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
2022-01-10 12:39:13 C 11 39 46.28 +22 51 38.1 V T08
2022-01-10 12:45:15 C 11 39 46.64 +22 51 38.7 V T08
2022-01-11 08:51:57 C 11 41 16.17 +22 52 06.3 V 703
2022-01-11 09:18:21 C 11 41 18.11 +22 52 06.3 V 703
2022-01-11 09:25:57 C 11 41 18.74 +22 52 06.9 V 703
2022-01-11 09:33:33 C 11 41 19.24 +22 52 06.8 V 703
2022-01-14 08:22:35 C 11 46 34.04 +22 55 04.0 V 703
2022-01-14 08:30:46 C 11 46 34.60 +22 55 04.8 V 703
2022-01-14 10:03:53 C 11 46 40.97 +22 55 12.8 V 703
2022-01-14 10:12:03 C 11 46 41.56 +22 55 11.9 V 703
2022-01-14 12:58:44 C 11 46 54.00 +22 55 26.8 V T08
2022-01-14 13:05:15 C 11 46 54.47 +22 55 26.9 V T08
2022-01-14 13:09:16 C 11 46 54.75 +22 55 27.3 V T08
2022-01-14 13:17:16 C 11 46 55.29 +22 55 28.4 V T08
2022-01-15 08:09:25 C 11 48 19.67 +22 56 27.3 V 703
2022-01-15 08:17:25 C 11 48 20.20 +22 56 28.6 V 703
2022-01-15 08:25:24 C 11 48 20.77 +22 56 28.6 V 703
2022-01-15 08:33:23 C 11 48 21.34 +22 56 29.6 V 703
2022-01-15 10:04:19 C 11 48 27.61 +22 56 36.7 V G96
2022-01-15 10:12:27 C 11 48 28.17 +22 56 36.9 V G96
2022-01-15 10:20:35 C 11 48 28.72 +22 56 37.9 V G96
2022-01-15 10:28:43 C 11 48 29.26 +22 56 38.5 V G96
2022-01-24 11:01:23 C 12 04 45.11 +23 19 20.8 V 703
2022-01-24 11:09:18 C 12 04 45.69 +23 19 21.8 V 703
2022-01-24 11:17:12 C 12 04 46.24 +23 19 22.3 V 703
2022-01-24 11:25:08 C 12 04 46.71 +23 19 24.0 V 703
2022-01-24 14:40:17 C 12 05 01.69 +23 20 00.2 V T05
2022-01-24 14:44:55 C 12 05 02.00 +23 20 00.9 V T05
2022-01-24 15:15:22 C 12 05 04.06 +23 20 05.0 V T05
2022-01-24 15:24:08 C 12 05 04.66 +23 20 06.3 V T05
2022-01-24 23:42:06 C 12 05 45.02 +23 21 04.2 V C23
2022-01-24 23:48:21 C 12 05 45.53 +23 21 05.4 V C23
2022-01-24 23:54:35 C 12 05 45.95 +23 21 07.2 V C23
2022-01-27 08:42:18 C 12 10 13.38 +23 30 55.3 V 703
2022-01-27 08:49:53 C 12 10 13.93 +23 30 57.3 V 703
2022-01-27 08:57:27 C 12 10 14.47 +23 30 59.0 V 703
2022-01-27 09:05:02 C 12 10 15.04 +23 31 00.6 V 703
2022-01-27 12:17:45 C 12 10 30.38 +23 31 43.9 V T08
2022-01-27 12:21:46 C 12 10 30.67 +23 31 44.8 V T08
2022-01-27 12:24:26 C 12 10 30.87 +23 31 45.3 V T08
2022-01-27 12:25:46 C 12 10 30.96 +23 31 45.5 V T08
2022-01-27 12:27:45 C 12 10 31.08 +23 31 45.8 V T08
2022-01-27 12:31:48 C 12 10 31.38 +23 31 46.6 V T08
2022-01-27 12:33:07 C 12 10 31.47 +23 31 47.1 V T08
2022-01-27 12:46:15 C 12 10 32.40 +23 31 49.5 V T08
2022-01-27 23:26:20 C 12 11 24.13 +23 33 28.8 V C23
2022-01-27 23:30:29 C 12 11 24.44 +23 33 29.8 V C23
2022-01-27 23:32:34 C 12 11 24.62 +23 33 30.7 V C23
2022-01-28 12:04:11 C 12 12 25.03 +23 36 17.5 V T08
2022-01-28 12:06:51 C 12 12 25.22 +23 36 18.1 V T08
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)