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
2010-01-16 09:03:10 C 10 53 02.44 +09 46 50.0 c 704
2010-01-16 09:21:10 C 10 53 02.05 +09 46 55.7 c 704
2010-01-17 08:07:47 C 10 52 41.40 +09 52 38.4 c 704
2010-01-17 08:26:07 C 10 52 41.06 +09 52 44.0 c 704
2010-01-17 08:44:17 C 10 52 40.71 +09 52 48.8 c 704
2010-01-17 09:02:32 C 10 52 40.46 +09 52 53.5 c 704
2010-01-17 09:20:39 C 10 52 40.08 +09 52 58.9 c 704
2010-01-18 23:52:50 C 10 52 00.85 +10 03 09.4 u B67
2010-01-19 00:06:23 C 10 52 00.59 +10 03 13.0 u B67
2010-01-19 00:19:40 C 10 52 00.35 +10 03 16.8 u B67
2010-01-22 00:52:22 C 10 50 32.80 +10 24 05.1 r J75
2010-01-22 01:13:41 C 10 50 32.30 +10 24 11.7 r J75
2010-01-22 01:34:52 C 10 50 31.81 +10 24 18.0 r J75
2010-01-22 02:08:31 C 10 50 30.97 +10 24 27.6 u 160
2010-01-22 02:10:45 C 10 50 30.92 +10 24 28.4 u 160
2010-01-22 02:12:55 C 10 50 30.87 +10 24 29.1 u 160
2010-02-05 09:49:56 C 10 39 42.66 +12 28 06.7 o 691
2010-02-05 10:15:23 C 10 39 41.60 +12 28 17.2 o 691
2010-02-05 10:40:48 C 10 39 40.55 +12 28 27.5 o 691
2010-02-06 08:43:26 C 10 38 47.11 +12 37 35.4 568
2010-02-06 09:04:44 C 10 38 46.22 +12 37 44.4 568
2010-02-07 11:25:40 C 10 37 40.10 +12 48 44.4 u D95
2010-02-07 11:28:45 C 10 37 39.99 +12 48 45.8 u D95
2010-02-08 03:22:06 C 10 36 58.69 +12 55 29.8 u 160
2010-02-08 03:24:16 C 10 36 58.59 +12 55 30.6 u 160
2010-02-08 03:26:28 C 10 36 58.50 +12 55 31.8 u 160
2010-02-09 04:53:19 C 10 35 52.29 +13 06 25.3 o 691
2010-02-09 05:18:48 C 10 35 51.15 +13 06 36.4 o 691
2010-02-09 05:44:16 C 10 35 49.99 +13 06 47.5 o 691
2010-02-09 08:02:41 C 10 35 43.94 +13 07 48.0 568
2010-02-09 08:24:44 C 10 35 42.94 +13 07 57.8 568
2010-02-10 12:04:44 C 10 34 28.09 +13 19 56.5 568
2010-02-10 12:24:29 C 10 34 27.15 +13 20 05.0 568
2010-02-12 21:57:36 C 10 31 46.70 +13 45 20.2 v B09
2010-02-12 22:02:48 C 10 31 46.55 +13 45 21.6 v B09
2010-02-13 06:47:32 C 10 31 21.44 +13 49 15.4 c 704
2010-02-13 07:05:08 C 10 31 20.56 +13 49 23.1 c 704
2010-02-13 07:22:45 C 10 31 19.70 +13 49 31.1 c 704
2010-02-13 07:40:20 C 10 31 18.91 +13 49 37.7 c 704
2010-02-13 07:57:56 C 10 31 17.90 +13 49 47.0 c 704
2010-02-13 08:05:57 C 10 31 17.81 +13 49 50.5 568
2010-02-13 08:25:44 C 10 31 16.85 +13 49 59.3 568
2010-02-14 13:04:08 C 10 29 53.25 +14 02 44.1 568
2010-02-14 13:30:18 C 10 29 51.94 +14 02 55.7 568
2010-02-15 06:09:25 C 10 29 03.30 +14 10 20.6 r 703
2010-02-15 06:22:32 C 10 29 02.65 +14 10 26.3 r 703
2010-02-15 06:35:49 C 10 29 01.93 +14 10 32.4 r 703
2010-02-15 06:49:17 C 10 29 01.28 +14 10 38.5 r 703
2010-02-16 06:45:39 C 10 27 49.92 +14 21 22.3 c 704
2010-02-16 07:03:31 C 10 27 48.98 +14 21 30.2 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)