2329 Orthos (1976 WA)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6533456164 ± 5.97e-09
Semi-major axis (a)2.4113099256 AU ± 1.95e-09
Inclination (i)24.46389629° ± 2.94e-07
Long. of Asc. Node (Ω)169.24806462° ± 7.20e-07
Arg. of Perihelion (ω)146.10872860° ± 9.78e-07
Mean Anomaly (M)71.29202635° ± 1.34e-06
Mean Motion (n)0.2632283887°/day ± 3.20e-10
Perihelion dist (q)0.83589116 AU ± 1.44e-08
Aphelion dist (Q)3.98672870 AU ± 1.48e-08
Orbital Period3.74437684 yr ± 4.55e-09
Physical Parameters
H (abs. magnitude)14.57
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.022″
Uncertainty0
Orbit TypeApollo
MOID0.094617 AU
Observations Used1705
Gaia Obs Used109
Oppositions30
Arc Total1976-2026
First Observation Used1976-05-31
Last Observation Used2026-03-04
Observations (1882)
Date Type RA Dec Mag Band Observatory
1991-03-13 08:19:20 A 14 46 07.76 +04 39 14.4 801
1991-03-16 08:44:23 A 14 47 41.95 +05 48 48.4 801
1991-03-16 08:52:22 A 14 47 42.05 +05 48 55.8 801
1991-04-12 06:48:47 A 14 49 38.89 +20 36 19.0 801
1991-04-12 06:59:49 A 14 49 38.69 +20 36 38.5 801
1991-04-14 06:56:38 A 14 48 43.66 +22 00 27.2 801
1991-04-14 07:11:06 A 14 48 43.32 +22 00 52.6 801
1991-04-15 08:02:30 A 14 48 11.07 +22 45 04.6 688
1991-04-15 08:06:30 A 14 48 10.98 +22 45 11.7 688
1991-04-18 10:51:32 14 46 15.70 +25 00 31.1 F 711
1991-11-08 06:50:11 C 05 18 54.99 -26 43 05.3 801
1991-11-08 07:02:55 C 05 18 54.00 -26 43 09.6 801
1991-11-12 06:25:46 A 05 11 11.94 -27 07 58.3 808
1991-11-12 07:25:37 A 05 11 06.85 -27 08 09.6 808
1991-12-01 03:33:21 A 04 36 02.15 -26 22 31.1 808
1991-12-01 04:43:09 A 04 35 57.21 -26 22 06.3 808
1991-12-10 05:37:31 04 22 38.29 -24 42 52.0 F 711
1991-12-31 05:00:16 04 05 01.23 -19 13 59.5 F 711
1992-01-02 05:04:39 04 04 16.83 -18 39 23.7 F 711
1995-10-29 15:34:31 C 07 19 09.05 -07 50 56.7 413
1995-10-29 15:38:26 C 07 19 09.01 -07 50 58.5 413
1995-10-30 16:54:25 C 07 19 03.40 -08 01 26.5 413
1995-10-30 17:01:22 C 07 19 03.32 -08 01 28.6 413
1995-11-27 21:17:20 C 07 03 42.03 -11 43 33.3 z 220
1995-11-27 21:43:50 C 07 03 40.84 -11 43 39.9 z 220
1998-02-21 00:26:36 C 11 26 23.19 +01 01 44.3 557
1998-02-21 17:44:45 C 11 25 45.57 +01 08 36.5 360
1998-02-21 17:51:59 C 11 25 45.36 +01 08 39.2 360
1998-03-24 09:58:29 C 10 54 47.53 +06 46 58.1 t 566
1998-03-24 10:12:49 C 10 54 46.89 +06 47 04.2 t 566
1998-03-24 10:27:27 C 10 54 46.27 +06 47 11.8 t 566
1998-03-26 03:15:15 C 10 53 04.82 +07 06 09.7 19.4 a 704
1998-03-26 03:44:46 C 10 53 03.62 +07 06 23.5 19.7 a 704
1998-03-26 04:13:49 C 10 53 02.42 +07 06 37.3 19.5 a 704
1998-03-29 04:17:54 C 10 50 07.85 +07 39 27.5 19.6 a 704
1998-03-29 04:46:50 C 10 50 06.79 +07 39 41.2 20.3 a 704
1998-03-29 05:15:53 C 10 50 05.51 +07 39 55.0 20.1 a 704
1998-03-29 05:44:45 C 10 50 04.47 +07 40 08.8 19.5 a 704
1998-04-15 03:15:26 C 10 36 38.86 +10 22 47.6 19.4 a 704
1998-04-15 03:27:12 C 10 36 38.56 +10 22 52.2 19.4 a 704
1998-04-15 03:38:56 C 10 36 38.25 +10 22 56.8 19.4 a 704
1998-04-15 04:02:21 C 10 36 37.49 +10 23 06.0 20.3 a 704
1998-04-23 03:25:43 c 10 32 30.56 +11 23 00.3 i 691
1998-04-23 03:56:53 c 10 32 29.99 +11 23 09.3 i 691
1998-04-23 04:27:46 c 10 32 29.42 +11 23 18.3 i 691
2002-01-13 11:30:10 C 12 52 21.90 -03 31 03.2 m 333
2002-01-13 11:50:51 C 12 52 22.34 -03 31 02.1 m 333
2002-01-13 12:11:27 C 12 52 22.87 -03 30 59.6 m 333
2002-02-07 10:59:51 C 13 01 09.76 -01 45 46.9 18.8 c 704
2002-02-07 11:21:36 C 13 01 09.81 -01 45 40.1 19.6 c 704