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
2006-12-25 23:01:04 C 07 59 13.96 +15 10 33.1 c A24
2006-12-25 23:44:25 C 07 59 11.95 +15 10 41.4 c A24
2006-12-25 23:45:51 C 07 59 11.87 +15 10 41.7 c A24
2006-12-26 01:53:40 C 07 59 05.83 +15 11 05.9 c A24
2006-12-26 01:55:05 C 07 59 05.82 +15 11 06.0 c A24
2006-12-26 21:22:41 C 07 58 12.19 +15 14 48.0 c A24
2006-12-26 21:24:10 C 07 58 12.09 +15 14 48.3 c A24
2006-12-26 22:46:50 C 07 58 08.19 +15 15 04.7 c A24
2006-12-26 23:28:09 C 07 58 06.24 +15 15 13.3 c A24
2006-12-26 23:29:38 C 07 58 06.18 +15 15 13.0 c A24
2006-12-31 06:16:35 C 07 53 07.04 +15 35 53.8 o 699
2006-12-31 06:32:12 C 07 53 06.23 +15 35 56.7 o 699
2006-12-31 06:47:37 C 07 53 05.45 +15 36 00.3 o 699
2006-12-31 07:03:02 C 07 53 04.65 +15 36 03.4 o 699
2007-01-08 10:34:14 C 07 42 45.11 +16 19 14.2 r H45
2007-01-08 10:36:36 C 07 42 44.99 +16 19 14.8 r H45
2007-01-08 10:38:21 C 07 42 44.90 +16 19 15.1 r H45
2007-01-08 10:39:52 C 07 42 44.80 +16 19 15.4 r H45
2007-01-08 10:42:50 C 07 42 44.65 +16 19 16.1 r H45
2007-01-09 11:11:15 C 07 41 24.71 +16 24 53.2 r D29
2007-01-09 12:02:57 C 07 41 21.88 +16 25 07.4 r D29
2007-01-09 12:53:48 C 07 41 19.05 +16 25 19.5 r D29
2007-01-10 08:46:15 C 07 40 13.03 +16 29 58.0 o 644
2007-01-10 09:15:37 C 07 40 11.37 +16 30 04.8 o 644
2007-01-10 09:44:58 C 07 40 09.71 +16 30 11.6 o 644
2007-01-11 10:35:01 C 07 38 47.30 +16 36 00.0 o 644
2007-01-11 11:04:22 C 07 38 45.65 +16 36 06.9 o 644
2007-01-11 11:33:43 C 07 38 44.00 +16 36 13.7 o 644
2007-01-12 21:34:09 C 07 36 51.34 +16 44 13.3 c A24
2007-01-12 21:35:36 C 07 36 51.26 +16 44 13.7 c A24
2007-01-12 22:09:11 C 07 36 49.21 +16 44 20.2 15.5 r 084
2007-01-12 22:12:20 C 07 36 49.04 +16 44 21.0 15.5 r 084
2007-01-12 22:19:17 C 07 36 48.79 +16 44 24.1 c A24
2007-01-12 22:41:07 C 07 36 47.57 +16 44 29.2 c A24
2007-01-12 22:42:35 C 07 36 47.49 +16 44 29.8 c A24
2007-01-14 06:40:15 C 07 35 01.07 +16 52 04.0 c 704
2007-01-14 06:59:01 C 07 35 00.01 +16 52 08.6 c 704
2007-01-14 07:17:44 C 07 34 58.95 +16 52 13.0 c 704
2007-01-15 06:58:45 C 07 33 40.21 +16 57 49.6 o 644
2007-01-15 07:29:51 C 07 33 38.44 +16 57 57.0 o 644
2007-01-15 07:59:39 C 07 33 36.75 +16 58 03.8 o 644
2007-01-15 13:49:42 C 07 33 17.46 +16 59 26.9 r 379
2007-01-15 13:51:28 C 07 33 17.37 +16 59 27.6 r 379
2007-01-15 13:53:13 C 07 33 17.28 +16 59 28.1 r 379
2007-01-15 13:56:45 C 07 33 17.07 +16 59 28.8 r 379
2007-01-15 13:58:29 C 07 33 16.99 +16 59 29.1 r 379
2007-01-15 14:00:15 C 07 33 16.89 +16 59 29.5 r 379
2007-01-16 06:47:56 C 07 32 21.15 +17 03 28.5 o 644
2007-01-16 07:17:17 C 07 32 19.46 +17 03 35.5 o 644
2007-01-16 07:48:23 C 07 32 17.74 +17 03 43.1 o 644
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)