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
2002-02-23 04:39:16 C 07 29 26.09 +20 18 04.0 17.0 c 704
2002-02-23 04:59:51 C 07 29 25.51 +20 18 07.3 16.9 c 704
2002-02-23 05:20:07 C 07 29 24.96 +20 18 10.7 16.8 c 704
2002-02-28 09:06:44 C 07 26 33.19 +20 38 41.5 17.3 c 608
2002-02-28 09:21:55 C 07 26 32.89 +20 38 43.7 17.2 c 608
2002-02-28 09:36:50 C 07 26 32.58 +20 38 46.1 17.1 c 608
2002-03-02 04:13:13 C 07 25 45.895 +20 45 11.33 g 689
2002-03-04 19:11:00 C 07 24 48.25 +20 54 09.6 610
2002-03-04 19:16:59 C 07 24 48.16 +20 54 10.5 610
2002-03-04 19:23:00 C 07 24 48.08 +20 54 11.4 610
2002-03-04 19:29:00 C 07 24 48.00 +20 54 12.3 610
2002-03-04 19:34:59 C 07 24 47.91 +20 54 13.2 610
2002-03-04 19:41:00 C 07 24 47.83 +20 54 14.0 610
2002-03-04 19:47:00 C 07 24 47.74 +20 54 14.9 610
2002-03-06 04:06:07 C 07 24 23.47 +20 58 36.1 c 704
2002-03-06 04:25:44 C 07 24 23.19 +20 58 39.3 c 704
2002-03-06 04:45:21 C 07 24 22.94 +20 58 42.7 c 704
2002-03-06 05:04:56 C 07 24 22.69 +20 58 44.7 c 704
2002-03-06 05:24:37 C 07 24 22.33 +20 58 47.2 c 704
2002-03-09 03:44:19 C 07 23 42.399 +21 07 38.92 g 689
2002-03-09 04:15:27 C 07 23 42.20 +21 07 41.8 17.5 c 704
2002-03-09 04:34:34 C 07 23 42.07 +21 07 45.9 19.2 c 704
2002-03-09 04:54:48 C 07 23 41.84 +21 07 49.1 19.3 c 704
2002-03-09 05:14:42 C 07 23 41.70 +21 07 52.1 18.7 c 704
2002-03-09 05:33:58 C 07 23 41.42 +21 07 54.5 17.9 c 704
2002-03-10 19:14:59 C 07 23 27.46 +21 12 17.0 610
2002-03-10 19:20:00 C 07 23 27.44 +21 12 17.2 610
2002-03-10 19:25:00 C 07 23 27.42 +21 12 17.5 610
2002-03-10 19:30:00 C 07 23 27.40 +21 12 17.7 610
2002-03-10 19:34:59 C 07 23 27.38 +21 12 18.0 610
2002-03-19 08:31:09 C 07 23 31.37 +21 32 30.2 t 608
2002-03-19 08:46:03 C 07 23 31.44 +21 32 31.4 t 608
2002-03-19 09:01:28 C 07 23 31.51 +21 32 32.5 t 608
2002-03-21 03:47:33 C 07 23 49.48 +21 35 57.2 d 711
2002-03-21 03:53:40 C 07 23 49.48 +21 35 57.7 d 711
2002-03-21 03:59:40 C 07 23 49.58 +21 35 58.0 d 711
2002-03-21 04:05:48 C 07 23 49.60 +21 35 58.6 d 711
2002-04-17 03:13:19 C 07 38 20.98 +21 56 09.1 c 704
2002-04-17 03:32:57 C 07 38 21.63 +21 56 08.7 c 704
2002-04-17 03:52:35 C 07 38 22.29 +21 56 07.8 c 704
2002-04-17 04:12:13 C 07 38 22.97 +21 56 08.0 c 704
2002-04-17 04:32:00 C 07 38 23.67 +21 56 07.8 c 704
2003-08-04 03:53:46 C 03 53 57.15 +12 10 31.1 d 170
2003-08-04 03:54:14 C 03 53 57.20 +12 10 31.2 d 170
2003-08-04 03:55:21 C 03 53 57.31 +12 10 31.3 d 170
2003-08-23 02:52:41 C 04 31 16.78 +12 14 11.7 c 204
2003-08-23 02:54:54 C 04 31 16.93 +12 14 11.9 c 204
2003-08-23 02:58:23 C 04 31 17.17 +12 14 11.7 c 204
2003-09-03 03:02:53 C 04 48 30.09 +11 52 13.8 c 196
2003-09-03 03:25:24 C 04 48 31.40 +11 52 10.7 c 196
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)