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
2006-12-14 08:17:10 C 08 10 08.76 +14 26 18.9 c 704
2006-12-14 08:36:04 C 08 10 08.12 +14 26 21.0 c 704
2006-12-14 08:54:50 C 08 10 07.48 +14 26 23.5 c 704
2006-12-14 09:13:34 C 08 10 06.88 +14 26 25.8 c 704
2006-12-14 23:26:25 C 08 09 39.32 +14 28 14.4 c A24
2006-12-14 23:27:50 C 08 09 39.28 +14 28 14.5 c A24
2006-12-15 00:27:48 C 08 09 37.24 +14 28 22.6 c A24
2006-12-15 00:57:04 C 08 09 36.24 +14 28 26.7 c A24
2006-12-15 00:58:30 C 08 09 36.20 +14 28 26.7 c A24
2006-12-16 09:27:57 C 08 08 30.23 +14 32 50.9 c 704
2006-12-16 09:46:50 C 08 08 29.54 +14 32 53.3 c 704
2006-12-16 10:06:42 C 08 08 28.84 +14 32 56.4 c 704
2006-12-16 10:26:18 C 08 08 28.13 +14 32 58.9 c 704
2006-12-16 10:45:44 C 08 08 27.38 +14 33 01.8 c 704
2006-12-18 23:22:44 C 08 06 15.41 +14 41 50.6 16.3 r 084
2006-12-18 23:25:53 C 08 06 15.29 +14 41 51.1 16.3 r 084
2006-12-20 01:13:28 C 08 05 15.56 +14 45 52.4 16.2 r 084
2006-12-20 01:16:37 C 08 05 15.43 +14 45 52.9 16.1 r 084
2006-12-21 07:34:12 C 08 04 03.07 +14 50 50.4 r G96
2006-12-21 07:43:32 C 08 04 02.64 +14 50 51.3 r G96
2006-12-21 07:52:45 C 08 04 02.24 +14 50 53.0 r G96
2006-12-21 08:02:04 C 08 04 01.88 +14 50 54.5 r G96
2006-12-22 01:17:48 C 08 03 19.20 +14 53 47.1 15.8 c 224
2006-12-22 01:35:54 C 08 03 18.44 +14 53 50.2 16.0 c 224
2006-12-22 01:53:59 C 08 03 17.67 +14 53 53.4 16.1 c 224
2006-12-22 11:16:05 C 08 02 53.98 +14 55 29.6 r H45
2006-12-22 11:17:45 C 08 02 53.90 +14 55 30.0 r H45
2006-12-22 11:19:11 C 08 02 53.84 +14 55 30.1 r H45
2006-12-22 11:20:28 C 08 02 53.79 +14 55 30.3 r H45
2006-12-22 11:21:41 C 08 02 53.74 +14 55 30.5 r H45
2006-12-23 22:43:11 C 08 01 23.36 +15 01 41.3 c A24
2006-12-23 22:44:38 C 08 01 23.28 +15 01 41.7 c A24
2006-12-23 23:21:34 C 08 01 21.63 +15 01 48.4 c A24
2006-12-24 00:35:27 C 08 01 18.33 +15 02 01.8 c A24
2006-12-24 00:36:55 C 08 01 18.28 +15 02 02.1 c A24
2006-12-24 01:50:50 C 08 01 14.94 +15 02 15.4 c A24
2006-12-24 01:52:19 C 08 01 14.88 +15 02 15.5 c A24
2006-12-24 07:40:44 C 08 00 59.72 +15 03 18.9 r 703
2006-12-24 07:50:11 C 08 00 59.32 +15 03 20.8 r 703
2006-12-24 07:59:33 C 08 00 58.89 +15 03 22.5 r 703
2006-12-24 08:08:57 C 08 00 58.46 +15 03 24.0 r 703
2006-12-24 21:06:14 C 08 00 24.17 +15 05 44.8 c A24
2006-12-24 21:07:42 C 08 00 24.13 +15 05 44.5 c A24
2006-12-24 23:00:18 C 08 00 18.89 +15 06 04.5 r 084
2006-12-25 01:46:13 C 08 00 11.40 +15 06 35.9 c A24
2006-12-25 01:47:41 C 08 00 11.35 +15 06 36.3 c A24
2006-12-25 21:32:55 C 07 59 18.08 +15 10 16.4 c A24
2006-12-25 21:34:22 C 07 59 18.02 +15 10 16.9 c A24
2006-12-25 22:48:39 C 07 59 14.44 +15 10 29.4 16.2 r 084
2006-12-25 22:51:49 C 07 59 14.27 +15 10 30.0 16.3 r 084
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)