308242 (2005 GO21)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3399039890 ± 1.98e-08
Semi-major axis (a)0.7532653249 AU ± 4.84e-10
Inclination (i)24.92743501° ± 2.29e-06
Long. of Asc. Node (Ω)272.66917398° ± 7.44e-07
Arg. of Perihelion (ω)156.64470316° ± 3.90e-06
Mean Anomaly (M)47.30509206° ± 6.89e-06
Mean Motion (n)1.5076145224°/day ± 1.45e-09
Perihelion dist (q)0.49722744 AU ± 1.49e-08
Aphelion dist (Q)1.00930321 AU ± 1.49e-08
Orbital Period0.65376545 yr ± 6.31e-10
Physical Parameters
H (abs. magnitude)16.18
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.165″
Uncertainty0
Orbit TypeAten
MOID0.045073 AU
Observations Used523
Radar Obs Used8
Gaia Obs Used46
Oppositions6
Arc Total2005-2025
First Observation Used2005-04-01
Last Observation Used2025-08-31
Observations (550)
Date Type RA Dec Mag Band Observatory
2008-07-01 09:28:08 C 11 16 05.49 -14 24 39.1 r 432
2008-07-01 09:47:32 C 11 16 09.06 -14 24 16.1 r 432
2008-08-22 02:45:44 C 13 52 14.44 +09 15 16.5 r 448
2008-08-22 02:49:46 C 13 52 14.64 +09 15 21.1 r 448
2008-08-22 02:53:48 C 13 52 14.88 +09 15 25.5 r 448
2010-05-15 08:49:16 C 05 52 58.96 -48 40 24.2 r E12
2010-05-15 08:55:27 C 05 53 00.52 -48 40 24.9 r E12
2010-05-15 09:01:35 C 05 53 02.04 -48 40 25.2 r E12
2010-05-25 07:47:09 C 07 01 34.13 -47 52 43.4 u 432
2010-05-25 09:16:41 C 07 02 01.71 -47 51 40.2 u 432
2010-05-26 07:53:14 C 07 09 15.21 -47 36 23.9 u 432
2010-05-26 08:08:44 C 07 09 20.09 -47 36 11.9 u 432
2010-06-13 10:16:44 C 09 34 04.66 -34 03 40.1 r E12
2010-06-13 10:29:29 C 09 34 08.57 -34 03 00.4 r E12
2010-06-20 08:10:59 C 10 22 17.41 -24 51 52.6 u 432
2010-06-20 08:28:00 C 10 22 21.79 -24 50 51.9 u 432
2010-06-20 08:48:26 C 10 22 27.04 -24 49 38.7 u 432
2010-06-21 09:01:06 C 10 28 49.51 -23 23 17.7 u 432
2010-06-21 09:17:21 C 10 28 53.60 -23 22 18.8 u 432
2012-04-30 07:23:56 C 01 00 31.92 -57 26 18.6 u I48
2012-04-30 07:51:25 C 01 00 32.98 -57 26 21.0 u I48
2012-04-30 08:22:56 C 01 00 34.36 -57 26 24.3 u I48
2012-07-11 20:21:09 C 09 51 46.35 +55 33 44.4 u B38
2012-07-11 20:25:48 C 09 51 47.02 +55 33 46.0 u B38
2014-04-18 09:47:47 C 22 27 20.24 -47 15 51.6 u 807
2014-04-18 09:52:16 C 22 27 20.52 -47 15 47.6 u 807
2014-04-18 09:56:19 C 22 27 20.76 -47 15 44.2 u 807
2014-04-18 10:01:14 C 22 27 21.06 -47 15 39.7 u 807
2014-04-18 10:05:51 C 22 27 21.34 -47 15 35.8 u 807
2014-04-18 10:10:22 C 22 27 21.62 -47 15 31.7 u 807
2014-06-11 00:52:56 C 00 29 49.22 +03 23 18.0 q 089
2014-06-11 00:55:56 C 00 29 49.67 +03 23 34.3 q 089
2014-06-23 02:13:51 C 01 32 50.15 +30 26 11.3 q 160
2014-06-23 02:15:40 C 01 32 50.64 +30 26 21.2 q 160
2014-06-23 02:17:33 C 01 32 51.17 +30 26 31.4 q 160
2014-07-02 23:31:22 C 02 51 08.61 +47 46 35.4 q 089
2014-07-02 23:34:51 C 02 51 09.91 +47 46 47.4 q 089
2014-07-02 23:38:21 C 02 51 11.26 +47 46 58.7 q 089
2014-07-02 23:41:51 C 02 51 12.60 +47 47 10.1 q 089
2014-07-02 23:45:21 C 02 51 13.98 +47 47 21.8 q 089
2014-07-02 23:48:51 C 02 51 15.27 +47 47 33.5 q 089
2014-07-02 23:52:21 C 02 51 16.61 +47 47 45.1 q 089
2014-07-02 23:55:51 C 02 51 17.96 +47 47 56.0 q 089
2014-07-07 23:32:40 C 03 39 04.80 +52 53 38.7 q 089
2014-07-07 23:36:09 C 03 39 06.24 +52 53 45.6 q 089
2014-07-07 23:39:39 C 03 39 07.68 +52 53 52.3 q 089
2014-07-07 23:43:09 C 03 39 09.16 +52 53 59.5 q 089
2014-07-08 00:00:39 C 03 39 16.39 +52 54 34.3 q 089
2014-07-08 00:04:09 C 03 39 17.85 +52 54 41.0 q 089
2016-04-20 09:35:34 C 21 57 49.76 -33 14 52.8 q W88
Radar Observations (8)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2012-06-16 17:40:00 501233.664 2 Hz 8560 -14 -14
2012-06-16 18:00:00 498963.932 1 Hz 8560 -14 -14
2012-06-16 18:30:00 58163227.84 10 us 8560 -14 -14
2012-06-16 19:10:00 58024944.24 1 us 8560 -14 -14
2012-06-17 18:10:00 53527602.23 1 us 8560 -14 -14
2012-06-22 17:00:00 44438830.6 2.5 us 2380 -1 -1
2012-06-25 17:55:00 53578155.31 3 us 2380 -1 -1
2014-06-18 12:46:00 217960333.39 4 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)