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
2018-06-03 21:07:36 C 14 41 58.61 +14 26 24.5 q K73
2018-06-04 09:54:48 C 14 41 34.88 +14 25 26.5 U T08
2018-06-04 10:11:00 C 14 41 34.30 +14 25 24.7 U T08
2018-06-04 10:12:36 C 14 41 34.25 +14 25 24.7 U T08
2018-06-04 10:27:27 C 14 41 33.71 +14 25 22.9 U T08
2018-06-04 10:28:07 C 14 41 33.69 +14 25 22.9 U T08
2018-06-04 10:43:27 C 14 41 33.16 +14 25 21.3 U T08
2018-06-04 10:45:00 C 14 41 33.09 +14 25 21.1 U T08
2018-06-04 11:02:04 C 14 41 32.50 +14 25 19.3 U T08
2018-06-04 16:13:59 C 14 41 23.72 +14 24 43.1 U G26
2018-06-04 16:43:05 C 14 41 22.71 +14 24 39.8 U G26
2018-06-04 17:12:02 C 14 41 21.72 +14 24 36.4 U G26
2018-06-04 20:56:36 C 14 41 16.20 +14 24 07.4 q C23
2018-06-04 21:00:17 C 14 41 16.08 +14 24 07.2 q C23
2018-06-04 21:03:28 C 14 41 15.98 +14 24 06.7 q C23
2018-06-05 10:35:25 C 14 40 51.75 +14 22 39.8 U T05
2018-06-05 10:41:32 C 14 40 51.54 +14 22 39.0 U T05
2018-06-05 10:54:05 C 14 40 51.12 +14 22 37.1 U T05
2018-06-05 11:03:11 C 14 40 50.82 +14 22 35.8 U T05
2018-06-06 09:55:36 C 14 40 13.69 +14 19 16.4 U T05
2018-06-06 10:12:10 C 14 40 13.16 +14 19 13.5 U T05
2018-06-06 10:28:53 C 14 40 12.62 +14 19 10.6 U T05
2018-06-06 10:45:03 C 14 40 12.11 +14 19 07.7 U T05
2018-06-07 06:56:41 C 14 39 41.26 +14 15 29.1 U 703
2018-06-07 07:04:13 C 14 39 41.05 +14 15 27.4 U 703
2018-06-07 07:11:45 C 14 39 40.81 +14 15 25.8 U 703
2018-06-07 07:19:17 C 14 39 40.58 +14 15 24.4 U 703
2018-06-07 22:23:17 C 14 39 19.06 +14 12 11.7 12.8 r 238
2018-06-07 22:32:51 C 14 39 18.79 +14 12 09.9 12.8 r 238
2018-06-07 22:41:51 C 14 39 18.54 +14 12 08.3 12.8 r 238
2018-06-08 10:02:02 C 14 39 02.24 +14 09 51.3 U T08
2018-06-08 10:17:45 C 14 39 01.79 +14 09 47.6 U T08
2018-06-08 10:33:56 C 14 39 01.32 +14 09 43.6 U T08
2018-06-08 10:49:28 C 14 39 00.88 +14 09 39.9 U T08
2018-06-10 06:24:15 C 14 38 06.27 +13 58 12.2 U 703
2018-06-10 06:31:53 C 14 38 06.09 +13 58 10.1 U 703
2018-06-10 06:39:30 C 14 38 05.91 +13 58 07.8 U 703
2018-06-10 06:47:07 C 14 38 05.70 +13 58 05.2 U 703
2018-06-10 09:56:19 C 14 38 01.96 +13 57 14.1 U T05
2018-06-10 10:12:56 C 14 38 01.57 +13 57 08.9 U T05
2018-06-10 10:29:53 C 14 38 01.14 +13 57 03.6 U T05
2018-06-10 10:46:18 C 14 38 00.75 +13 56 58.6 U T05
2018-06-10 21:26:53 C 14 37 49.67 +13 53 38.0 z L34
2018-06-10 21:54:17 C 14 37 48.99 +13 53 27.1 q K73
2018-06-10 21:54:17 C 14 37 48.98 +13 53 27.3 q K73
2018-06-10 22:00:33 C 14 37 48.83 +13 53 25.1 q K73
2018-06-10 22:06:43 C 14 37 48.69 +13 53 23.2 q K73
2018-06-10 22:06:43 C 14 37 48.68 +13 53 23.3 q K73
2018-06-10 22:12:44 C 14 37 48.56 +13 53 21.2 q K73
2018-06-10 22:33:11 C 14 37 48.08 +13 53 16.1 z L34
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)