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
2013-08-02 01:20:28 C 01 36 06.21 +03 05 24.7 q A84
2013-08-02 01:21:48 C 01 36 06.34 +03 05 24.0 q A84
2013-08-02 01:23:06 C 01 36 06.48 +03 05 23.3 q A84
2013-08-02 01:24:25 C 01 36 06.62 +03 05 22.5 q A84
2013-08-02 01:25:43 C 01 36 06.75 +03 05 21.8 q A84
2013-08-02 01:27:01 C 01 36 06.89 +03 05 21.0 q A84
2013-08-02 01:28:18 C 01 36 07.03 +03 05 20.3 q A84
2013-08-02 01:29:37 C 01 36 07.17 +03 05 19.6 q A84
2013-08-02 01:30:54 C 01 36 07.31 +03 05 19.0 q A84
2013-08-02 01:32:13 C 01 36 07.44 +03 05 18.1 q A84
2013-08-02 01:33:30 C 01 36 07.58 +03 05 17.4 q A84
2013-08-02 01:34:49 C 01 36 07.72 +03 05 16.6 q A84
2013-08-02 01:36:06 C 01 36 07.85 +03 05 15.9 q A84
2013-08-02 01:37:25 C 01 36 07.99 +03 05 15.1 q A84
2013-08-02 01:38:42 C 01 36 08.12 +03 05 14.4 q A84
2013-08-02 01:40:00 C 01 36 08.26 +03 05 13.6 q A84
2013-08-02 01:41:18 C 01 36 08.40 +03 05 13.0 q A84
2013-08-02 01:42:38 C 01 36 08.54 +03 05 12.1 q A84
2013-08-02 01:43:56 C 01 36 08.67 +03 05 11.4 q A84
2013-08-02 01:45:15 C 01 36 08.81 +03 05 10.6 q A84
2013-08-02 01:46:31 C 01 36 08.95 +03 05 10.0 q A84
2013-08-02 01:47:51 C 01 36 09.08 +03 05 09.1 q A84
2013-08-02 01:49:08 C 01 36 09.22 +03 05 08.5 q A84
2013-08-02 01:50:27 C 01 36 09.36 +03 05 07.7 q A84
2013-08-02 01:51:44 C 01 36 09.49 +03 05 07.0 q A84
2013-08-02 01:53:01 C 01 36 09.62 +03 05 06.2 q A84
2013-08-02 01:54:19 C 01 36 09.76 +03 05 05.5 q A84
2013-08-02 01:55:38 C 01 36 09.90 +03 05 04.7 q A84
2013-08-02 01:56:56 C 01 36 10.04 +03 05 04.0 q A84
2013-08-02 01:58:15 C 01 36 10.18 +03 05 03.2 q A84
2013-08-02 01:59:33 C 01 36 10.31 +03 05 02.4 q A84
2013-08-02 02:00:53 C 01 36 10.45 +03 05 01.8 q A84
2013-08-02 02:02:10 C 01 36 10.59 +03 05 01.0 q A84
2013-08-02 02:03:30 C 01 36 10.72 +03 05 00.2 q A84
2013-08-02 02:04:47 C 01 36 10.86 +03 04 59.5 q A84
2013-08-02 02:06:07 C 01 36 11.00 +03 04 58.7 q A84
2013-08-02 02:07:25 C 01 36 11.13 +03 04 58.0 q A84
2013-08-02 02:09:03 C 01 36 11.30 +03 04 57.0 q A84
2013-08-02 02:10:20 C 01 36 11.44 +03 04 56.3 q A84
2013-08-02 02:11:40 C 01 36 11.57 +03 04 55.6 q A84
2013-08-05 01:18:58 C 01 43 45.76 +02 23 05.9 12.3 r K90
2013-08-05 01:19:41 C 01 43 45.83 +02 23 05.5 12.4 r K90
2013-08-05 01:20:23 C 01 43 45.90 +02 23 05.0 12.5 r K90
2013-08-05 01:21:06 C 01 43 45.97 +02 23 04.6 12.5 r K90
2013-08-05 01:21:50 C 01 43 46.03 +02 23 04.2 12.3 r K90
2013-08-05 01:22:34 C 01 43 46.11 +02 23 03.8 12.5 r K90
2013-08-05 01:23:17 C 01 43 46.18 +02 23 03.2 12.5 r K90
2013-08-05 01:23:59 C 01 43 46.25 +02 23 02.9 12.5 r K90
2013-08-05 01:24:43 C 01 43 46.32 +02 23 02.4 12.5 r K90
2013-08-05 01:25:26 C 01 43 46.39 +02 23 02.0 12.5 r K90
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)