856955 — IAA Minor Planet Database

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.5986301917 ± 4.76e-09
Semi-major axis (a)	1.9769034985 AU ± 8.60e-10
Inclination (i)	9.08258474° ± 2.48e-06
Long. of Asc. Node (Ω)	182.08399877° ± 1.25e-05
Arg. of Perihelion (ω)	43.51935050° ± 1.22e-05
Mean Anomaly (M)	321.28960633° ± 8.48e-07
Mean Motion (n)	0.3545961951°/day ± 2.31e-10
Perihelion dist (q)	0.79346938 AU ± 9.42e-09
Aphelion dist (Q)	3.16033762 AU ± 9.51e-09
Orbital Period	2.77957377 yr ± 1.81e-09

Physical Parameters

H (abs. magnitude)	18.93
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-06-01
RMS Residual	0.236″
Uncertainty	0
Orbit Type	Apollo
MOID	0.046856 AU
Observations Used	604
Radar Obs Used	1
Oppositions	9
Arc Total	1998-2026
First Observation Used	1998-07-19
Last Observation Used	2026-01-17

Observations (646)

Date	Type	RA	Dec	Mag	Band	Observatory
1998-07-19 13:48:08	C	18 06 22.20	+54 33 51.5	–	c	566
1998-07-19 14:18:23	C	18 06 37.72	+54 30 23.6	–	c	566
2012-01-20 07:01:10	C	08 35 56.32	-05 25 15.5	–	r	703
2012-01-20 07:08:26	C	08 35 55.93	-05 25 17.7	–	r	703
2012-01-20 07:15:50	C	08 35 55.50	-05 25 21.4	–	r	703
2012-01-20 07:23:13	C	08 35 54.96	-05 25 23.6	–	r	703
2012-01-20 07:58:28	C	08 35 52.87	-05 25 37.7	–	r	703
2012-01-20 08:08:34	C	08 35 52.22	-05 25 41.1	–	r	703
2012-01-20 08:18:42	C	08 35 51.68	-05 25 44.7	–	r	703
2012-01-20 08:28:56	C	08 35 51.00	-05 25 49.5	–	r	703
2012-01-20 08:58:10	C	08 35 48.98	-05 26 02.3	–	r	H21
2012-01-20 09:01:59	C	08 35 48.76	-05 26 03.8	–	r	H21
2012-01-20 09:06:09	C	08 35 48.49	-05 26 05.5	–	r	H21
2012-01-20 16:12:52	C	08 35 24.65	-05 28 29.4	–	u	D90
2012-01-20 16:25:41	C	08 35 23.82	-05 28 33.8	–	u	D90
2012-01-20 16:38:32	C	08 35 23.05	-05 28 39.5	–	u	D90
2012-01-21 01:41:21	C	08 34 52.91	-05 32 07.6	–	o	807
2012-01-21 01:47:14	C	08 34 52.55	-05 32 09.8	–	o	807
2012-01-21 01:53:12	C	08 34 52.19	-05 32 12.1	–	o	807
2012-01-21 04:27:07	C	08 34 43.17	-05 33 29.3	–	o	G48
2012-01-21 04:29:45	C	08 34 43.01	-05 33 30.8	–	o	G48
2012-01-21 04:32:13	C	08 34 42.87	-05 33 31.4	–	o	G48
2012-01-21 04:34:43	C	08 34 42.72	-05 33 32.4	–	o	G48
2012-01-21 04:37:13	C	08 34 42.56	-05 33 32.9	–	o	G48
2012-01-21 04:39:44	C	08 34 42.42	-05 33 34.5	–	o	G48
2012-01-21 05:57:57	C	08 34 37.53	-05 34 04.4	–	r	703
2012-01-21 06:06:08	C	08 34 36.94	-05 34 07.6	–	r	703
2012-01-21 06:22:35	C	08 34 35.97	-05 34 12.0	–	r	703
2012-01-22 01:25:20	C	08 33 27.69	-05 41 01.1	–	u	I20
2012-01-22 01:43:34	C	08 33 26.52	-05 41 07.8	–	u	I20
2012-01-22 02:01:49	C	08 33 25.35	-05 41 14.5	–	u	I20
2012-01-22 03:04:06	C	08 33 21.41	-05 41 38.5	–	o	807
2012-01-22 03:08:44	C	08 33 21.11	-05 41 40.5	–	o	807
2012-01-22 03:17:15	C	08 33 20.55	-05 41 43.7	–	o	807
2012-01-22 03:25:59	C	08 33 19.98	-05 41 47.0	–	o	807
2012-01-22 03:31:45	C	08 33 19.61	-05 41 48.9	–	o	807
2012-01-22 23:32:38	C	08 32 03.66	-05 49 28.0	–	r	C92
2012-01-23 00:46:38	C	08 31 59.89	-05 49 31.9	–	o	807
2012-01-23 00:47:31	C	08 31 58.57	-05 49 55.0	–	r	C92
2012-01-23 00:52:27	C	08 31 59.52	-05 49 33.8	–	o	807
2012-01-23 00:58:17	C	08 31 59.12	-05 49 36.4	–	o	807
2012-01-23 01:04:42	C	08 31 58.71	-05 49 38.5	–	o	807
2012-01-23 01:11:15	C	08 31 58.28	-05 49 40.7	–	o	807
2012-01-23 01:16:43	C	08 31 57.92	-05 49 42.7	–	o	807
2012-01-23 15:10:12	C	08 31 02.38	-05 54 39.6	–	o	E10
2012-01-23 15:18:25	C	08 31 01.78	-05 54 41.6	–	o	E10
2012-01-24 01:54:59	C	08 30 19.01	-05 58 46.9	–	t	204
2012-01-24 02:15:26	C	08 30 17.56	-05 58 53.7	–	t	204
2012-01-25 00:42:52	C	08 28 46.03	-06 06 07.5	–	o	807
2012-01-25 00:48:39	C	08 28 45.59	-06 06 09.3	–	o	807

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856955 (2012 BT23)