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
2005-03-06 15:06:54 C 10 56 02.11 +14 52 30.3 r 379
2005-03-07 15:12:16 C 10 54 44.38 +15 04 09.1 r 379
2005-03-07 15:19:55 C 10 54 43.95 +15 04 13.0 r 379
2005-03-07 15:21:28 C 10 54 43.88 +15 04 13.8 r 379
2005-03-08 03:57:22 C 10 54 03.58 +15 10 16.4 o 699
2005-03-08 04:25:24 C 10 54 02.00 +15 10 29.6 o 699
2005-03-08 04:53:26 C 10 54 00.47 +15 10 43.2 o 699
2005-03-09 04:04:40 C 10 52 45.52 +15 21 45.1 o 699
2005-03-09 04:32:40 C 10 52 43.97 +15 21 58.5 o 699
2005-03-09 05:00:40 C 10 52 42.43 +15 22 11.6 o 699
2005-03-09 05:28:40 C 10 52 40.88 +15 22 24.9 o 699
2005-03-09 06:53:44 C 10 52 36.11 +15 23 05.1 c 704
2005-03-09 07:11:21 C 10 52 35.15 +15 23 13.4 c 704
2005-03-09 07:30:00 C 10 52 34.09 +15 23 22.1 c 704
2005-03-09 07:47:35 C 10 52 33.12 +15 23 30.4 c 704
2005-03-09 08:05:25 C 10 52 32.12 +15 23 38.9 c 704
2005-03-09 23:07:49 C 10 51 43.52 +15 30 40.4 o 084
2005-03-09 23:10:27 C 10 51 43.35 +15 30 41.7 o 084
2005-03-11 00:09:26 C 10 50 22.58 +15 42 18.9 o 084
2005-03-11 00:12:05 C 10 50 22.39 +15 42 20.2 o 084
2005-03-11 07:00:05 C 10 50 00.68 +15 45 31.0 o 699
2005-03-11 07:23:30 C 10 49 59.40 +15 45 41.8 o 699
2005-03-11 07:46:57 C 10 49 58.07 +15 45 52.7 o 699
2005-03-11 08:10:21 C 10 49 56.77 +15 46 03.3 o 699
2005-03-12 21:29:46 C 10 47 56.82 +16 02 56.0 o 084
2005-03-12 21:32:24 C 10 47 56.68 +16 02 57.2 o 084
2005-03-13 14:53:19 C 10 47 01.15 +16 10 42.4 r 379
2005-03-13 14:59:27 C 10 47 00.82 +16 10 45.2 r 379
2005-03-13 15:00:58 C 10 47 00.74 +16 10 46.0 r 379
2005-03-13 15:04:02 C 10 47 00.56 +16 10 47.4 r 379
2005-03-14 22:21:42 C 10 45 21.21 +16 24 23.8 o 084
2005-03-14 22:25:21 C 10 45 20.98 +16 24 25.4 o 084
2005-03-15 20:50:15 C 10 44 10.65 +16 34 00.5 r A30
2005-03-15 20:51:16 C 10 44 10.60 +16 34 01.0 r A30
2005-03-15 20:54:15 C 10 44 10.44 +16 34 02.2 r A30
2005-03-15 20:57:27 C 10 44 10.27 +16 34 03.6 r A30
2005-03-15 20:58:31 C 10 44 10.21 +16 34 04.1 r A30
2005-03-15 22:20:10 C 10 44 05.73 +16 34 37.3 o 084
2005-03-15 22:23:48 C 10 44 05.52 +16 34 38.6 o 084
2005-03-16 05:34:41 C 10 43 43.19 +16 37 42.4 c 704
2005-03-16 05:50:49 C 10 43 42.32 +16 37 49.2 c 704
2005-03-16 06:09:01 C 10 43 41.34 +16 37 56.6 c 704
2005-03-16 06:25:08 C 10 43 40.47 +16 38 03.4 c 704
2005-03-16 06:41:19 C 10 43 39.63 +16 38 10.4 c 704
2005-03-16 06:49:26 C 10 43 39.22 +16 38 14.1 r 703
2005-03-16 07:01:45 C 10 43 38.55 +16 38 19.4 r 703
2005-03-16 07:14:05 C 10 43 37.89 +16 38 24.4 r 703
2005-03-16 07:26:23 C 10 43 37.22 +16 38 29.6 r 703
2005-03-16 19:26:30 C 10 43 00.22 +16 43 27.5 c 127
2005-03-16 19:34:38 C 10 42 59.80 +16 43 31.0 c 127
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)