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
2007-01-27 19:09:41 C 07 17 44.69 +18 07 55.8 c A24
2007-01-27 19:11:08 C 07 17 44.63 +18 07 56.1 c A24
2007-01-27 22:49:03 C 07 17 33.67 +18 08 45.6 c A24
2007-01-27 22:50:29 C 07 17 33.60 +18 08 45.8 c A24
2007-01-27 23:21:49 C 07 17 32.03 +18 08 52.8 c A24
2007-01-27 23:53:38 C 07 17 30.43 +18 08 59.9 c A24
2007-01-28 00:24:29 C 07 17 28.87 +18 09 06.9 c A24
2007-01-28 00:25:56 C 07 17 28.81 +18 09 07.1 c A24
2007-01-28 18:31:41 C 07 16 36.30 +18 13 10.4 c A24
2007-01-28 18:33:09 C 07 16 36.24 +18 13 10.5 c A24
2007-01-28 19:00:10 C 07 16 34.90 +18 13 16.7 c A24
2007-01-28 19:12:47 C 07 16 34.30 +18 13 20.3 c A24
2007-01-28 19:13:31 C 07 16 34.27 +18 13 20.2 c A24
2007-01-28 19:14:07 C 07 16 34.22 +18 13 20.0 c A24
2007-01-28 19:14:15 C 07 16 34.28 +18 13 19.8 c A24
2007-01-28 19:28:39 C 07 16 33.51 +18 13 23.1 c A24
2007-01-28 19:55:41 C 07 16 32.19 +18 13 29.3 c A24
2007-01-28 19:57:07 C 07 16 32.10 +18 13 29.8 c A24
2007-01-29 11:55:34 C 07 15 46.04 +18 17 03.9 r 379
2007-01-29 12:01:28 C 07 15 45.77 +18 17 05.4 r 379
2007-01-29 12:13:16 C 07 15 45.17 +18 17 07.5 r 379
2007-02-01 23:09:03 C 07 11 55.84 +18 35 10.7 16.2 r 084
2007-02-01 23:12:12 C 07 11 55.71 +18 35 11.5 16.2 r 084
2007-02-03 08:25:52 C 07 10 28.74 +18 42 16.2 r H45
2007-02-03 08:28:45 C 07 10 28.58 +18 42 16.8 r H45
2007-02-03 08:29:34 C 07 10 28.53 +18 42 16.9 r H45
2007-02-03 08:34:01 C 07 10 28.36 +18 42 17.7 r H45
2007-02-03 08:35:47 C 07 10 28.25 +18 42 18.2 r H45
2007-02-04 18:04:26 C 07 09 04.24 +18 49 16.5 c 127
2007-02-04 18:13:00 C 07 09 03.87 +18 49 18.5 c 127
2007-02-04 18:44:38 C 07 09 02.56 +18 49 24.9 c 127
2007-02-04 19:54:37 C 07 08 59.68 +18 49 38.8 o A32
2007-02-04 20:27:01 C 07 08 58.30 +18 49 44.8 o A32
2007-02-04 22:19:58 C 07 08 53.50 +18 50 10.2 c A24
2007-02-04 22:21:25 C 07 08 53.41 +18 50 10.7 c A24
2007-02-04 22:35:13 C 07 08 52.86 +18 50 11.1 15.9 r B24
2007-02-04 22:36:25 C 07 08 52.79 +18 50 13.7 c A24
2007-02-04 22:45:16 C 07 08 52.40 +18 50 15.0 16.0 r B24
2007-02-04 22:52:52 C 07 08 52.09 +18 50 17.1 c A24
2007-02-04 23:07:52 C 07 08 51.46 +18 50 20.2 c A24
2007-02-04 23:09:19 C 07 08 51.40 +18 50 20.3 c A24
2007-02-04 23:24:56 C 07 08 50.74 +18 50 23.6 c A24
2007-02-04 23:41:02 C 07 08 50.05 +18 50 26.9 c A24
2007-02-04 23:56:10 C 07 08 49.39 +18 50 29.9 c A24
2007-02-04 23:57:37 C 07 08 49.34 +18 50 30.3 c A24
2007-02-05 04:22:01 C 07 08 38.84 +18 51 25.7 o 644
2007-02-05 04:51:40 C 07 08 37.59 +18 51 31.9 o 644
2007-02-05 05:23:09 C 07 08 36.27 +18 51 38.4 o 644
2007-02-05 05:24:53 C 07 08 36.20 +18 51 38.7 o 644
2007-02-05 05:54:11 C 07 08 34.96 +18 51 44.7 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)