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
2007-02-15 20:34:54 C 06 59 53.98 +19 40 20.5 c A24
2007-02-15 20:51:00 C 06 59 53.53 +19 40 23.3 c A24
2007-02-15 21:16:44 C 06 59 52.82 +19 40 27.7 c A24
2007-02-15 21:44:11 C 06 59 51.98 +19 40 32.6 c A24
2007-02-15 21:45:38 C 06 59 51.94 +19 40 33.0 c A24
2007-02-15 22:03:04 C 06 59 51.46 +19 40 35.9 c A24
2007-02-15 22:38:36 C 06 59 50.47 +19 40 42.2 c A24
2007-02-16 21:31:37 C 06 59 14.35 +19 44 40.9 c A24
2007-02-16 21:33:04 C 06 59 14.34 +19 44 41.3 c A24
2007-02-16 21:51:29 C 06 59 13.96 +19 44 44.1 c A24
2007-02-16 22:18:17 C 06 59 13.13 +19 44 48.9 c A24
2007-02-16 22:26:37 C 06 59 12.95 +19 44 50.6 c A24
2007-02-16 22:28:05 C 06 59 12.88 +19 44 50.4 c A24
2007-02-16 22:48:22 C 06 59 12.33 +19 44 54.0 c A24
2007-02-17 05:29:57 C 06 59 02.11 +19 46 05.0 c 704
2007-02-17 05:47:11 C 06 59 01.73 +19 46 06.8 c 704
2007-02-17 06:04:31 C 06 59 01.27 +19 46 10.3 c 704
2007-02-17 06:21:48 C 06 59 00.75 +19 46 13.2 c 704
2007-02-18 18:51:06 C 06 58 08.28 +19 52 22.4 c A24
2007-02-18 18:52:33 C 06 58 08.24 +19 52 22.4 c A24
2007-02-18 19:12:42 C 06 58 07.76 +19 52 25.9 c A24
2007-02-18 19:32:02 C 06 58 07.30 +19 52 29.0 c A24
2007-02-18 19:51:02 C 06 58 06.85 +19 52 32.2 c A24
2007-02-18 19:52:33 C 06 58 06.80 +19 52 32.6 c A24
2007-02-18 20:12:19 C 06 58 06.33 +19 52 36.1 c A24
2007-02-18 20:49:54 C 06 58 05.43 +19 52 42.4 c A24
2007-02-18 20:51:25 C 06 58 05.39 +19 52 42.5 c A24
2007-02-18 21:08:25 C 06 58 04.99 +19 52 45.4 c A24
2007-02-18 21:27:43 C 06 58 04.52 +19 52 48.8 c A24
2007-02-18 21:58:33 C 06 58 03.76 +19 52 53.9 c A24
2007-02-19 11:25:53 C 06 57 45.77 +19 55 07.8 r 379
2007-02-19 11:37:52 C 06 57 45.46 +19 55 09.7 r 379
2007-02-19 11:39:58 C 06 57 45.43 +19 55 10.0 r 379
2007-02-19 11:44:09 C 06 57 45.33 +19 55 10.8 r 379
2007-02-19 11:46:15 C 06 57 45.26 +19 55 11.1 r 379
2007-02-19 11:48:21 C 06 57 45.21 +19 55 11.3 r 379
2007-02-19 21:06:27 C 06 57 33.02 +19 56 42.4 c A24
2007-02-19 21:08:00 C 06 57 32.99 +19 56 42.6 c A24
2007-02-19 21:29:55 C 06 57 32.48 +19 56 46.1 c A24
2007-02-19 21:51:05 C 06 57 32.02 +19 56 49.6 c A24
2007-02-19 22:11:51 C 06 57 31.58 +19 56 53.7 c A24
2007-02-19 22:13:25 C 06 57 31.54 +19 56 53.1 c A24
2007-02-19 22:32:45 C 06 57 31.10 +19 56 56.3 c A24
2007-02-19 22:51:41 C 06 57 30.66 +19 56 59.6 c A24
2007-02-19 23:10:19 C 06 57 30.25 +19 57 02.5 c A24
2007-02-20 19:19:03 C 06 57 05.35 +20 00 18.6 c A24
2007-02-20 19:29:47 C 06 57 05.11 +20 00 20.4 c A24
2007-02-20 19:43:34 C 06 57 04.83 +20 00 22.6 c A24
2007-02-20 19:58:49 C 06 57 04.51 +20 00 25.0 c A24
2007-02-20 20:12:36 C 06 57 04.20 +20 00 27.4 c A24
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)