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
2024-02-02 05:31:45 C 01 00 25.471 -01 33 33.77 V T08
2024-02-02 05:53:40 C 01 00 27.547 -01 33 18.72 V T08
2024-02-04 05:28:30 C 01 05 00.842 -01 01 02.24 V T05
2024-02-04 05:32:35 C 01 05 01.207 -01 00 59.36 V T05
2024-02-04 05:41:15 C 01 05 02.038 -01 00 53.75 V T05
2024-02-04 05:56:20 C 01 05 03.432 -01 00 43.27 V T05
2024-02-07 06:12:09 C 01 11 54.950 -00 12 24.73 V T08
2024-02-07 06:16:08 C 01 11 55.342 -00 12 22.00 V T08
2024-02-07 06:45:16 C 01 11 58.063 -00 12 02.92 V T08
2024-02-07 06:53:14 C 01 11 58.800 -00 11 57.73 V T08
2024-02-10 05:34:12 C 01 18 37.591 +00 34 26.00 V T08
2024-02-10 05:38:58 C 01 18 38.021 +00 34 29.35 V T08
2024-02-10 05:47:10 C 01 18 38.789 +00 34 34.54 V T08
2024-02-10 06:04:54 C 01 18 40.442 +00 34 45.95 V T08
2024-02-19 02:25:26 C 01 38 18.593 +02 48 52.20 V 703
2024-02-19 02:28:42 C 01 38 18.888 +02 48 54.22 V 703
2024-02-19 02:31:58 C 01 38 19.205 +02 48 55.66 V 703
2024-02-19 02:35:13 C 01 38 19.486 +02 48 57.74 V 703
2024-02-24 06:01:34 C 01 49 32.376 +04 03 11.41 V T05
2024-02-24 06:06:22 C 01 49 32.806 +04 03 14.47 V T05
2024-02-24 06:13:52 C 01 49 33.454 +04 03 18.43 V T05
2024-02-24 06:40:44 C 01 49 35.926 +04 03 34.20 V T05
2024-02-28 05:49:48 C 01 58 09.514 +04 58 50.38 V T05
2024-02-28 05:59:51 C 01 58 10.404 +04 58 56.17 V T05
2024-02-28 06:04:24 C 01 58 10.819 +04 58 58.84 V T05
2024-02-28 06:24:50 C 01 58 12.631 +04 59 10.32 V T05
2024-03-04 17:48:28 C 02 09 55.71 +06 12 41.3 X G02
2024-03-04 17:54:04 C 02 09 56.21 +06 12 44.2 X G02
2024-03-04 17:59:38 C 02 09 56.71 +06 12 47.3 X G02
2024-03-05 02:35:33 C 02 10 42.424 +06 17 29.98 V 703
2024-03-05 02:38:53 C 02 10 42.737 +06 17 31.78 V 703
2024-03-05 02:42:13 C 02 10 43.025 +06 17 33.68 V 703
2024-03-05 02:45:33 C 02 10 43.316 +06 17 35.16 V 703
2024-09-22 13:39:38 C 08 23 30.804 +15 52 57.54 V T08
2024-09-22 13:47:27 C 08 23 31.327 +15 52 57.36 V T08
2024-09-22 14:02:13 C 08 23 32.050 +15 52 53.08 V T08
2024-09-22 14:32:59 C 08 23 33.792 +15 52 48.04 V T08
2024-09-23 11:48:39 C 08 24 44.244 +15 49 08.62 V 703
2024-09-23 11:53:21 C 08 24 44.467 +15 49 07.18 V 703
2024-09-23 11:58:03 C 08 24 44.701 +15 49 05.52 V 703
2024-09-23 12:02:45 C 08 24 44.971 +15 49 05.23 V 703
2024-09-23 14:40:19 C 08 24 53.736 +15 48 38.99 V T08
2024-09-23 15:08:53 C 08 24 55.241 +15 48 33.77 V T08
2024-09-23 15:17:26 C 08 24 55.711 +15 48 32.76 V T08
2024-09-23 15:23:12 C 08 24 56.030 +15 48 32.00 V T08
2024-10-01 14:44:17 C 08 35 08.357 +15 15 29.45 V T08
2024-10-01 14:50:17 C 08 35 08.676 +15 15 28.51 V T08
2024-10-01 15:04:58 C 08 35 09.434 +15 15 25.88 V T08
2024-10-01 15:16:24 C 08 35 09.984 +15 15 24.01 V T08
2024-10-03 14:49:00 C 08 37 35.753 +15 07 13.66 V T05
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)