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
2016-12-06 08:02:22 C 07 03 45.53 +13 57 45.6 R G45
2016-12-06 08:09:28 C 07 03 45.22 +13 57 46.2 R G45
2016-12-06 08:09:42 C 07 03 45.18 +13 57 46.2 R G45
2016-12-06 08:15:47 C 07 03 44.92 +13 57 46.8 R G45
2016-12-06 08:17:02 C 07 03 44.85 +13 57 46.8 R G45
2016-12-06 08:23:04 C 07 03 44.58 +13 57 47.4 R G45
2016-12-07 03:35:28 C 07 02 52.91 +13 59 19.3 q 160
2016-12-07 03:38:50 C 07 02 52.74 +13 59 19.7 q 160
2016-12-07 03:43:48 C 07 02 52.48 +13 59 20.0 q 160
2016-12-08 06:24:05 C 07 01 39.66 +14 01 38.0 R G45
2016-12-08 06:31:01 C 07 01 39.33 +14 01 38.6 R G45
2016-12-08 06:37:59 C 07 01 38.99 +14 01 39.3 R G45
2016-12-08 06:45:04 C 07 01 38.66 +14 01 39.9 R G45
2016-12-08 06:59:16 C 07 01 37.98 +14 01 41.3 R G45
2016-12-09 01:39:04 C 07 00 45.32 +14 03 21.3 q 160
2016-12-09 01:42:22 C 07 00 45.17 +14 03 21.5 q 160
2016-12-09 01:45:38 C 07 00 45.01 +14 03 21.9 q 160
2016-12-13 00:06:33 C 06 56 06.24 +14 12 49.9 q 160
2016-12-13 00:08:37 C 06 56 06.13 +14 12 50.4 q 160
2016-12-13 00:11:21 C 06 56 05.98 +14 12 50.7 q 160
2016-12-14 05:36:54 C 06 54 34.80 +14 16 07.3 u H21
2016-12-14 05:38:52 C 06 54 34.71 +14 16 07.5 u H21
2016-12-14 05:40:49 C 06 54 34.60 +14 16 07.7 u H21
2016-12-14 05:42:47 C 06 54 34.50 +14 16 07.9 u H21
2016-12-14 05:44:45 C 06 54 34.39 +14 16 08.3 u H21
2016-12-14 05:46:42 C 06 54 34.28 +14 16 08.3 u H21
2016-12-14 05:48:40 C 06 54 34.19 +14 16 08.7 u H21
2016-12-14 05:50:37 C 06 54 34.09 +14 16 08.9 u H21
2016-12-14 05:52:35 C 06 54 33.98 +14 16 09.1 u H21
2016-12-14 05:54:33 C 06 54 33.87 +14 16 09.2 u H21
2016-12-14 05:56:30 C 06 54 33.76 +14 16 09.4 u H21
2016-12-14 05:58:28 C 06 54 33.66 +14 16 09.9 u H21
2016-12-14 06:00:26 C 06 54 33.56 +14 16 10.0 u H21
2016-12-14 06:02:23 C 06 54 33.45 +14 16 10.3 u H21
2016-12-14 06:04:21 C 06 54 33.35 +14 16 10.4 u H21
2016-12-14 06:06:18 C 06 54 33.24 +14 16 10.6 u H21
2016-12-14 06:08:16 C 06 54 33.14 +14 16 10.9 u H21
2016-12-14 06:10:14 C 06 54 33.04 +14 16 11.2 u H21
2016-12-14 06:12:11 C 06 54 32.94 +14 16 11.3 u H21
2016-12-14 06:14:09 C 06 54 32.83 +14 16 11.6 u H21
2016-12-14 06:16:53 C 06 54 32.69 +14 16 11.9 u H21
2016-12-16 02:08:53 C 06 52 13.09 +14 21 20.9 q 160
2016-12-16 02:10:47 C 06 52 12.98 +14 21 21.1 q 160
2016-12-16 02:12:41 C 06 52 12.88 +14 21 21.3 q 160
2016-12-18 01:28:43 C 06 49 38.74 +14 27 15.1 q 160
2016-12-18 01:30:42 C 06 49 38.64 +14 27 15.2 q 160
2016-12-18 01:32:41 C 06 49 38.53 +14 27 15.9 q 160
2016-12-19 10:52:42 C 06 47 47.46 +14 31 37.4 u H21
2016-12-19 10:54:46 C 06 47 47.34 +14 31 37.6 u H21
2016-12-19 10:56:50 C 06 47 47.23 +14 31 37.7 u H21
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)