 C 10 48 56.642 +16 19 06.82 V 703
2025-11-02 12:27:08 C 11 17 47.832 +18 45 08.60 V G96
2025-11-02 12:32:34 C 11 17 49.193 +18 45 15.01 V G96
2025-11-02 12:38:01 C 11 17 50.550 +18 45 21.53 V G96
2025-11-02 12:43:27 C 11 17 51.904 +18 45 28.15 V G96
2025-11-04 11:43:52 C 11 29 54.503 +19 40 13.69 V 703
2025-11-04 11:57:55 C 11 29 58.074 +19 40 28.88 V 703
2025-11-04 12:04:56 C 11 29 59.896 +19 40 37.45 V 703
2025-11-08 12:34:13 C 11 56 04.326 +21 25 57.14 V 703
2025-11-08 12:37:34 C 11 56 05.320 +21 25 59.88 V 703
2025-11-08 12:40:56 C 11 56 06.202 +21 26 03.84 V 703
2025-11-08 12:44:17 C 11 56 07.163 +21 26 07.26 V 703
2025-11-11 14:57:54 C 12 17 18.168 +22 37 59.45 V T05
2025-11-11 15:02:36 C 12 17 19.615 +22 38 04.16 V T05
2025-11-11 15:19:22 C 12 17 24.446 +22 38 19.32 V T05
2025-11-11 15:30:51 C 12 17 27.818 +22 38 29.98 V T05
2025-12-09 12:41:03 C 15 32 01.140 +23 39 27.79 V 703
2025-12-09 12:47:00 C 15 32 02.623 +23 39 24.19 V 703
2025-12-09 12:52:57 C 15 32 04.124 +23 39 20.09 V 703
2025-12-09 12:58:54 C 15 32 05.521 +23 39 17.42 V 703
2026-03-30 03:06:44 C 20 46 16.471 -10 08 15.47 V M22
2026-03-30 03:11:22 C 20 46 16.860 -10 08 18.56 V M22
2026-03-30 03:23:58 C 20 46 17.842 -10 08 28.36 V M22
2026-03-30 03:27:56 C 20 46 18.226 -10 08 31.92 V M22
2026-03-30 03:31:50 C 20 46 18.463 -10 08 34.87 V M22
2026-03-30 03:37:05 C 20 46 18.886 -10 08 38.62 V M22
2026-03-30 03:39:04 C 20 46 19.073 -10 08 40.27 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)