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
2021-11-12 17:23:55 S 06 44 03.034 +12 55 56.89 V C57
2021-11-12 17:23:55 s 1 +35802.970 0 +375769.08 9560.0 C57
2021-11-12 17:33:55 S 06 44 02.767 +12 55 56.28 V C57
2021-11-12 17:33:55 s 1 +35452.163 0 +375854.58 2560.0 C57
2021-11-12 17:43:55 S 06 44 02.602 +12 55 55.24 V C57
2021-11-12 17:43:55 s 1 +35101.262 0 +375939.09 5320.0 C57
2021-11-12 19:33:55 S 06 43 59.796 +12 55 50.02 V C57
2021-11-12 19:33:55 s 1 +31235.341 0 +376802.76 1460.0 C57
2021-11-12 19:43:55 S 06 43 59.470 +12 55 49.01 V C57
2021-11-12 19:43:55 s 1 +30883.372 0 +376875.29 1720.0 C57
2021-11-12 20:03:55 S 06 43 58.850 +12 55 48.29 V C57
2021-11-12 20:03:55 s 1 +30179.189 0 +377017.37 1700.0 C57
2021-11-12 20:13:55 S 06 43 58.675 +12 55 47.17 V C57
2021-11-12 20:13:55 s 1 +29826.975 0 +377086.91 1410.0 C57
2021-11-12 20:23:55 S 06 43 58.426 +12 55 47.21 V C57
2021-11-12 20:23:55 s 1 +29474.682 0 +377155.46 960.0 C57
2021-11-12 21:43:55 S 06 43 56.393 +12 55 43.21 V C57
2021-11-12 21:43:55 s 1 +26653.581 0 +377667.97 1450.0 C57
2021-11-12 22:03:55 S 06 43 55.934 +12 55 42.20 V C57
2021-11-12 22:03:55 s 1 +25947.575 0 +377786.15 7580.0 C57
2021-11-12 22:13:55 S 06 43 55.656 +12 55 41.20 V C57
2021-11-12 22:13:55 s 1 +25594.468 0 +377843.74 5450.0 C57
2021-11-12 22:23:55 S 06 43 55.486 +12 55 39.72 V C57
2021-11-12 22:23:55 s 1 +25241.292 0 +377900.34 3180.0 C57
2021-11-12 22:33:55 S 06 43 55.198 +12 55 39.79 V C57
2021-11-12 22:33:55 s 1 +24888.049 0 +377955.94 780.0 C57
2021-11-12 22:43:55 S 06 43 54.871 +12 55 39.50 V C57
2021-11-12 22:43:55 s 1 +24534.740 0 +378010.55 8260.0 C57
2021-11-13 00:33:55 S 06 43 52.094 +12 55 34.28 V C57
2021-11-13 00:33:55 s 1 +20644.226 0 +378545.59 3370.0 C57
2021-11-13 01:03:55 S 06 43 51.540 +12 55 31.98 V C57
2021-11-13 01:03:55 s 1 +19581.968 0 +378670.63 1950.0 C57
2021-11-13 02:43:55 S 06 43 48.874 +12 55 25.93 V C57
2021-11-13 02:43:55 s 1 +16037.858 0 +379022.83 160.0 C57
2021-11-13 03:33:55 S 06 43 47.410 +12 55 21.58 V C57
2021-11-13 03:33:55 s 1 +14264.138 0 +379161.66 2750.0 C57
2021-11-13 05:13:55 S 06 43 44.930 +12 55 20.14 V C57
2021-11-13 05:13:55 s 1 +10713.958 0 +379364.81 8760.0 C57
2021-11-13 05:23:55 S 06 43 44.522 +12 55 16.72 V C57
2021-11-13 05:23:55 s 1 +10358.767 0 +379379.66 3320.0 C57
2021-11-13 05:33:55 S 06 43 44.429 +12 55 18.77 V C57
2021-11-13 05:33:55 s 1 +10003.547 0 +379393.52 7850.0 C57
2021-11-13 05:43:55 S 06 43 44.042 +12 55 18.30 V C57
2021-11-13 05:53:55 S 06 43 43.802 +12 55 16.97 V C57
2021-11-13 06:03:55 S 06 43 43.577 +12 55 16.32 V C57
2021-11-13 06:13:55 S 06 43 43.303 +12 55 15.85 V C57
2021-11-13 06:23:55 S 06 43 42.922 +12 55 13.80 V C57
2021-11-13 07:23:55 S 06 43 41.352 +12 55 12.58 V C57
2021-11-13 07:33:55 S 06 43 41.126 +12 55 12.43 V C57
2021-11-13 07:43:55 S 06 43 40.817 +12 55 11.28 V C57
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)