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
2014-11-27 13:21:35 C 10 12 32.211 +10 20 55.00 L F51
2014-11-27 13:40:21 C 10 12 32.711 +10 20 53.44 L F51
2014-11-27 13:59:00 C 10 12 33.204 +10 20 51.91 L F51
2014-11-27 14:17:43 C 10 12 33.698 +10 20 50.37 L F51
2014-11-29 13:18:30 C 10 13 48.671 +10 17 07.78 L F51
2014-11-29 13:56:02 C 10 13 49.605 +10 17 05.07 L F51
2014-11-29 14:14:45 C 10 13 50.070 +10 17 03.71 L F51
2014-12-07 09:22:12 C 10 18 02.88 +10 07 16.2 u H21
2014-12-07 09:24:55 C 10 18 02.92 +10 07 16.3 u H21
2014-12-07 09:27:39 C 10 18 02.98 +10 07 16.3 u H21
2014-12-07 09:30:22 C 10 18 03.03 +10 07 16.2 u H21
2014-12-07 09:33:06 C 10 18 03.08 +10 07 16.0 u H21
2014-12-07 09:35:50 C 10 18 03.12 +10 07 16.0 u H21
2014-12-07 09:39:14 C 10 18 03.19 +10 07 15.9 u H21
2014-12-07 11:22:57 C 10 18 05.08 +10 07 12.9 u H21
2014-12-07 11:25:31 C 10 18 05.13 +10 07 12.7 u H21
2014-12-07 11:28:05 C 10 18 05.18 +10 07 12.7 u H21
2014-12-07 11:30:37 C 10 18 05.23 +10 07 12.6 u H21
2014-12-07 11:33:10 C 10 18 05.27 +10 07 12.4 u H21
2014-12-07 11:35:43 C 10 18 05.33 +10 07 12.2 u H21
2014-12-07 11:38:16 C 10 18 05.36 +10 07 11.9 u H21
2014-12-07 11:40:49 C 10 18 05.42 +10 07 11.8 u H21
2014-12-07 11:43:29 C 10 18 05.47 +10 07 11.9 u H21
2014-12-27 01:43:14 C 10 22 24.72 +10 25 33.2 q 160
2014-12-27 01:44:56 C 10 22 24.72 +10 25 33.1 q 160
2014-12-27 01:46:38 C 10 22 24.72 +10 25 33.0 q 160
2014-12-27 10:52:07 C 10 22 23.67 +10 26 37.1 R G45
2014-12-27 10:58:05 C 10 22 23.65 +10 26 37.5 R G45
2014-12-27 11:04:56 C 10 22 23.62 +10 26 38.3 R G45
2014-12-27 11:10:53 C 10 22 23.59 +10 26 39.0 R G45
2014-12-27 11:13:54 C 10 22 23.59 +10 26 39.4 R G45
2014-12-27 11:19:52 C 10 22 23.58 +10 26 39.9 R G45
2014-12-30 02:45:23 C 10 22 09.41 +10 34 48.9 q Z81
2014-12-30 03:12:07 C 10 22 09.24 +10 34 52.7 q Z81
2014-12-30 03:25:56 C 10 22 09.06 +10 34 54.2 q 160
2014-12-30 03:27:36 C 10 22 09.05 +10 34 54.4 q 160
2014-12-30 03:29:16 C 10 22 09.03 +10 34 54.3 q 160
2014-12-30 03:40:41 C 10 22 09.05 +10 34 56.8 q Z81
2014-12-31 01:43:07 C 10 22 01.27 +10 38 06.7 q Z81
2014-12-31 02:00:33 C 10 22 01.15 +10 38 09.2 q Z81
2014-12-31 02:18:32 C 10 22 01.00 +10 38 11.9 q Z81
2015-01-01 02:18:23 C 10 21 50.56 +10 41 50.4 q 160
2015-01-01 02:21:54 C 10 21 50.51 +10 41 52.0 q 160
2015-01-02 03:35:14 C 10 21 37.68 +10 45 54.8 q 160
2015-01-02 03:37:10 C 10 21 37.66 +10 45 55.0 q 160
2015-01-02 03:39:08 C 10 21 37.63 +10 45 55.4 q 160
2015-01-05 01:23:19 C 10 20 51.88 +10 58 19.5 q 160
2015-01-05 01:25:20 C 10 20 51.84 +10 58 19.8 q 160
2015-01-05 01:27:20 C 10 20 51.81 +10 58 20.6 q 160
2015-01-06 01:46:43 C 10 20 32.15 +11 03 05.0 q 160
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)