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
2021-09-30 01:43:58 s 1 +132288.48 6 -20712.538 670.0 C57
2021-09-30 01:53:58 S 06 34 19.610 +14 39 00.90 V C57
2021-09-30 01:53:58 s 1 +132956.74 8 -19746.121 410.0 C57
2021-09-30 02:03:58 S 06 34 20.057 +14 38 58.24 V C57
2021-09-30 02:03:58 s 1 +133618.26 5 -18778.705 7880.0 C57
2021-09-30 02:13:58 S 06 34 20.335 +14 38 58.02 V C57
2021-09-30 02:13:58 s 1 +134273.08 3 -17810.350 3220.0 C57
2021-09-30 02:23:58 S 06 34 20.880 +14 38 58.67 V C57
2021-09-30 02:23:58 s 1 +134921.24 8 -16841.114 6600.0 C57
2021-09-30 02:33:58 S 06 34 21.394 +14 38 55.50 V C57
2021-09-30 02:33:58 s 1 +135562.80 5 -15871.057 8160.0 C57
2021-09-30 03:43:58 S 06 34 24.050 +14 38 51.32 V C57
2021-09-30 03:43:58 s 1 +139872.53 7 - 9062.248 1280.0 C57
2021-09-30 03:53:58 S 06 34 24.535 +14 38 49.09 V C57
2021-09-30 03:53:58 s 1 +140462.87 5 - 8087.555 3870.0 C57
2021-09-30 04:03:58 S 06 34 24.888 +14 38 48.37 V C57
2021-09-30 04:03:58 s 1 +141047.01 4 - 7112.508 6010.0 C57
2021-09-30 04:13:58 S 06 34 25.294 +14 38 47.11 V C57
2021-09-30 04:13:58 s 1 +141624.99 8 - 6137.153 7860.0 C57
2021-09-30 04:23:58 S 06 34 25.690 +14 38 46.90 V C57
2021-09-30 04:23:58 s 1 +142196.87 2 - 5161.537 9570.0 C57
2021-09-30 04:33:58 S 06 34 26.213 +14 38 45.49 V C57
2021-09-30 04:33:58 s 1 +142762.68 0 - 4185.704 1290.0 C57
2021-09-30 04:43:58 S 06 34 26.494 +14 38 44.66 V C57
2021-09-30 04:43:58 s 1 +143322.46 6 - 3209.698 3170.0 C57
2021-09-30 04:53:58 S 06 34 26.952 +14 38 42.76 V C57
2021-09-30 04:53:58 s 1 +143876.27 4 - 2233.562 5340.0 C57
2021-09-30 05:03:58 S 06 34 27.125 +14 38 40.78 V C57
2021-09-30 05:03:58 s 1 +144424.14 8 - 1257.336 7960.0 C57
2021-09-30 05:53:58 S 06 34 29.383 +14 38 37.25 V C57
2021-09-30 05:53:58 s 1 +147076.01 2 + 3623.722 2840.0 C57
2021-09-30 06:03:58 S 06 34 29.851 +14 38 35.63 V C57
2021-09-30 06:03:58 s 1 +147589.18 3 + 4599.652 1180.0 C57
2021-09-30 06:13:58 S 06 34 30.336 +14 38 34.40 V C57
2021-09-30 06:13:58 s 1 +148096.71 9 + 5575.402 960.0 C57
2021-09-30 06:23:58 S 06 34 30.679 +14 38 35.02 V C57
2021-09-30 06:23:58 s 1 +148598.66 1 + 6550.939 2330.0 C57
2021-09-30 06:33:58 S 06 34 31.056 +14 38 33.94 V C57
2021-09-30 06:33:58 s 1 +149095.05 2 + 7526.227 5430.0 C57
2021-09-30 06:43:58 S 06 34 31.586 +14 38 33.65 V C57
2021-09-30 06:43:58 s 1 +149585.93 1 + 8501.232 390.0 C57
2021-09-30 07:03:58 S 06 34 32.273 +14 38 31.67 V C57
2021-09-30 07:03:58 s 1 +150551.32 3 +10450.268 6450.0 C57
2021-09-30 07:13:58 S 06 34 32.657 +14 38 30.37 V C57
2021-09-30 07:13:58 s 1 +151025.91 5 +11424.234 7830.0 C57
2021-09-30 07:23:58 S 06 34 33.029 +14 38 29.33 V C57
2021-09-30 07:23:58 s 1 +151495.15 9 +12397.792 1610.0 C57
2021-09-30 08:23:58 S 06 34 35.395 +14 38 25.04 V C57
2021-09-30 08:23:58 s 1 +154200.52 5 +18228.930 2220.0 C57
2021-09-30 08:43:58 S 06 34 36.262 +14 38 21.77 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)