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
2014-01-28 02:15:28 C 02 23 40.79 +04 58 38.7 q 703
2014-01-28 02:22:43 C 02 23 41.17 +04 58 42.1 q 703
2014-01-28 02:29:59 C 02 23 41.62 +04 58 45.4 q 703
2014-02-11 03:11:38 C 02 43 47.22 +07 40 36.8 q 703
2014-02-11 03:22:21 C 02 43 47.89 +07 40 42.2 q 703
2014-02-11 03:33:05 C 02 43 48.52 +07 40 47.0 q 703
2014-02-11 04:15:31 C 02 43 51.15 +07 41 06.1 q 703
2014-02-25 19:08:15 C 03 06 16.72 +10 15 25.8 o B67
2014-02-25 19:15:25 C 03 06 17.19 +10 15 28.8 o B67
2014-02-25 19:22:36 C 03 06 17.68 +10 15 31.9 o B67
2014-03-04 15:49:00 C 03 17 14.37 +11 22 22.3 r 168
2014-03-04 15:56:00 C 03 17 14.76 +11 22 25.2 r 168
2014-03-04 16:02:30 C 03 17 15.24 +11 22 28.1 r 168
2014-03-04 16:31:20 C 03 17 17.20 +11 22 39.0 r 168
2014-03-04 16:32:45 C 03 17 17.29 +11 22 40.2 r 168
2014-03-04 17:01:35 C 03 17 19.25 +11 22 51.3 r 168
2014-03-25 02:57:52 C 03 51 13.76 +14 19 33.3 q 703
2014-03-25 03:12:09 C 03 51 14.81 +14 19 38.2 q 703
2014-03-25 03:26:26 C 03 51 15.81 +14 19 42.6 q 703
2014-03-25 03:40:43 C 03 51 16.83 +14 19 47.5 q 703
2014-10-21 11:11:56 C 09 37 44.50 +12 36 10.4 o 691
2014-10-21 11:31:42 C 09 37 45.46 +12 36 06.5 o 691
2014-10-21 11:51:23 C 09 37 46.40 +12 36 02.7 o 691
2014-10-21 18:13:45 C 09 38 04.97 +12 34 47.5 u C15
2014-10-21 18:30:04 C 09 38 05.77 +12 34 43.5 u C15
2014-10-21 18:46:23 C 09 38 06.54 +12 34 39.9 u C15
2014-10-21 19:02:47 C 09 38 07.34 +12 34 37.5 u C15
2014-11-03 11:11:24 C 09 52 00.17 +11 38 03.7 o 691
2014-11-03 11:29:47 C 09 52 00.94 +11 38 00.5 o 691
2014-11-03 11:48:11 C 09 52 01.71 +11 37 57.5 o 691
2014-11-19 10:35:06 C 10 06 37.36 +10 40 59.2 q 703
2014-11-19 10:42:22 C 10 06 37.61 +10 40 58.3 q 703
2014-11-19 10:49:38 C 10 06 37.83 +10 40 57.3 q 703
2014-11-19 10:56:55 C 10 06 38.08 +10 40 56.6 q 703
2014-11-26 08:06:16 S 10 11 43.20 +10 23 28.3 L C51
2014-11-26 10:27:49 C 10 11 47.37 +10 23 14.5 q G96
2014-11-26 10:38:54 C 10 11 47.68 +10 23 13.5 q G96
2014-11-26 10:50:01 C 10 11 47.98 +10 23 12.5 q G96
2014-11-26 11:01:07 C 10 11 48.29 +10 23 11.5 q G96
2014-11-26 12:50:18 S 10 11 51.16 +10 23 03.9 L C51
2014-11-26 15:59:32 S 10 11 56.47 +10 22 46.3 L C51
2014-11-26 17:34:20 S 10 11 59.16 +10 22 38.9 L C51
2014-11-26 22:18:11 S 10 12 07.09 +10 22 13.2 L C51
2014-11-27 04:36:51 S 10 12 17.63 +10 21 40.5 L C51
2014-11-27 11:41:31 C 10 12 29.32 +10 21 02.6 u H21
2014-11-27 11:44:25 C 10 12 29.41 +10 21 02.5 u H21
2014-11-27 11:47:10 C 10 12 29.47 +10 21 02.3 u H21
2014-11-27 11:49:48 C 10 12 29.55 +10 21 02.0 u H21
2014-11-27 11:51:53 C 10 12 29.60 +10 21 01.7 u H21
2014-11-27 11:55:06 C 10 12 29.71 +10 21 01.2 u H21
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)