162173 Ryugu — IAA Minor Planet Database

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.1910626253 ± 2.00e+00
Semi-major axis (a)	1.1909211747 AU ± 3.00e+00
Inclination (i)	5.86654965° ± 4.00e+00
Long. of Asc. Node (Ω)	251.29160345° ± 5.00e+00
Arg. of Perihelion (ω)	211.61670373° ± 6.00e+00
Mean Anomaly (M)	270.65926628° ± 7.56e-06
Mean Motion (n)	0.7583815353°/day ± 2.87e+00
Perihelion dist (q)	0.96338065 AU ± 3.40e+00
Aphelion dist (Q)	1.41846170 AU ± 4.29e+00
Orbital Period	1.29964436 yr ± 4.91e+00
NGA Model	r2
A2	1.49982929e-05 AU/d²

Physical Parameters

H (abs. magnitude)	19.55
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-04-27
RMS Residual	0.086″
Uncertainty	0
Orbit Type	Apollo
MOID	0.000212 AU
Observations Used	4741
Gaia Obs Used	94
Oppositions	7
Arc Total	1986-2016
First Observation Used	1999-05-10
Last Observation Used	2025-07-23

Observations (7718)

Date	Type	RA	Dec	Mag	Band	Observatory
2020-10-07 20:23:13	C	23 23 03.75	+34 37 44.6	–	q	Z36
2020-10-07 20:24:20	C	23 23 03.63	+34 37 44.6	–	q	Z36
2020-10-07 20:25:29	C	23 23 03.50	+34 37 44.1	–	q	Z36
2020-10-07 20:26:38	C	23 23 03.40	+34 37 44.0	–	q	Z36
2020-10-07 20:27:46	C	23 23 03.28	+34 37 43.8	–	q	Z36
2020-10-07 20:28:53	C	23 23 03.14	+34 37 43.5	–	q	Z36
2020-10-07 20:30:02	C	23 23 03.02	+34 37 43.2	–	q	Z36
2020-10-07 20:31:10	C	23 23 02.92	+34 37 43.1	–	q	Z36
2020-10-07 20:32:17	C	23 23 02.79	+34 37 42.6	–	q	Z36
2020-10-07 20:33:26	C	23 23 02.68	+34 37 42.5	–	q	Z36
2020-10-07 20:34:35	C	23 23 02.56	+34 37 42.2	–	q	Z36
2020-10-07 20:35:43	C	23 23 02.42	+34 37 41.8	–	q	Z36
2020-10-07 20:36:52	C	23 23 02.31	+34 37 41.7	–	q	Z36
2020-10-07 20:37:59	C	23 23 02.18	+34 37 41.4	–	q	Z36
2020-10-07 20:39:08	C	23 23 02.09	+34 37 41.1	–	q	Z36
2020-10-07 20:40:16	C	23 23 01.94	+34 37 41.0	–	q	Z36
2020-10-07 20:41:23	C	23 23 01.83	+34 37 40.6	–	q	Z36
2020-10-07 20:42:31	C	23 23 01.71	+34 37 40.5	–	q	Z36
2020-10-07 20:43:40	C	23 23 01.58	+34 37 40.3	–	q	Z36
2020-10-07 20:44:47	C	23 23 01.46	+34 37 39.8	–	q	Z36
2020-10-07 20:45:55	C	23 23 01.35	+34 37 39.4	–	q	Z36
2020-10-07 20:47:04	C	23 23 01.18	+34 37 39.0	–	q	Z36
2020-10-07 20:48:13	C	23 23 01.11	+34 37 38.8	–	q	Z36
2020-10-07 20:49:20	C	23 23 00.96	+34 37 38.7	–	q	Z36
2020-10-07 20:50:28	C	23 23 00.84	+34 37 38.2	–	q	Z36
2020-10-07 20:51:37	C	23 23 00.71	+34 37 38.2	–	q	Z36
2020-10-07 20:52:46	C	23 23 00.59	+34 37 37.9	–	q	Z36
2020-10-07 20:53:53	C	23 23 00.49	+34 37 37.4	–	q	Z36
2020-10-07 20:55:01	C	23 23 00.35	+34 37 37.3	–	q	Z36
2020-10-07 20:56:10	C	23 23 00.23	+34 37 36.9	–	q	Z36
2020-10-07 20:57:17	C	23 23 00.11	+34 37 36.9	–	q	Z36
2020-10-07 20:58:25	C	23 23 00.01	+34 37 36.7	–	q	Z36
2020-10-07 20:59:34	C	23 22 59.87	+34 37 36.1	–	q	Z36
2020-10-07 21:00:43	C	23 22 59.74	+34 37 35.8	–	q	Z36
2020-10-07 21:01:50	C	23 22 59.63	+34 37 35.8	–	q	Z36
2020-10-07 21:02:59	C	23 22 59.51	+34 37 35.4	–	q	Z36
2020-10-07 21:04:07	C	23 22 59.39	+34 37 35.1	–	q	Z36
2020-10-07 21:05:16	C	23 22 59.27	+34 37 34.7	–	q	Z36
2020-10-07 21:06:25	C	23 22 59.14	+34 37 34.6	–	q	Z36
2020-10-07 21:07:32	C	23 22 59.02	+34 37 34.4	–	q	Z36
2020-10-07 21:08:40	C	23 22 58.91	+34 37 33.9	–	q	Z36
2020-10-07 21:09:50	C	23 22 58.76	+34 37 33.7	–	q	Z36
2020-10-07 21:10:58	C	23 22 58.67	+34 37 33.4	–	q	Z36
2020-10-07 21:12:05	C	23 22 58.55	+34 37 33.0	–	q	Z36
2020-10-07 21:13:14	C	23 22 58.40	+34 37 32.7	–	q	Z36
2020-10-07 21:14:23	C	23 22 58.28	+34 37 32.4	–	q	Z36
2020-10-07 21:15:31	C	23 22 58.16	+34 37 32.2	–	q	Z36
2020-10-07 21:16:38	C	23 22 58.05	+34 37 32.0	–	q	Z36
2020-10-07 21:17:47	C	23 22 57.93	+34 37 31.6	–	q	Z36
2020-10-07 21:18:56	C	23 22 57.79	+34 37 31.2	–	q	Z36

« Prev 1 2 … 23 24 25 … 154 155 Next » 7718 observations

Epoch (UTC)	Value	Sigma	Units	Freq (MHz)	Receiver	Transmitter
2020-12-12 03:00:00	70251762.49	2	us	8560	-14	-14
2020-12-18 01:10:00	64846561.92	2	us	8560	-14	-14

162173 Ryugu (1999 JU3)