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
2006-10-03 10:52:14 C 07 50 22.40 +15 39 14.5 c 704
2006-10-03 11:10:26 C 07 50 23.25 +15 39 12.1 c 704
2006-10-22 10:06:54 C 08 07 54.52 +14 41 04.0 c 704
2006-10-22 10:27:51 C 08 07 55.15 +14 41 02.6 c 704
2006-10-22 10:47:59 C 08 07 55.69 +14 40 59.8 c 704
2006-10-22 11:11:06 C 08 07 56.36 +14 40 57.3 c 704
2006-10-22 11:27:50 C 08 07 56.93 +14 40 54.7 c 704
2006-10-27 10:17:46 C 08 11 21.12 +14 28 05.8 c 704
2006-10-27 10:35:27 C 08 11 21.59 +14 28 04.5 c 704
2006-10-27 10:53:32 C 08 11 22.05 +14 28 03.3 c 704
2006-10-27 11:10:49 C 08 11 22.51 +14 28 01.0 c 704
2006-10-27 11:27:54 C 08 11 22.96 +14 27 59.2 c 704
2006-11-02 09:01:19 C 08 14 42.31 +14 14 47.8 c 704
2006-11-02 09:53:01 C 08 14 43.40 +14 14 44.0 c 704
2006-11-02 10:10:17 C 08 14 43.77 +14 14 42.1 c 704
2006-11-05 12:37:54 C 08 16 08.16 +14 08 49.4 o 644
2006-11-05 12:53:23 C 08 16 08.40 +14 08 48.3 o 644
2006-11-05 13:08:50 C 08 16 08.66 +14 08 47.2 o 644
2006-11-21 05:28:01 C 08 19 17.79 +13 53 09.6 o 493
2006-11-23 00:29:00 C 08 19 12.13 +13 53 09.1 o 493
2006-11-23 01:00:27 C 08 19 12.00 +13 53 09.2 o 493
2006-11-23 01:30:23 C 08 19 11.87 +13 53 09.5 o 493
2006-11-24 00:36:11 C 08 19 06.33 +13 53 20.5 o 493
2006-11-24 01:06:00 C 08 19 06.03 +13 53 19.8 o 493
2006-11-24 01:28:25 C 08 19 05.89 +13 53 20.2 o 493
2006-11-24 11:39:20 C 08 19 02.65 +13 53 27.0 o 644
2006-11-24 11:54:48 C 08 19 02.54 +13 53 27.0 o 644
2006-11-24 12:22:15 C 08 19 02.37 +13 53 27.3 o 644
2006-11-28 09:18:42 C 08 18 18.31 +13 55 35.6 c 704
2006-11-28 09:37:23 C 08 18 18.01 +13 55 35.4 c 704
2006-11-28 09:56:03 C 08 18 17.71 +13 55 33.9 c 704
2006-11-28 10:14:45 C 08 18 17.58 +13 55 38.2 c 704
2006-11-28 10:33:48 C 08 18 17.19 +13 55 39.2 c 704
2006-12-12 09:37:05 C 08 11 34.76 +14 20 38.2 r 703
2006-12-12 09:46:37 C 08 11 34.47 +14 20 39.1 r 703
2006-12-12 09:56:12 C 08 11 34.18 +14 20 40.2 r 703
2006-12-12 10:05:49 C 08 11 33.86 +14 20 41.7 r 703
2006-12-13 07:57:57 C 08 10 54.50 +14 23 17.5 c 704
2006-12-13 08:16:37 C 08 10 53.92 +14 23 19.6 c 704
2006-12-13 08:35:07 C 08 10 53.34 +14 23 22.2 c 704
2006-12-13 08:53:37 C 08 10 52.84 +14 23 24.9 c 704
2006-12-13 09:12:16 C 08 10 52.14 +14 23 27.2 c 704
2006-12-13 09:24:08 C 08 10 51.72 +14 23 27.3 r H45
2006-12-13 09:25:44 C 08 10 51.66 +14 23 27.5 r H45
2006-12-13 09:30:47 C 08 10 51.51 +14 23 28.1 r H45
2006-12-13 09:33:29 C 08 10 51.41 +14 23 28.5 r H45
2006-12-13 21:42:08 C 08 10 29.08 +14 24 57.2 c A24
2006-12-13 23:23:39 C 08 10 25.77 +14 25 10.0 c A24
2006-12-13 23:25:04 C 08 10 25.72 +14 25 10.3 c A24
2006-12-14 07:58:34 C 08 10 09.45 +14 26 16.2 c 704
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)