523971 (1999 AJ39)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2771054056 ± 2.00e+00
Semi-major axis (a)1.1581690197 AU ± 3.00e+00
Inclination (i)10.08991315° ± 4.00e+00
Long. of Asc. Node (Ω)298.46199885° ± 5.00e+00
Arg. of Perihelion (ω)1.67717358° ± 6.00e+00
Mean Anomaly (M)13.46938858° ± 2.17e-05
Mean Motion (n)0.7907776035°/day ± 3.07e+00
Perihelion dist (q)0.83723412 AU ± 3.17e+00
Aphelion dist (Q)1.47910392 AU ± 4.48e+00
Orbital Period1.24640136 yr ± 4.84e+00
NGA Modelr2
A23.32324102e-06 AU/d²
Physical Parameters
H (abs. magnitude)21.21
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.302″
Uncertainty0
Orbit TypeApollo
MOID0.163468 AU
Observations Used92
Oppositions5
Arc Total1999-2024
First Observation Used1999-01-15
Last Observation Used2024-12-21
Observations (93)
Date Type RA Dec Mag Band Observatory
1999-01-15 05:28:33 C 08 21 30.72 +20 08 17.0 a 691
1999-01-15 06:00:35 C 08 21 26.81 +20 08 10.7 a 691
1999-01-15 06:35:18 C 08 21 22.46 +20 08 03.1 a 691
1999-01-16 09:05:16 C 08 18 10.33 +20 02 05.7 a 691
1999-01-16 09:39:15 C 08 18 06.06 +20 01 58.0 a 691
1999-01-16 10:12:57 C 08 18 01.84 +20 01 50.5 a 691
1999-01-19 09:05:21 C 08 09 23.86 +19 44 50.4 a 691
1999-01-19 09:39:34 C 08 09 19.51 +19 44 41.7 a 691
1999-01-19 10:11:56 C 08 09 15.39 +19 44 33.1 a 691
2004-01-19 06:28:09 C 08 44 57.79 +16 09 27.3 c 691
2004-01-19 07:09:46 C 08 44 52.92 +16 09 19.8 c 691
2004-01-19 07:53:09 C 08 44 47.77 +16 09 11.5 c 691
2004-01-19 09:45:57 C 08 44 34.27 +16 08 49.8 c 651
2004-01-19 09:48:12 C 08 44 34.00 +16 08 48.9 c 651
2004-01-19 09:50:30 C 08 44 33.73 +16 08 48.3 c 651
2008-12-30 09:10:52 C 09 49 37.99 +14 13 27.9 r G96
2008-12-30 09:31:28 C 09 49 37.05 +14 13 22.4 r G96
2008-12-30 09:48:55 C 09 49 36.33 +14 13 17.2 r G96
2008-12-30 10:06:40 C 09 49 35.58 +14 13 11.7 r G96
2009-02-03 08:05:00 C 08 33 50.50 +11 09 25.4 r G96
2009-02-03 08:15:59 C 08 33 49.17 +11 09 23.2 r G96
2009-02-03 08:27:09 C 08 33 47.80 +11 09 21.2 r G96
2009-02-03 08:38:04 C 08 33 46.47 +11 09 19.4 r G96
2009-10-24 02:46:36 C 19 21 03.68 +17 33 48.9 o 291
2009-10-24 02:52:06 C 19 21 05.47 +17 33 55.0 o 291
2009-10-25 02:28:22 C 19 27 59.49 +18 01 44.3 o 291
2009-10-25 02:40:21 C 19 28 02.82 +18 01 57.5 o 291
2014-01-25 09:30:47 C 09 31 17.218 +07 54 28.41 L F51
2014-01-25 09:47:24 C 09 31 15.462 +07 54 24.49 L F51
2014-01-25 10:03:57 C 09 31 13.696 +07 54 20.84 L F51
2014-01-25 10:20:32 C 09 31 11.939 +07 54 17.01 L F51
2014-01-26 10:34:16 C 09 28 42.028 +07 48 42.41 L F51
2014-01-26 10:52:06 C 09 28 40.085 +07 48 38.45 L F51
2014-01-26 11:09:57 C 09 28 38.133 +07 48 34.30 L F51
2014-10-02 02:39:54 C 16 49 00.55 +23 03 50.9 o 291
2014-10-02 02:44:33 C 16 49 01.84 +23 04 02.2 o 291
2014-10-02 02:49:12 C 16 49 03.13 +23 04 13.4 o 291
2019-01-08 13:50:11 C 10 23 36.154 +06 45 56.37 U F51
2019-01-08 14:24:20 C 10 23 34.954 +06 45 41.70 U F51
2019-01-08 14:41:22 C 10 23 34.344 +06 45 34.26 U F51
2019-01-16 14:11:40 C 10 15 08.476 +05 26 59.79 U F51
2019-01-16 14:27:38 C 10 15 07.504 +05 26 53.78 U F51
2019-01-16 14:59:20 C 10 15 05.593 +05 26 41.47 U F51
2019-02-12 05:39:14 C 09 14 42.69 +02 28 50.4 V G96
2019-02-12 05:47:23 C 09 14 41.70 +02 28 48.7 V G96
2019-02-12 05:55:32 C 09 14 40.70 +02 28 48.0 V G96
2019-02-12 06:03:39 C 09 14 39.65 +02 28 47.2 V G96
2019-03-12 01:12:54 C 08 11 27.86 +02 11 53.6 u H21
2019-03-12 01:21:40 C 08 11 27.36 +02 11 53.9 u H21
2019-03-12 01:42:42 C 08 11 26.14 +02 11 54.8 u H21