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
2010-02-16 07:21:01 C 10 27 48.09 +14 21 37.9 c 704
2010-02-16 07:38:29 C 10 27 47.20 +14 21 45.8 c 704
2010-02-16 07:56:01 C 10 27 46.29 +14 21 53.9 c 704
2010-02-19 06:42:21 C 10 24 10.30 +14 53 39.9 c 704
2010-02-19 06:59:43 C 10 24 09.36 +14 53 47.9 c 704
2010-02-19 07:17:06 C 10 24 08.44 +14 53 55.6 c 704
2010-02-19 07:34:31 C 10 24 07.51 +14 54 03.7 c 704
2010-02-19 07:51:55 C 10 24 06.58 +14 54 11.3 c 704
2010-03-05 05:37:44 C 10 06 30.16 +17 17 05.8 r 703
2010-03-05 05:46:44 C 10 06 29.70 +17 17 09.3 r 703
2010-03-05 05:55:48 C 10 06 29.19 +17 17 13.1 r 703
2010-03-05 06:04:52 C 10 06 28.72 +17 17 16.6 r 703
2010-03-06 23:49:31 C 10 04 20.00 +17 33 24.4 w J93
2010-03-06 23:55:37 C 10 04 19.69 +17 33 26.9 w J93
2010-03-07 00:01:42 C 10 04 19.37 +17 33 29.0 w J93
2010-03-07 05:05:02 C 10 04 04.02 +17 35 26.0 r H53
2010-03-07 05:10:05 C 10 04 03.75 +17 35 27.9 r H53
2010-03-07 05:15:06 C 10 04 03.49 +17 35 30.0 r H53
2010-03-07 05:20:05 C 10 04 03.22 +17 35 31.6 r H53
2010-03-07 05:25:05 C 10 04 02.96 +17 35 33.7 r H53
2010-03-07 05:30:06 C 10 04 02.68 +17 35 35.3 r H53
2010-03-08 10:26:31 C 10 02 35.46 +17 46 25.5 u D95
2010-03-08 10:28:37 C 10 02 35.33 +17 46 25.9 u D95
2010-03-08 10:30:42 C 10 02 35.21 +17 46 27.0 u D95
2010-03-08 10:32:45 C 10 02 35.13 +17 46 27.7 u D95
2010-03-11 13:13:09 C 09 58 55.46 +18 13 15.1 o D96
2010-03-11 13:35:31 C 09 58 54.47 +18 13 23.9 o D96
2010-03-11 13:55:24 C 09 58 53.42 +18 13 30.2 o D96
2010-03-12 21:30:06 C 09 57 24.16 +18 24 02.2 v 204
2010-03-12 21:49:30 C 09 57 23.12 +18 24 07.3 15.8 u 084
2010-03-12 21:52:41 C 09 57 22.98 +18 24 08.2 15.8 u 084
2010-03-12 23:09:48 C 09 57 19.37 +18 24 35.2 v 204
2010-03-12 23:49:42 C 09 57 17.45 +18 24 46.1 15.6 o 084
2010-03-12 23:52:51 C 09 57 17.28 +18 24 47.9 15.9 o 084
2010-03-13 00:52:17 C 09 57 14.49 +18 25 08.8 v 204
2010-03-13 02:05:55 C 09 57 11.03 +18 25 31.2 15.7 u 084
2010-03-13 02:09:05 C 09 57 10.89 +18 25 32.0 15.8 u 084
2010-03-13 05:26:57 C 09 57 02.01 +18 26 41.5 c 704
2010-03-13 05:43:01 C 09 57 01.25 +18 26 46.7 c 704
2010-03-13 05:59:05 C 09 57 00.50 +18 26 52.1 c 704
2010-03-13 06:15:08 C 09 56 59.70 +18 26 57.7 c 704
2010-03-13 06:31:14 C 09 56 58.93 +18 27 02.6 c 704
2010-03-14 00:37:03 C 09 56 08.92 +18 32 53.5 u 160
2010-03-14 00:39:16 C 09 56 08.82 +18 32 54.0 u 160
2010-03-14 00:41:27 C 09 56 08.72 +18 32 54.7 u 160
2010-03-14 20:45:21 C 09 55 14.70 +18 39 16.7 w J93
2010-03-14 20:48:23 C 09 55 14.58 +18 39 17.2 w J93
2010-03-14 20:51:26 C 09 55 14.43 +18 39 18.3 w J93
2010-03-15 20:38:27 C 09 54 11.17 +18 46 38.6 15.8 u 084
2010-03-15 20:41:37 C 09 54 11.01 +18 46 39.9 15.8 o 084
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)