4769 Castalia (1989 PB)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4831981091 ± 2.00e+00
Semi-major axis (a)1.0630936583 AU ± 3.00e+00
Inclination (i)8.88518894° ± 4.00e+00
Long. of Asc. Node (Ω)325.50236492° ± 5.00e+00
Arg. of Perihelion (ω)121.45274993° ± 6.00e+00
Mean Anomaly (M)323.77077031° ± 1.44e-04
Mean Motion (n)0.8991972810°/day ± 3.81e+00
Perihelion dist (q)0.54940881 AU ± 2.63e+00
Aphelion dist (Q)1.57677850 AU ± 4.93e+00
Orbital Period1.09611795 yr ± 4.64e+00
NGA Modelr2
A2-3.22072326e-06 AU/d²
Physical Parameters
H (abs. magnitude)17.40
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.435″
Uncertainty0
Orbit TypeApollo
MOID0.020034 AU
Observations Used614
Radar Obs Used13
Gaia Obs Used139
Oppositions2
Arc Total1989-2026
First Observation Used1989-08-01
Last Observation Used2026-03-31
Observations (654)
Date Type RA Dec Mag Band Observatory
1989-08-01 10:45:45 A 23 29 38.05 -12 20 10.7 16.0 675
1989-08-02 10:43:14 A 23 30 31.27 -12 00 52.9 675
1989-08-02 11:22:29 A 23 30 32.29 -12 00 23.0 675
1989-08-08 08:30:35 A 23 36 04.39 -09 24 42.0 657
1989-08-08 09:32:36 A 23 36 06.36 -09 23 12.3 657
1989-08-09 10:01:30 A 23 37 09.93 -08 44 55.9 15.0 675
1989-08-10 09:11:45 A 23 38 14.68 -08 04 15.0 675
1989-08-11 08:46:00 A 23 39 24.48 -07 17 34.6 15.0 675
1989-08-11 11:22:30 A 23 39 29.98 -07 12 02.1 675
1989-08-12 10:34:00 A 23 40 45.93 -06 18 58.9 657
1989-08-12 19:02:55 A 23 41 12.24 -05 55 55.0 413
1989-08-12 19:05:56 A 23 41 12.39 -05 55 46.8 413
1989-08-12 19:09:26 A 23 41 12.50 -05 55 38.6 413
1989-08-13 19:47:14 A 23 42 42.44 -04 46 12.2 413
1989-08-14 13:54:09 A 23 44 03.28 -03 47 19.0 413
1989-08-14 14:21:09 A 23 44 04.73 -03 45 45.3 413
1989-08-14 14:33:10 A 23 44 05.35 -03 45 04.4 413
1989-08-14 15:16:00 A 23 44 07.50 -03 42 34.4 413
1989-08-14 16:15:10 A 23 44 10.49 -03 39 06.7 413
1989-08-14 17:05:40 A 23 44 13.08 -03 36 08.0 413
1989-08-14 19:05:33 A 23 44 19.55 -03 28 58.8 413
1989-08-14 19:20:15 A 23 44 20.38 -03 28 05.7 413
1989-08-14 19:34:33 A 23 44 21.18 -03 27 13.7 413
1989-08-14 19:45:19 A 23 44 21.88 -03 26 34.7 413
1989-08-15 11:10:59 A 23 45 39.69 -02 28 50.1 568
1989-08-15 13:54:12 A 23 45 54.15 -02 16 17.6 413
1989-08-15 15:27:39 A 23 45 59.83 -02 09 47.5 413
1989-08-15 15:50:10 A 23 46 01.25 -02 08 13.7 413
1989-08-15 16:15:41 A 23 46 02.75 -02 06 25.1 413
1989-08-15 18:52:27 A 23 46 12.50 -01 55 14.2 413
1989-08-15 19:34:05 A 23 46 15.31 -01 52 13.6 413
1989-08-17 02:18:11 A 23 49 16.29 +00 37 20.0 12.5 503
1989-08-17 02:29:08 A 23 49 17.41 +00 38 21.6 494
1989-08-17 02:43:09 A 23 49 18.60 +00 39 39.7 494
1989-08-17 03:42:59 A 23 49 30.35 +00 47 40.4 809
1989-08-17 03:54:00 A 23 49 31.39 +00 48 47.1 809
1989-08-17 13:26:09 A 23 50 36.19 +01 45 47.0 413
1989-08-17 14:28:27 A 23 50 42.02 +01 52 18.1 413
1989-08-17 14:45:29 A 23 50 41.10 +01 54 27.3 13.0 474
1989-08-17 15:13:00 A 23 50 43.69 +01 57 21.8 474
1989-08-17 19:48:07 A 23 51 12.47 +02 26 42.0 413
1989-08-18 12:10:46 A 23 53 34.54 +04 24 56.9 474
1989-08-18 12:12:16 A 23 53 34.70 +04 25 08.9 474
1989-08-18 12:42:15 A 23 53 38.42 +04 29 04.5 474
1989-08-18 12:43:16 A 23 53 38.53 +04 29 12.1 474
1989-08-18 17:34:04 A 23 54 16.14 +05 07 53.8 413
1989-08-20 11:03:15 A 00 02 36.13 +12 24 36.6 474
1989-08-20 11:27:30 A 00 02 41.81 +12 30 03.1 474
1989-08-20 11:48:31 A 00 02 46.65 +12 34 46.1 474
1989-08-20 15:17:05 A 00 03 37.63 +13 22 13.3 413
Radar Observations (27)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1989-08-19 06:23:00 223401 2 Hz 2380 -1 -1
1989-08-19 07:04:00 59512323 10 us 2380 -1 -1
1989-08-19 07:14:00 59456416 10 us 2380 -1 -1
1989-08-19 07:23:00 59406173 10 us 2380 -1 -1
1989-08-19.265972 22340100 200 Hz 2380 251 251
1989-08-19.294444 5951232300 10000 us 2380 251 251
1989-08-19.301389 5945641600 10000 us 2380 251 251
1989-08-19.307639 5940617300 10000 us 2380 251 251
1989-08-20 05:42:00 215029 2 Hz 2380 -1 -1
1989-08-20 07:16:00 211450 1 Hz 2380 -1 -1
1989-08-20.237500 21502900 200 Hz 2380 251 251
1989-08-20.302778 21145000 100 Hz 2380 251 251
1989-08-21 06:14:00 44374924 3 us 2380 -1 -1
1989-08-21 06:18:00 44354892 3 us 2380 -1 -1
1989-08-21 06:59:00 196833 2 Hz 2380 -1 -1
1989-08-21 07:24:00 195785 1 Hz 2380 -1 -1
1989-08-21.259722 4437492400 3000 us 2380 251 251
1989-08-21.262500 4435489200 3000 us 2380 251 251
1989-08-21.290972 19683300 200 Hz 2380 251 251
1989-08-21.308333 19578500 100 Hz 2380 251 251
1989-08-22 06:45:00 37453066.9 0.3 us 2380 -1 -1
1989-08-22 07:06:00 37361686 2 us 2380 -1 -1
1989-08-22.281250 3745306690 300 us 2380 251 251
1989-08-22.295833 3736168600 2000 us 2380 251 251
1989-08-30 19:35:00 -785297 8 Hz 8495 -14 -14
1989-08-30.815972 -78529700 800 Hz 8495 253 253
2012-09-14 19:40:00 160720139.48 2 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)