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
2007-02-20 20:14:05 C 06 57 04.20 +20 00 27.5 c A24
2007-02-20 20:27:23 C 06 57 03.92 +20 00 30.1 c A24
2007-02-20 20:55:29 C 06 57 03.26 +20 00 34.0 c A24
2007-02-20 20:56:57 C 06 57 03.25 +20 00 34.1 c A24
2007-02-20 21:14:54 C 06 57 02.89 +20 00 37.0 c A24
2007-02-20 21:33:59 C 06 57 02.47 +20 00 40.1 c A24
2007-02-20 21:53:21 C 06 57 02.05 +20 00 43.2 c A24
2007-02-21 19:48:30 C 06 56 36.63 +20 04 12.2 r 113
2007-02-21 19:59:23 C 06 56 36.41 +20 04 13.8 r 113
2007-02-21 20:08:20 C 06 56 36.24 +20 04 15.2 r 113
2007-02-22 19:42:02 C 06 56 10.73 +20 07 56.4 c A24
2007-02-22 19:43:29 C 06 56 10.70 +20 07 56.6 c A24
2007-02-22 19:58:22 C 06 56 10.44 +20 07 58.8 c A24
2007-02-22 20:25:10 C 06 56 09.93 +20 08 03.3 c A24
2007-02-22 20:26:37 C 06 56 09.89 +20 08 03.3 c A24
2007-02-22 20:45:35 C 06 56 09.55 +20 08 06.4 c A24
2007-02-22 21:06:00 C 06 56 09.18 +20 08 09.4 c A24
2007-02-22 21:24:58 C 06 56 08.84 +20 08 12.4 c A24
2007-02-22 21:26:25 C 06 56 08.81 +20 08 12.4 c A24
2007-02-22 21:48:16 C 06 56 08.41 +20 08 15.8 c A24
2007-02-22 22:04:16 C 06 56 08.12 +20 08 18.3 c A24
2007-02-22 22:21:05 C 06 56 07.82 +20 08 20.9 c A24
2007-02-22 22:40:26 C 06 56 07.46 +20 08 23.9 c A24
2007-02-23 03:54:10 C 06 56 02.31 +20 09 13.1 c 704
2007-02-23 04:10:42 C 06 56 01.96 +20 09 15.7 c 704
2007-02-23 04:27:14 C 06 56 01.66 +20 09 18.7 c 704
2007-02-23 04:43:43 C 06 56 01.40 +20 09 21.0 c 704
2007-02-23 05:00:15 C 06 56 01.06 +20 09 23.9 c 704
2007-02-25 23:31:41 C 06 55 01.49 +20 19 17.4 16.5 r 084
2007-02-25 23:34:50 C 06 55 01.47 +20 19 17.3 16.4 r 084
2007-03-09 23:37:39 C 06 53 37.25 +20 56 10.1 r B12
2007-03-09 23:40:41 C 06 53 37.26 +20 56 10.4 r B12
2007-03-09 23:43:42 C 06 53 37.27 +20 56 10.8 r B12
2007-03-11 21:11:36 C 06 53 48.63 +21 01 07.4 c A24
2007-03-11 21:13:02 C 06 53 48.65 +21 01 07.4 c A24
2007-03-11 21:51:05 C 06 53 48.83 +21 01 11.5 c A24
2007-03-11 21:52:37 C 06 53 48.79 +21 01 11.6 c A24
2007-03-11 22:30:57 C 06 53 48.99 +21 01 15.8 c A24
2007-03-11 22:32:23 C 06 53 49.02 +21 01 15.6 c A24
2007-03-12 21:15:59 C 06 53 57.20 +21 03 38.0 c A24
2007-03-12 21:35:33 C 06 53 57.30 +21 03 40.0 c A24
2007-03-12 21:51:24 C 06 53 57.41 +21 03 41.4 c A24
2007-03-12 22:07:10 C 06 53 57.51 +21 03 43.1 c A24
2007-03-12 22:26:28 C 06 53 57.62 +21 03 45.0 c A24
2007-03-12 22:27:54 C 06 53 57.63 +21 03 44.9 c A24
2007-03-12 22:39:31 C 06 53 57.69 +21 03 46.4 c A24
2007-03-12 22:59:38 C 06 53 57.81 +21 03 48.1 c A24
2007-03-12 23:16:54 C 06 53 57.92 +21 03 49.9 c A24
2007-03-12 23:35:00 C 06 53 58.03 +21 03 51.8 c A24
2007-03-12 23:53:19 C 06 53 58.14 +21 03 53.5 c A24
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)