99942 Apophis (2004 MN4)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.1911663196 ± 2.00e+00
Semi-major axis (a)	0.9223804710 AU ± 3.00e+00
Inclination (i)	3.34095673° ± 4.00e+00
Long. of Asc. Node (Ω)	203.89962943° ± 5.00e+00
Arg. of Perihelion (ω)	126.67282559° ± 6.00e+00
Mean Anomaly (M)	312.80548085° ± 2.46e-06
Mean Motion (n)	1.1126206784°/day ± 5.43e+00
Perihelion dist (q)	0.74605239 AU ± 3.05e+00
Aphelion dist (Q)	1.09870855 AU ± 4.02e+00
Orbital Period	0.88586012 yr ± 4.32e+00
NGA Model	r2
A1	-3.03172826e-03 AU/d²
A2	-2.37461812e-06 AU/d²

Physical Parameters

H (abs. magnitude)	19.00
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-04-29
RMS Residual	0.213″
Uncertainty	0
Orbit Type	Aten
MOID	0.000007 AU
Observations Used	8720
Oppositions	2
Arc Total	2004-2021
First Observation Used	2004-03-15
Last Observation Used	2021-05-20

Observations (10797)

Date	Type	RA	Dec	Mag	Band	Observatory
2013-01-11 21:25:54	C	08 56 27.461	-23 35 38.39	16.11	q	C20
2013-01-11 21:26:31	C	08 56 27.299	-23 35 38.01	16.07	q	C20
2013-01-11 21:27:09	C	08 56 27.115	-23 35 37.10	16.29	q	C20
2013-01-11 21:27:48	C	08 56 26.960	-23 35 36.38	16.07	q	C20
2013-01-11 21:28:25	C	08 56 26.793	-23 35 35.71	15.99	q	C20
2013-01-11 21:29:04	C	08 56 26.618	-23 35 34.83	16.08	q	C20
2013-01-11 21:29:42	C	08 56 26.443	-23 35 34.02	16.18	q	C20
2013-01-11 21:30:20	C	08 56 26.285	-23 35 33.41	16.1	q	C20
2013-01-11 21:30:57	C	08 56 26.115	-23 35 32.59	16.18	q	C20
2013-01-11 21:31:36	C	08 56 25.949	-23 35 31.91	16.07	q	C20
2013-01-11 21:32:14	C	08 56 25.767	-23 35 30.93	16.01	q	C20
2013-01-11 21:32:52	C	08 56 25.618	-23 35 30.29	16.1	q	C20
2013-01-11 21:33:30	C	08 56 25.434	-23 35 29.40	16.15	q	C20
2013-01-11 21:34:08	C	08 56 25.268	-23 35 28.76	16.06	q	C20
2013-01-11 21:34:46	C	08 56 25.111	-23 35 27.98	16.01	q	C20
2013-01-11 21:35:24	C	08 56 24.945	-23 35 27.16	16.23	q	C20
2013-01-11 21:36:02	C	08 56 24.779	-23 35 26.70	16.03	q	C20
2013-01-11 21:36:40	C	08 56 24.578	-23 35 25.94	16.12	q	C20
2013-01-11 21:37:18	C	08 56 24.415	-23 35 24.66	15.91	q	C20
2013-01-11 21:38:07	C	08 56 24.204	-23 35 23.70	15.82	q	C20
2013-01-11 21:38:44	C	08 56 24.039	-23 35 22.84	15.93	q	C20
2013-01-11 21:39:22	C	08 56 23.884	-23 35 22.11	15.79	q	C20
2013-01-11 21:40:00	C	08 56 23.714	-23 35 21.74	15.93	q	C20
2013-01-11 21:40:38	C	08 56 23.543	-23 35 20.94	16.15	q	C20
2013-01-11 21:41:18	C	08 56 23.377	-23 35 20.15	16.05	q	C20
2013-01-11 21:41:56	C	08 56 23.202	-23 35 19.38	16.15	q	C20
2013-01-11 21:42:34	C	08 56 23.044	-23 35 18.72	16.13	q	C20
2013-01-11 21:43:12	C	08 56 22.857	-23 35 17.71	16.18	q	C20
2013-01-11 21:43:50	C	08 56 22.689	-23 35 17.11	16.08	q	C20
2013-01-11 21:44:28	C	08 56 22.522	-23 35 16.34	16.05	q	C20
2013-01-11 21:45:06	C	08 56 22.345	-23 35 15.40	16.1	q	C20
2013-01-11 21:45:44	C	08 56 22.191	-23 35 14.84	16.14	q	C20
2013-01-11 21:46:22	C	08 56 22.011	-23 35 14.03	16.16	q	C20
2013-01-11 21:47:00	C	08 56 21.843	-23 35 13.08	16.07	q	C20
2013-01-11 21:47:38	C	08 56 21.679	-23 35 12.52	16.1	q	C20
2013-01-11 21:48:16	C	08 56 21.522	-23 35 11.62	16.11	q	C20
2013-01-11 21:48:54	C	08 56 21.332	-23 35 10.49	15.97	q	C20
2013-01-11 21:50:11	C	08 56 21.015	-23 35 09.42	15.85	q	C20
2013-01-11 21:50:49	C	08 56 20.853	-23 35 08.46	16.27	q	C20
2013-01-11 21:51:27	C	08 56 20.651	-23 35 07.60	15.95	q	C20
2013-01-11 21:52:05	C	08 56 20.506	-23 35 07.05	16.07	q	C20
2013-01-11 21:52:43	C	08 56 20.319	-23 35 06.42	15.84	q	C20
2013-01-11 21:53:22	C	08 56 20.161	-23 35 05.59	16.18	q	C20
2013-01-11 21:54:44	C	08 56 19.94	-23 35 03.7	–	u	C40
2013-01-11 21:56:04	C	08 56 19.57	-23 35 01.4	–	u	C40
2013-01-11 22:38:57	C	08 56 10.78	-23 34 04.9	–	o	C77
2013-01-11 22:39:30	C	08 56 10.54	-23 34 04.8	–	o	C77
2013-01-11 22:40:02	C	08 56 10.44	-23 34 02.7	–	o	C77
2013-01-11 22:40:35	C	08 56 10.31	-23 34 02.4	–	o	C77
2013-01-11 22:41:07	C	08 56 10.17	-23 34 01.6	–	o	C77

« Prev 1 2 … 44 45 46 … 215 216 Next » 10797 observations

Radar Observations (50)

Epoch (UTC)	Value	Sigma	Units	Freq (MHz)	Receiver	Transmitter
2005-01-27 23:31:00	-100849.1434	0.25	Hz	2380	-1	-1
2005-01-29 00:00:00	192028507.13	4	us	2380	-1	-1
2005-01-29 00:00:00	-102512.9059	0.25	Hz	2380	-1	-1
2005-01-30 00:18:00	195808170.79	4.5	us	2380	-1	-1
2005-01-30 00:18:00	-103799.8178	0.15	Hz	2380	-1	-1
2005-08-07 17:07:00	8186.8	0.2	Hz	2380	-1	-1
2006-05-06 12:49:00	-118256.8	0.1	Hz	2380	-1	-1
2012-12-21 11:10:00	57992.443	0.25	Hz	8560	-14	-14
2012-12-22 11:00:00	102682986.05	0.25	us	8560	-14	-14
2012-12-22 11:00:00	57880.25	0.1	Hz	8560	-14	-14
2013-01-03 09:20:00	97449107.61	0.25	us	8560	-14	-14
2013-01-03 09:20:00	36629.285	0.1	Hz	8560	-14	-14
2013-01-03 10:00:00	97439308.71	3	us	8560	-14	-14
2013-01-03 10:50:00	97428425.46	0.25	us	8560	-14	-14
2013-01-05 08:40:00	30404.009	0.2	Hz	8560	-14	-14
2013-01-05 10:40:00	96911591.52	0.25	us	8560	-14	-14
2013-01-05 10:40:00	20031.16	0.1	Hz	8560	-14	-14
2013-01-05 10:50:00	96910218.03	3	us	8560	-14	-14
2013-01-06 08:20:00	26660.815	0.1	Hz	8560	-14	-14
2013-01-06 09:30:00	20775.144	0.1	Hz	8560	-14	-14
2013-01-08 08:10:00	15496.441	0.1	Hz	8560	-14	-14
2013-01-09 08:00:00	96451449.73	0.2	us	8560	-14	-14
2013-01-09 08:00:00	9670.119	0.1	Hz	8560	-14	-14
2013-01-09 09:20:00	2690.401	0.1	Hz	8560	-14	-14
2013-01-10 08:00:00	96472652.72	0.2	us	8560	-14	-14
2013-01-10 08:00:00	2590.857	0.1	Hz	8560	-14	-14
2013-01-10 09:40:00	96473924.8	0.2	us	8560	-14	-14
2013-01-11 07:20:00	-1589.599	0.2	Hz	8560	-14	-14
2013-01-14 08:10:00	97258343.56	0.2	us	8560	-14	-14
2013-01-14 08:10:00	-30561.776	0.1	Hz	8560	-14	-14
2013-01-14 09:50:00	97283037.17	0.2	us	8560	-14	-14
2013-01-15 06:30:00	-30666.291	0.1	Hz	8560	-14	-14
2013-01-16 06:30:00	98086754	1	us	8560	-14	-14
2013-01-16 06:30:00	-39582.277	0.2	Hz	8560	-14	-14
2013-01-16 07:50:00	-46641.384	0.1	Hz	8560	-14	-14
2013-01-17 06:20:00	-47875.142	0.1	Hz	8560	-14	-14
2013-02-18 00:56:00	-76760.475	0.2	Hz	2380	-1	-1
2013-02-18 01:37:00	157906444.15	0.25	us	2380	-1	-1
2013-02-18 01:37:00	-78041.365	0.2	Hz	2380	-1	-1
2013-02-19 01:08:00	-78105.657	0.2	Hz	2380	-1	-1
2013-02-20 00:38:00	-78070.341	0.2	Hz	2380	-1	-1
2013-02-20 01:26:00	163578875.87	0.25	us	2380	-1	-1
2013-02-20 01:26:00	-79560.965	0.2	Hz	2380	-1	-1
2013-02-21 01:04:00	-79697.13	0.2	Hz	2380	-1	-1
2013-03-15 23:59:00	235220855.07	2	us	2380	-1	-1
2013-03-15 23:59:00	-80977.5254	0.238	Hz	2380	-1	-1
2021-03-03 06:40:00	29329.8	0.4	Hz	8560	-14	-14
2021-03-05 07:00:00	112426746.52	1	us	8560	-14	-14
2021-03-08 02:50:00	112625015.08	1	us	8560	-14	-14
2021-03-11 08:20:00	113796393.86	1	us	8560	-14	-14

Station codes

-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)