2101 Adonis (1936 CA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7641273448 ± 2.00e+00
Semi-major axis (a)1.8740253992 AU ± 3.00e+00
Inclination (i)1.31997884° ± 4.00e+00
Long. of Asc. Node (Ω)349.40567161° ± 5.00e+00
Arg. of Perihelion (ω)43.71128561° ± 6.00e+00
Mean Anomaly (M)24.47916672° ± 7.33e-06
Mean Motion (n)0.3841926633°/day ± 9.23e-01
Perihelion dist (q)0.44203135 AU ± 3.81e+00
Aphelion dist (Q)3.30601945 AU ± 6.49e+00
Orbital Period2.56544796 yr ± 6.16e+00
NGA Modelr2
A2-3.31959118e-06 AU/d²
Physical Parameters
H (abs. magnitude)18.69
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.120″
Uncertainty0
Orbit TypeApollo
MOID0.011508 AU
Observations Used167
Radar Obs Used5
Oppositions29
Arc Total1936-2025
First Observation Used1936-02-12
Last Observation Used2025-07-19
Observations (181)
Date Type RA Dec Mag Band Observatory
2013-01-13 08:37:39 C 13 42 55.27 -09 39 09.1 u 807
2013-01-13 08:43:28 C 13 42 54.90 -09 39 07.6 u 807
2013-01-13 08:48:08 C 13 42 54.64 -09 39 06.2 u 807
2013-01-19 12:54:05 C 13 33 47.12 -08 53 31.8 r G96
2013-01-19 13:01:43 C 13 33 46.58 -08 53 29.2 r G96
2013-01-19 13:09:27 C 13 33 46.00 -08 53 26.6 r G96
2013-01-19 13:17:06 C 13 33 45.46 -08 53 23.7 r G96
2013-02-10 04:47:50 C 12 47 11.64 -04 34 18.9 19.8 u J43
2013-02-10 05:06:34 C 12 47 09.54 -04 34 06.7 20.3 u J43
2013-02-10 05:25:16 C 12 47 07.33 -04 33 53.7 20.2 u J43
2013-02-10 05:44:32 C 12 47 05.09 -04 33 41.1 19.7 u J43
2013-03-06 10:39:40 C 11 38 40.035 +02 19 57.93 L F51
2013-03-06 11:00:44 C 11 38 37.668 +02 20 11.87 L F51
2013-03-09 00:27:50 C 11 32 06.40 +02 59 42.6 q 493
2013-03-09 01:00:12 C 11 32 02.96 +03 00 02.6 q 493
2013-03-09 01:32:48 C 11 31 59.50 +03 00 23.2 q 493
2013-03-13 07:19:51 C 11 21 57.34 +04 00 55.4 u G96
2013-03-13 07:28:22 C 11 21 56.52 +04 01 00.3 u G96
2013-03-13 07:36:46 C 11 21 55.72 +04 01 05.4 u G96
2013-03-13 07:45:12 C 11 21 54.90 +04 01 09.7 u G96
2014-04-23 05:49:48 C 14 25 11.55 -15 52 59.0 L W84
2014-04-23 05:54:23 C 14 25 11.33 -15 52 57.7 L W84
2014-04-23 06:03:33 C 14 25 10.84 -15 52 55.4 L W84
2014-04-24 06:01:44 C 14 23 57.39 -15 47 07.8 23.6 L W84
2014-04-24 06:10:55 C 14 23 56.91 -15 47 05.5 L W84
2014-04-24 06:15:28 C 14 23 56.66 -15 47 04.4 L W84
2018-03-09 00:23:34 C 06 52 33.51 +24 12 30.1 U W34
2018-03-09 00:39:59 C 06 52 38.17 +24 12 21.6 U W34
2018-03-09 00:51:40 C 06 52 41.45 +24 12 14.4 U W34
2018-03-14 03:31:51 C 07 22 54.60 +23 03 36.1 U G96
2018-03-14 03:39:16 C 07 22 56.13 +23 03 31.9 U G96
2018-03-14 03:46:42 C 07 22 57.66 +23 03 27.7 U G96
2018-03-14 03:54:08 C 07 22 59.18 +23 03 23.3 U G96
2018-03-22 05:34:16 C 07 56 12.86 +21 22 58.5 U 703
2018-03-22 05:42:31 C 07 56 14.03 +21 22 54.3 U 703
2018-03-22 05:59:01 C 07 56 16.29 +21 22 46.8 U 703
2018-04-11 03:42:30 C 08 46 40.82 +18 06 14.4 U G96
2018-04-11 03:50:36 C 08 46 41.49 +18 06 11.4 U G96
2018-04-11 03:58:40 C 08 46 42.18 +18 06 08.4 U G96
2020-05-15 11:05:07 C 20 57 16.84 -19 42 53.2 V G96
2020-05-15 11:09:53 C 20 57 17.56 -19 42 50.7 V G96
2020-05-15 11:14:40 C 20 57 18.30 -19 42 48.6 V G96
2020-05-15 11:19:27 C 20 57 19.00 -19 42 45.7 V G96
2020-05-18 14:00:50 C 21 09 27.668 -18 57 54.37 U F51
2020-05-18 14:08:48 C 21 09 29.003 -18 57 49.27 U F51
2020-05-18 14:16:41 C 21 09 30.320 -18 57 44.27 U F51
2020-05-18 14:24:37 C 21 09 31.643 -18 57 39.17 U F51
2020-05-26 10:42:05 C 21 46 13.36 -16 22 43.9 V G96
2020-05-26 10:51:44 C 21 46 15.52 -16 22 33.9 V G96
2020-05-26 11:01:24 C 21 46 17.61 -16 22 24.3 V G96
Radar Observations (10)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1984-07-14 18:20:00 -328238.7 0.3 Hz 2380 -1 -1
1984-07-14.763889 -32823870 30 Hz 2380 251 251
1984-07-15 18:20:00 -341813.1 0.3 Hz 2380 -1 -1
1984-07-15.763889 -34181310 30 Hz 2380 251 251
1984-07-16 17:40:00 -350648 0.3 Hz 2380 -1 -1
1984-07-16.736111 -35064800 30 Hz 2380 251 251
1984-07-17 17:30:00 -358654.3 0.3 Hz 2380 -1 -1
1984-07-17.729167 -35865430 30 Hz 2380 251 251
1984-07-18 17:20:00 -365447.2 0.3 Hz 2380 -1 -1
1984-07-18.722222 -36544720 30 Hz 2380 251 251
Station codes
-1 Arecibo (305-m, 1963–2020)