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
2009-10-23 11:55:45 C 10 00 30.13 +11 30 21.7 r 703
2009-10-23 12:01:22 C 10 00 30.45 +11 30 20.1 r 703
2009-10-23 12:06:52 C 10 00 30.70 +11 30 19.1 r 703
2009-10-23 12:12:28 C 10 00 31.03 +11 30 17.9 r 703
2009-11-13 02:57:38 C 10 23 53.93 +09 50 49.6 i 071
2009-11-13 02:59:38 C 10 23 53.98 +09 50 49.5 i 071
2009-11-13 03:01:37 C 10 23 54.09 +09 50 49.0 i 071
2009-11-13 03:03:37 C 10 23 54.16 +09 50 48.8 i 071
2009-11-13 03:09:44 C 10 23 54.43 +09 50 47.9 i 071
2009-11-13 03:19:43 C 10 23 54.82 +09 50 46.1 i 071
2009-11-13 03:23:43 C 10 23 55.03 +09 50 45.1 i 071
2009-11-15 11:09:59 C 10 26 16.18 +09 41 08.7 r 703
2009-11-15 11:18:49 C 10 26 16.54 +09 41 07.2 r 703
2009-11-15 11:27:33 C 10 26 16.90 +09 41 05.4 r 703
2009-11-15 11:36:13 C 10 26 17.23 +09 41 04.2 r 703
2009-11-17 10:47:31 C 10 28 13.61 +09 33 16.2 c 704
2009-11-17 11:05:25 C 10 28 14.28 +09 33 12.8 c 704
2009-11-17 11:23:21 C 10 28 15.04 +09 33 10.4 c 704
2009-11-17 11:41:15 C 10 28 15.75 +09 33 07.5 c 704
2009-11-17 11:59:10 C 10 28 16.46 +09 33 04.7 c 704
2009-12-12 05:45:36 C 10 47 47.18 +08 28 47.9 w B19
2009-12-12 05:49:50 C 10 47 47.25 +08 28 47.4 w B19
2009-12-12 05:54:06 C 10 47 47.35 +08 28 47.4 w B19
2009-12-13 11:08:22 C 10 48 28.68 +08 27 40.7 c 704
2009-12-13 11:26:47 C 10 48 29.11 +08 27 39.8 c 704
2009-12-13 11:45:13 C 10 48 29.58 +08 27 39.2 c 704
2009-12-13 12:05:00 C 10 48 29.97 +08 27 38.2 c 704
2009-12-13 12:23:26 C 10 48 30.37 +08 27 37.7 c 704
2009-12-16 10:43:40 C 10 50 01.77 +08 25 51.1 c 704
2009-12-16 11:02:04 C 10 50 02.17 +08 25 51.7 c 704
2009-12-16 11:20:26 C 10 50 02.49 +08 25 51.3 c 704
2009-12-16 11:39:27 C 10 50 02.92 +08 25 51.6 c 704
2009-12-16 11:57:52 C 10 50 03.30 +08 25 50.5 c 704
2009-12-19 11:21:40 C 10 51 24.44 +08 25 30.9 r G96
2009-12-19 11:30:57 C 10 51 24.62 +08 25 31.0 r G96
2009-12-19 11:40:16 C 10 51 24.76 +08 25 31.0 r G96
2009-12-19 11:49:27 C 10 51 24.91 +08 25 31.0 r G96
2010-01-10 09:31:55 C 10 54 34.31 +09 15 16.0 c 704
2010-01-10 10:08:50 C 10 54 33.96 +09 15 24.4 c 704
2010-01-12 09:21:55 C 10 54 11.15 +09 24 51.9 c 704
2010-01-12 09:39:51 C 10 54 10.95 +09 24 57.0 c 704
2010-01-12 09:57:48 C 10 54 10.79 +09 25 01.9 c 704
2010-01-12 10:15:45 C 10 54 10.54 +09 25 04.9 c 704
2010-01-12 10:34:09 C 10 54 10.28 +09 25 10.4 c 704
2010-01-15 09:33:47 C 10 53 22.04 +09 41 06.3 r 683
2010-01-15 09:53:19 C 10 53 21.75 +09 41 10.1 r 683
2010-01-15 10:12:49 C 10 53 21.48 +09 41 14.9 r 683
2010-01-16 08:08:26 C 10 53 03.30 +09 46 35.1 c 704
2010-01-16 08:26:24 C 10 53 03.00 +09 46 40.7 c 704
2010-01-16 08:45:00 C 10 53 02.69 +09 46 45.4 c 704
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)