1627 Ivar (1929 SH)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3973228500 ± 3.37e-09
Semi-major axis (a)1.8630580824 AU ± 4.99e-10
Inclination (i)8.45629236° ± 2.99e-07
Long. of Asc. Node (Ω)133.07459963° ± 2.39e-06
Arg. of Perihelion (ω)167.83961943° ± 2.63e-06
Mean Anomaly (M)311.46100560° ± 6.93e-07
Mean Motion (n)0.3875901077°/day ± 1.56e-10
Perihelion dist (q)1.12282254 AU ± 6.29e-09
Aphelion dist (Q)2.60329363 AU ± 6.32e-09
Orbital Period2.54296037 yr ± 1.02e-09
NGA Modelr2
A2-5.33141704e-16 ± 5.07e-16 AU/d²
Physical Parameters
H (abs. magnitude)12.79
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.120″
Uncertainty0
Orbit TypeAmor
MOID0.108765 AU
Observations Used13532
Radar Obs Used4
Gaia Obs Used222
Oppositions53
Arc Total1929-2025
First Observation Used1929-09-25
Last Observation Used2025-06-15
Observations (18178)
Date Type RA Dec Mag Band Observatory
2008-12-30 03:43:44 C 02 50 31.55 +03 49 49.7 r H53
2008-12-30 03:47:53 C 02 50 31.57 +03 49 51.3 r H53
2008-12-30 03:51:53 C 02 50 31.62 +03 49 53.0 r H53
2008-12-30 03:54:55 C 02 50 31.63 +03 49 54.2 r H53
2008-12-30 03:57:55 C 02 50 31.67 +03 49 55.0 r H53
2008-12-30 04:00:55 C 02 50 31.67 +03 49 56.4 r H53
2008-12-30 04:32:34 C 02 50 31.97 +03 50 08.2 c 704
2008-12-30 04:49:56 C 02 50 32.08 +03 50 15.4 c 704
2008-12-30 05:06:59 C 02 50 32.23 +03 50 21.3 c 704
2008-12-30 05:24:06 C 02 50 32.34 +03 50 28.0 c 704
2008-12-30 05:41:10 C 02 50 32.45 +03 50 35.8 c 704
2009-01-02 23:26:20 C 02 51 29.49 +04 24 39.4 o J93
2009-01-02 23:28:24 C 02 51 29.52 +04 24 40.3 o J93
2009-01-02 23:30:27 C 02 51 29.60 +04 24 41.6 o J93
2009-01-07 17:03:29 C 02 53 18.05 +05 08 42.8 16.8 r 084
2009-01-07 22:16:35 C 02 53 23.72 +05 10 45.9 16.4 r 084
2009-01-09 01:04:21 C 02 53 55.39 +05 21 16.4 r H53
2009-01-09 01:08:21 C 02 53 55.45 +05 21 17.9 r H53
2009-01-09 01:12:21 C 02 53 55.53 +05 21 19.5 r H53
2009-01-09 01:17:30 C 02 53 55.65 +05 21 21.1 r H53
2009-01-09 01:20:30 C 02 53 55.61 +05 21 23.4 r H53
2009-01-09 01:24:30 C 02 53 55.82 +05 21 23.9 r H53
2009-01-09 18:06:44 C 02 54 16.27 +05 27 57.0 16.0 r C20
2009-01-09 18:08:50 C 02 54 16.32 +05 27 58.0 16.1 r C20
2009-01-14 02:20:11 C 02 56 41.72 +06 09 03.1 r H53
2009-01-14 02:24:17 C 02 56 41.84 +06 09 05.1 r H53
2009-01-14 02:27:22 C 02 56 41.88 +06 09 06.0 r H53
2009-01-14 02:32:02 C 02 56 42.00 +06 09 07.5 r H53
2009-01-14 02:34:35 C 02 56 41.95 +06 09 09.3 r H53
2009-01-14 02:37:34 C 02 56 42.10 +06 09 10.3 r H53
2009-01-16 01:39:45 C 02 57 56.87 +06 27 46.6 r H53
2009-01-16 01:42:46 C 02 57 56.94 +06 27 47.5 r H53
2009-01-16 01:45:46 C 02 57 57.04 +06 27 48.7 r H53
2009-01-16 01:48:45 C 02 57 57.11 +06 27 50.2 r H53
2009-01-16 01:51:46 C 02 57 57.18 +06 27 51.6 r H53
2009-01-16 01:54:46 C 02 57 57.25 +06 27 51.9 r H53
2009-01-16 01:59:25 C 02 57 57.38 +06 27 54.5 o H47
2009-01-16 02:11:23 C 02 57 57.70 +06 27 59.3 o H47
2009-01-16 02:23:59 C 02 57 57.99 +06 28 04.6 o H47
2009-01-16 15:51:48 C 02 58 20.51 +06 33 23.4 16.4 o C20
2009-01-16 15:53:55 C 02 58 20.57 +06 33 24.2 16.4 o C20
2009-01-17 20:33:28 C 02 59 09.54 +06 44 44.8 v 204
2009-01-17 23:15:00 C 02 59 14.13 +06 45 48.5 v 204
2009-01-19 03:21:41 C 03 00 04.46 +06 56 58.5 c 704
2009-01-19 03:38:52 C 03 00 04.96 +06 57 05.4 c 704
2009-01-19 03:55:54 C 03 00 05.46 +06 57 12.1 c 704
2009-01-20 03:29:07 C 03 00 48.96 +07 06 29.9 c 704
2009-01-20 03:47:19 C 03 00 49.46 +07 06 36.0 c 704
2009-01-20 04:42:11 C 03 00 51.22 +07 07 00.6 c 704
2009-01-22 16:07:58 C 03 02 46.70 +07 30 28.8 17.1 r C20
Radar Observations (6)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1985-07-08 08:00:00 20560 6 Hz 2380 -1 -1
1985-07-08.333333 2056000 600 Hz 2380 251 251
1985-07-09 08:09:00 202574571 16 us 2380 -1 -1
1985-07-09.339583 20257457100 16000 us 2380 251 251
2013-06-27 09:40:00 323904701.64 5 us 2380 -1 -1
2013-07-04 09:14:00 321083718.18 5 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)