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
2025-05-26 23:48:45 C 19 18 23.885 -41 34 06.89 V M22
2025-05-27 13:11:40 C 19 17 18.395 -41 40 11.19 X F51
2025-05-27 13:23:48 C 19 17 17.337 -41 40 16.53 X F51
2025-05-27 13:37:52 C 19 17 16.109 -41 40 22.62 X F51
2025-05-27 13:50:02 C 19 17 15.051 -41 40 27.96 X F51
2025-05-31 01:55:44 C 19 09 39.142 -42 16 07.97 V M22
2025-05-31 02:00:20 C 19 09 38.676 -42 16 10.16 V M22
2025-05-31 02:08:52 C 19 09 37.788 -42 16 13.48 V M22
2025-05-31 02:23:23 C 19 09 36.302 -42 16 19.02 V M22
2025-06-02 05:51:34 C 19 04 18.182 -42 36 46.48 V W68
2025-06-02 05:54:13 C 19 04 17.858 -42 36 47.70 V W68
2025-06-02 05:58:52 C 19 04 17.362 -42 36 49.10 V W68
2025-06-02 06:00:49 C 19 04 17.184 -42 36 49.97 V W68
2025-06-02 06:04:49 C 19 04 16.711 -42 36 52.16 V W68
2025-06-02 06:07:26 C 19 04 16.382 -42 36 53.28 V W68
2025-06-02 06:10:49 C 19 04 16.025 -42 36 53.57 V W68
2025-06-18 05:45:42 C 18 11 14.412 -43 51 22.54 V W68
2025-06-18 05:51:02 C 18 11 13.529 -43 51 22.36 V W68
2025-06-18 06:39:19 C 18 11 05.594 -43 51 18.97 V W68
2025-06-18 07:17:52 C 18 10 59.273 -43 51 16.06 V W68
2025-06-24 00:51:52 C 17 48 53.746 -43 27 25.56 V W68
2025-06-24 01:02:12 C 17 48 52.068 -43 27 23.18 V W68
2025-06-24 01:12:30 C 17 48 50.371 -43 27 20.66 V W68
2025-06-30 04:10:58 C 17 26 04.858 -42 29 38.15 V W68
2025-06-30 04:14:57 C 17 26 04.253 -42 29 36.28 V W68
2025-06-30 04:22:13 C 17 26 03.132 -42 29 32.75 V W68
2025-07-13 04:03:20 C 16 47 42.060 -39 11 31.24 V W68
2025-07-13 04:07:22 C 16 47 41.688 -39 11 27.96 V W68
2025-07-13 04:15:21 C 16 47 40.829 -39 11 22.31 V W68
2025-07-13 04:51:42 C 16 47 37.234 -39 10 55.09 V W68
2025-07-18 02:52:07 C 16 37 39.451 -37 45 03.96 V W68
2025-07-18 02:56:17 C 16 37 39.098 -37 45 01.19 V W68
2025-07-18 03:03:38 C 16 37 38.530 -37 44 55.36 V W68
2025-07-18 03:21:44 C 16 37 37.133 -37 44 42.65 V W68
2025-07-25 02:17:41 C 16 27 45.192 -35 45 52.70 V W68
2025-07-25 02:22:29 C 16 27 44.940 -35 45 49.57 V W68
2025-07-25 02:29:59 C 16 27 44.556 -35 45 44.28 V W68
2025-07-25 02:44:18 C 16 27 43.850 -35 45 33.98 V W68
2025-07-26 19:47:14 C 16 26 01.138 -35 17 39.12 V M22
2025-07-26 19:52:29 C 16 26 00.871 -35 17 35.88 V M22
2025-07-26 20:00:18 C 16 26 00.554 -35 17 31.13 V M22
2025-07-26 20:17:41 C 16 25 59.822 -35 17 18.96 V M22
2025-07-27 19:39:15 C 16 25 08.510 -35 01 45.05 V M22
2025-07-27 19:43:16 C 16 25 08.371 -35 01 42.28 V M22
2025-07-27 19:52:26 C 16 25 08.064 -35 01 35.94 V M22
2025-07-27 20:10:24 C 16 25 07.351 -35 01 24.06 V M22
2025-07-29 00:51:17 C 16 24 11.297 -34 42 37.51 V W68
2025-07-29 01:16:35 C 16 24 10.502 -34 42 20.88 V W68
2025-07-29 01:21:10 C 16 24 10.332 -34 42 18.18 V W68
2025-07-29 01:29:48 C 16 24 10.020 -34 42 12.06 V W68
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)