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
2003-10-13 11:15:20 C 05 14 39.431 +08 53 30.16 g 689
2003-10-14 11:10:29 C 05 14 25.238 +08 48 10.10 g 689
2003-10-15 18:53:39 C 05 14 02.00 +08 41 06.8 m 379
2003-10-15 18:59:43 C 05 14 01.88 +08 41 05.0 m 379
2003-10-15 19:05:46 C 05 14 01.78 +08 41 03.2 m 379
2003-10-16 11:02:42 C 05 13 48.323 +08 37 31.06 g 689
2003-10-16 23:21:29 C 05 13 37.14 +08 34 44.6 o 084
2003-10-18 10:53:29 C 05 13 00.138 +08 26 56.07 g 689
2003-10-19 00:55:46 C 05 12 43.88 +08 23 48.2 o 084
2003-10-20 00:42:52 C 05 12 14.08 +08 18 35.9 o 084
2003-10-21 09:37:50 C 05 11 28.29 +08 11 29.8 c 704
2003-10-21 09:54:38 C 05 11 27.83 +08 11 25.9 c 704
2003-10-21 10:11:43 C 05 11 27.35 +08 11 22.2 c 704
2003-10-21 10:28:27 C 05 11 26.92 +08 11 18.5 c 704
2003-10-21 10:41:06 C 05 11 26.626 +08 11 15.88 g 689
2003-10-21 10:45:23 C 05 11 26.42 +08 11 14.3 c 704
2003-10-22 17:38:51 C 05 10 38.59 +08 04 36.6 m 379
2003-10-22 17:44:57 C 05 10 38.41 +08 04 35.3 m 379
2003-10-23 16:41:49 C 05 09 59.82 +07 59 42.4 m 379
2003-10-23 16:47:54 C 05 09 59.59 +07 59 41.4 m 379
2003-10-23 16:49:56 C 05 09 59.59 +07 59 40.8 m 379
2003-10-24 07:29:15 C 05 09 33.53 +07 56 37.0 15.7 d H72
2003-10-24 07:34:25 C 05 09 33.31 +07 56 36.2 15.7 d H72
2003-10-24 07:39:35 C 05 09 33.14 +07 56 34.8 15.4 d H72
2003-10-24 07:44:44 C 05 09 33.05 +07 56 33.3 15.2 d H72
2003-10-24 21:53:43 C 05 09 06.96 +07 53 32.0 o 084
2003-10-26 16:01:19 C 05 07 43.56 +07 44 53.5 m 379
2003-10-26 16:10:25 C 05 07 43.21 +07 44 51.7 m 379
2003-10-26 16:13:28 C 05 07 43.12 +07 44 51.4 m 379
2003-10-29 16:11:02 C 05 05 01.77 +07 30 33.9 m 379
2003-10-29 16:14:04 C 05 05 01.62 +07 30 33.5 m 379
2003-10-29 16:17:05 C 05 05 01.50 +07 30 32.6 m 379
2003-10-29 16:20:08 C 05 05 01.39 +07 30 32.2 m 379
2003-11-01 07:38:28 C 05 02 20.58 +07 18 30.7 c 704
2003-11-01 07:55:46 C 05 02 19.77 +07 18 27.5 c 704
2003-11-01 08:12:55 C 05 02 19.17 +07 18 24.1 c 704
2003-11-07 09:18:04 C 04 55 11.710 +06 54 18.18 g 689
2003-11-07 14:46:31 C 04 54 54.33 +06 53 29.4 355
2003-11-07 14:49:07 C 04 54 54.20 +06 53 28.7 355
2003-11-07 14:51:50 C 04 54 54.04 +06 53 28.4 355
2003-11-07 14:53:46 C 04 54 53.93 +06 53 28.0 355
2003-11-08 02:12:12 C 04 54 16.99 +06 51 44.4 o 084
2003-11-08 09:12:34 C 04 53 54.278 +06 50 46.32 g 689
2003-11-09 13:21:57 C 04 52 20.73 +06 46 49.3 15.2 c 608
2003-11-09 13:38:18 C 04 52 19.77 +06 46 47.2 15.4 c 608
2003-11-09 13:53:35 C 04 52 18.88 +06 46 44.9 15.6 c 608
2003-11-16 08:30:13 C 04 42 40.796 +06 28 05.62 g 689
2003-11-16 15:06:57 C 04 42 16.26 +06 27 30.4 m 379
2003-11-16 15:09:25 C 04 42 16.10 +06 27 29.9 m 379
2003-11-16 15:14:24 C 04 42 15.78 +06 27 29.3 m 379
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)