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
2013-12-29 15:06:06 C 01 47 59.84 -01 15 54.9 o C41
2013-12-29 15:07:33 C 01 47 59.91 -01 15 54.0 o C41
2013-12-29 15:49:32 C 01 48 01.65 -01 15 30.6 o C41
2013-12-29 15:51:00 C 01 48 01.71 -01 15 29.7 o C41
2013-12-31 10:04:45 C 01 49 50.24 -00 52 08.0 q D29
2013-12-31 10:31:57 C 01 49 51.37 -00 51 52.9 q D29
2013-12-31 10:59:09 C 01 49 52.52 -00 51 38.0 q D29
2014-01-06 18:56:12 C 01 56 46.77 +00 31 35.0 18.2 t K49
2014-01-06 20:33:00 C 01 56 51.28 +00 32 27.3 19.1 t K49
2014-01-07 03:22:58 C 01 57 10.79 +00 36 11.1 q 703
2014-01-07 03:35:34 C 01 57 11.38 +00 36 18.0 q 703
2014-01-07 03:48:08 C 01 57 11.97 +00 36 24.4 q 703
2014-01-07 04:00:42 C 01 57 12.55 +00 36 31.5 q 703
2014-01-12 00:40:50 C 02 02 55.04 +01 39 18.6 u H21
2014-01-12 00:43:01 C 02 02 55.15 +01 39 19.8 u H21
2014-01-12 00:47:07 C 02 02 55.35 +01 39 21.9 u H21
2014-01-12 00:50:08 C 02 02 55.49 +01 39 23.4 u H21
2014-01-12 00:58:50 C 02 02 55.91 +01 39 27.9 u H21
2014-01-13 18:19:16 C 02 05 01.48 +02 01 29.1 q A92
2014-01-13 18:39:48 C 02 05 02.41 +02 01 38.7 q A92
2014-01-13 18:59:21 C 02 05 03.46 +02 01 49.3 q A92
2014-01-14 02:35:43 C 02 05 26.76 +02 05 50.9 u H21
2014-01-14 02:38:51 C 02 05 26.91 +02 05 52.8 u H21
2014-01-14 02:41:59 C 02 05 27.06 +02 05 54.2 u H21
2014-01-14 02:45:29 C 02 05 27.24 +02 05 56.1 u H21
2014-01-14 02:49:20 C 02 05 27.44 +02 05 58.3 u H21
2014-01-14 02:53:08 C 02 05 27.63 +02 06 00.3 u H21
2014-01-14 02:56:57 C 02 05 27.81 +02 06 02.6 u H21
2014-01-14 03:05:51 C 02 05 28.24 +02 06 07.2 u H21
2014-01-16 03:37:03 C 02 07 58.80 +02 31 43.4 q H45
2014-01-16 03:40:06 C 02 07 58.94 +02 31 45.5 q H45
2014-01-16 03:41:48 C 02 07 59.03 +02 31 46.1 q H45
2014-01-19 18:52:35 S 02 12 36.51 +03 17 18.3 L C51
2014-01-19 22:02:21 S 02 12 46.73 +03 18 56.4 L C51
2014-01-20 04:21:56 S 02 13 07.18 +03 22 13.1 L C51
2014-01-20 07:31:32 S 02 13 17.46 +03 23 50.8 L C51
2014-01-20 07:31:43 S 02 13 17.46 +03 23 51.1 L C51
2014-01-20 09:06:31 S 02 13 22.56 +03 24 39.8 L C51
2014-01-20 12:16:18 S 02 13 32.83 +03 26 17.8 L C51
2014-01-20 13:51:06 S 02 13 37.97 +03 27 07.0 L C51
2014-01-20 15:25:54 S 02 13 43.08 +03 27 56.2 L C51
2014-01-20 17:00:53 S 02 13 48.26 +03 28 44.9 L C51
2014-01-20 18:35:41 S 02 13 53.37 +03 29 33.8 L C51
2014-01-20 21:45:28 S 02 14 03.65 +03 31 11.8 L C51
2014-01-21 04:04:52 S 02 14 24.32 +03 34 27.0 L C51
2014-01-21 07:14:38 S 02 14 34.64 +03 36 04.7 L C51
2014-01-23 18:29:58 C 02 17 49.99 +04 06 21.2 r 006
2014-01-23 18:40:51 C 02 17 50.57 +04 06 27.2 r 006
2014-01-23 18:50:19 C 02 17 51.07 +04 06 31.0 r 006
2014-01-28 02:08:13 C 02 23 40.42 +04 58 35.0 q 703
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)