171576 (1999 VP11)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5836605346 ± 1.64e-08
Semi-major axis (a)1.0857331459 AU ± 8.70e-10
Inclination (i)17.27622291° ± 2.88e-06
Long. of Asc. Node (Ω)208.06025056° ± 1.58e-06
Arg. of Perihelion (ω)61.76358487° ± 2.22e-06
Mean Anomaly (M)99.66941613° ± 2.85e-06
Mean Motion (n)0.8712195884°/day ± 1.05e-09
Perihelion dist (q)0.45203356 AU ± 1.78e-08
Aphelion dist (Q)1.71943273 AU ± 1.78e-08
Orbital Period1.13131786 yr ± 1.36e-09
Physical Parameters
H (abs. magnitude)18.68
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.312″
Uncertainty0
Orbit TypeApollo
MOID0.003011 AU
Observations Used525
Radar Obs Used6
Gaia Obs Used9
Oppositions2
Arc Total1999-2026
First Observation Used1999-11-07
Last Observation Used2026-01-12
Observations (569)
Date Type RA Dec Mag Band Observatory
2025-10-31 13:33:17 C 05 36 27.894 +02 18 06.80 X F51
2025-10-31 13:53:00 C 05 36 24.889 +02 17 40.61 X F51
2025-11-01 12:08:11 C 05 33 07.570 +01 48 14.00 V T08
2025-11-01 12:19:06 C 05 33 05.904 +01 48 00.47 V T08
2025-11-01 12:23:05 C 05 33 05.230 +01 47 55.32 V T08
2025-11-01 12:30:13 C 05 33 04.162 +01 47 45.89 V T08
2025-11-11 08:51:39 C 04 56 19.036 -02 55 20.78 V 703
2025-11-11 08:54:56 C 04 56 18.445 -02 55 22.73 V 703
2025-11-11 08:58:12 C 04 56 17.934 -02 55 27.59 V 703
2025-11-11 09:01:27 C 04 56 17.452 -02 55 31.22 V 703
2025-11-11 23:02:08 C 04 54 04.853 -03 09 42.55 V M22
2025-11-11 23:06:03 C 04 54 04.231 -03 09 46.51 V M22
2025-11-11 23:19:50 C 04 54 01.968 -03 10 00.55 V M22
2025-11-11 23:53:27 C 04 53 56.558 -03 10 34.46 V M22
2025-11-14 03:31:31 C 04 45 49.836 -04 01 18.37 V W68
2025-11-14 03:35:34 C 04 45 49.190 -04 01 22.19 V W68
2025-11-14 03:39:38 C 04 45 48.530 -04 01 26.69 V W68
2025-11-14 04:28:49 C 04 45 40.622 -04 02 12.23 V W68
2025-11-16 10:23:37 C 04 37 18.944 -04 50 33.20 X F52
2025-11-16 10:39:32 C 04 37 16.425 -04 50 46.63 X F52
2025-11-16 10:55:25 C 04 37 13.907 -04 51 00.01 X F52
2025-11-16 11:11:18 C 04 37 11.394 -04 51 13.45 X F52
2025-11-17 22:14:07 C 04 31 51.482 -05 19 24.35 V M22
2025-11-17 22:18:41 C 04 31 50.789 -05 19 27.84 V M22
2025-11-17 22:46:13 B 04 31 46.21 -05 20 11.3 X L76
2025-11-17 22:57:00 B 04 31 44.53 -05 20 19.9 X L76
2025-11-17 23:03:49 C 04 31 43.870 -05 20 01.61 V M22
2025-11-17 23:07:49 B 04 31 42.85 -05 20 28.0 X L76
2025-11-17 23:11:38 C 04 31 42.562 -05 20 10.14 V M22
2025-11-20 06:04:06 C 04 23 33.442 -06 00 07.85 V W68
2025-11-20 06:12:02 C 04 23 32.321 -06 00 13.10 V W68
2025-11-20 06:16:34 C 04 23 31.510 -06 00 16.20 V W68
2025-11-20 06:54:59 C 04 23 25.810 -06 00 41.51 V W68
2025-11-20 23:43:30 C 04 20 59.846 -06 11 49.13 V M22
2025-11-20 23:48:44 C 04 20 59.081 -06 11 51.43 V M22
2025-11-20 23:57:52 C 04 20 57.710 -06 11 57.77 V M22
2025-11-21 00:47:15 C 04 20 50.398 -06 12 29.92 V M22
2025-11-23 10:48:05 C 04 12 41.052 -06 47 01.36 X F51
2025-11-23 11:07:12 C 04 12 38.342 -06 47 11.62 X F51
2025-11-23 11:26:14 C 04 12 35.649 -06 47 21.85 X F51
2025-11-23 11:45:15 C 04 12 32.958 -06 47 31.92 X F51
2025-11-25 07:22:37 C 04 06 41.728 -07 09 17.96 V 703
2025-11-25 07:25:56 C 04 06 41.184 -07 09 18.07 V 703
2025-11-25 07:32:30 C 04 06 40.291 -07 09 20.16 V 703
2025-11-25 10:50:40 C 04 06 14.227 -07 10 48.68 V T08
2025-11-25 10:55:18 C 04 06 13.560 -07 10 50.88 V T08
2025-11-25 11:12:04 C 04 06 11.299 -07 10 58.91 V T08
2025-11-25 11:20:00 C 04 06 10.207 -07 11 02.29 V T08
2025-11-29 05:58:14 C 03 54 53.413 -07 45 07.27 V 703
2025-11-29 06:08:07 C 03 54 52.204 -07 45 10.08 V 703
Radar Observations (6)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2017-10-24 05:20:00 -1000713.203 3 Hz 8560 -14 -14
2017-10-24 05:30:00 -1002732.54 3 Hz 8560 -14 -14
2017-10-24 05:40:00 26252169.71 2 us 8560 -14 -14
2017-10-24 06:00:00 26393298.09 0.5 us 8560 -14 -14
2017-10-25 05:20:00 36832306.817 1 us 8560 -14 -14
2017-10-26 04:00:00 47633179 1 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)