138971 (2001 CB21)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3333956066 ± 2.78e-09
Semi-major axis (a)1.0335726681 AU ± 1.43e-10
Inclination (i)7.91834368° ± 6.35e-07
Long. of Asc. Node (Ω)353.64713274° ± 2.04e-06
Arg. of Perihelion (ω)271.93550869° ± 1.82e-06
Mean Anomaly (M)131.04916712° ± 8.25e-07
Mean Motion (n)0.9379954932°/day ± 1.95e-10
Perihelion dist (q)0.68898408 AU ± 2.87e-09
Aphelion dist (Q)1.37816125 AU ± 2.87e-09
Orbital Period1.05077934 yr ± 2.19e-10
Physical Parameters
H (abs. magnitude)18.54
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.368″
Uncertainty0
Orbit TypeApollo
MOID0.023880 AU
Observations Used2563
Radar Obs Used2
Oppositions1
Arc Total2001-2026
First Observation Used2001-02-02
Last Observation Used2026-01-13
Observations (3014)
Date Type RA Dec Mag Band Observatory
2003-02-19 18:51:55 C 05 40 10.50 +40 34 32.7 c 240
2003-02-19 18:55:34 C 05 40 10.25 +40 34 28.3 c 240
2003-02-21 18:14:07 C 05 36 49.59 +39 43 49.7 c 151
2003-02-21 18:19:41 C 05 36 49.21 +39 43 44.4 c 151
2003-02-21 18:23:10 C 05 36 48.94 +39 43 40.6 c 151
2003-02-21 18:25:24 C 05 36 48.83 +39 43 38.0 c 151
2003-02-23 21:12:15 C 05 33 44.28 +38 49 23.0 c 240
2003-02-23 21:14:51 C 05 33 44.07 +38 49 19.8 c 240
2003-02-23 21:17:28 C 05 33 43.92 +38 49 16.4 c 240
2003-02-23 21:18:55 C 05 33 43.82 +38 49 15.1 c 240
2003-02-23 21:28:12 C 05 33 43.28 +38 49 04.0 c 240
2003-02-23 21:30:48 C 05 33 43.09 +38 49 01.8 c 240
2003-02-26 18:50:50 C 05 30 22.55 +37 35 42.5 c 198
2003-02-26 19:08:01 C 05 30 21.71 +37 35 24.4 c 198
2003-02-26 19:27:28 C 05 30 20.78 +37 35 03.8 c 198
2003-02-26 19:49:14 C 05 30 19.74 +37 34 41.6 c 198
2003-02-26 20:02:29 C 05 30 19.12 +37 34 26.5 c 198
2003-03-05 03:01:41 C 05 25 47.74 +34 58 57.6 18.9 c 704
2003-03-05 03:21:27 C 05 25 47.18 +34 58 37.2 18.9 c 704
2003-03-05 03:40:39 C 05 25 46.67 +34 58 18.6 18.7 c 704
2003-03-05 03:59:35 C 05 25 46.10 +34 57 57.6 18.9 c 704
2003-03-06 03:59:59 C 05 25 20.62 +34 33 49.9 18.6 c 704
2003-03-06 04:19:02 C 05 25 20.11 +34 33 31.6 18.6 c 704
2003-03-06 04:38:46 C 05 25 19.78 +34 33 10.5 19.3 c 704
2003-03-06 04:58:22 C 05 25 19.37 +34 32 49.7 18.7 c 704
2003-03-06 05:17:28 C 05 25 18.98 +34 32 29.9 18.6 c 704
2003-03-22 20:04:48 C 05 24 58.15 +28 08 43.0 c 113
2003-03-22 20:07:35 C 05 24 58.18 +28 08 40.1 c 113
2003-03-22 20:11:45 C 05 24 58.24 +28 08 36.3 c 113
2003-03-22 20:15:56 C 05 24 58.22 +28 08 32.3 c 113
2003-04-01 02:42:41 C 05 26 06.06 +24 34 59.0 19.0 c 704
2003-04-01 02:59:28 C 05 26 06.05 +24 34 42.3 19.6 c 704
2003-04-01 03:16:10 C 05 26 05.96 +24 34 25.0 19.6 c 704
2003-04-01 03:33:03 C 05 26 05.94 +24 34 09.6 20.0 c 704
2003-04-01 03:49:53 C 05 26 05.81 +24 33 51.2 19.6 c 704
2003-10-24 11:03:55 C 07 34 53.57 +35 36 16.9 c 711
2003-10-24 11:20:12 C 07 34 54.45 +35 36 23.0 c 711
2003-10-24 11:36:29 C 07 34 55.31 +35 36 29.3 c 711
2003-11-23 07:53:31 C 07 50 15.07 +41 58 32.7 19.7 c 704
2003-11-23 08:06:30 C 07 50 14.67 +41 58 42.2 19.5 c 704
2003-11-23 08:19:15 C 07 50 14.37 +41 58 51.5 20.1 c 704
2003-11-23 08:32:16 C 07 50 13.89 +41 59 01.4 19.3 c 704
2003-11-24 10:30:52 C 07 49 25.77 +42 17 47.5 18.8 c 704
2003-11-24 10:49:14 C 07 49 25.07 +42 18 00.2 19.2 c 704
2003-11-24 11:07:34 C 07 49 24.38 +42 18 13.6 19.3 c 704
2003-11-24 11:25:57 C 07 49 23.73 +42 18 26.8 19.3 c 704
2003-11-24 11:44:07 C 07 49 22.91 +42 18 40.0 19.9 c 704
2003-11-26 09:01:39 C 07 47 40.97 +42 51 59.4 19.1 c 704
2003-11-26 09:19:47 C 07 47 40.16 +42 52 12.1 19.5 c 704
2003-11-26 09:37:57 C 07 47 39.29 +42 52 27.4 19.6 c 704
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2006-10-02 20:11:00 -9701.3065 0.5 Hz 2380 -1 -1
2006-10-02 21:29:00 47834014.65 1.5 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)