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
2017-10-25 01:50:34 C 23 37 55.94 -23 39 34.5 q V83
2017-10-25 01:59:36 C 23 38 08.56 -23 38 40.7 q V83
2017-10-25 02:18:22 C 23 38 31.36 -23 36 45.8 q W46
2017-10-25 02:18:57 C 23 38 32.25 -23 36 41.6 q W46
2017-10-25 02:19:12 C 23 38 35.76 -23 36 43.7 q V83
2017-10-25 02:27:59 C 23 38 47.81 -23 35 51.7 q V83
2017-10-25 02:31:13 C 23 38 49.09 -23 35 28.0 q W46
2017-10-25 02:39:46 C 23 39 04.04 -23 34 41.3 q V83
2017-10-25 02:50:34 C 23 39 18.73 -23 33 37.1 q V83
2017-10-25 03:00:04 C 23 39 31.54 -23 32 40.8 q V83
2017-10-25 03:08:45 C 23 39 43.27 -23 31 49.3 q V83
2017-10-25 03:20:14 C 23 39 58.67 -23 30 41.1 q V83
2017-10-25 03:31:15 C 23 40 13.48 -23 29 35.5 q V83
2017-10-25 03:52:56 C 23 40 42.20 -23 27 27.1 q V83
2017-10-25 04:10:58 C 23 41 05.90 -23 25 40.5 q V83
2017-10-25 04:20:35 C 23 41 18.65 -23 24 43.1 q V83
2017-10-25 04:30:53 C 23 41 31.85 -23 23 42.8 q V83
2017-10-26 04:25:34 C 00 06 03.46 -21 29 25.3 U 703
2017-10-26 04:33:23 C 00 06 09.10 -21 28 55.1 U 703
2017-10-26 04:41:08 C 00 06 14.68 -21 28 25.8 U 703
2017-10-26 04:48:54 C 00 06 20.29 -21 27 55.4 U 703
2017-10-26 06:45:44 C 00 07 40.75 -21 20 45.2 P V78
2017-10-26 06:48:08 C 00 07 42.42 -21 20 36.0 P V78
2017-10-26 06:49:45 C 00 07 43.57 -21 20 29.5 P V78
2017-10-27 08:18:38 C 00 22 35.57 -20 01 33.8 T05
2017-10-27 08:31:48 C 00 22 41.05 -20 01 00.4 T05
2017-10-27 08:33:06 C 00 22 41.60 -20 00 57.1 T05
2017-10-27 08:56:49 C 00 22 51.43 -19 59 56.7 T05
2017-10-27 20:31:24 C 00 27 43.43 -19 33 20.2 q 006
2017-10-27 20:33:04 C 00 27 44.02 -19 33 16.5 q 006
2017-10-27 20:35:04 C 00 27 44.71 -19 33 11.8 q 006
2017-10-27 20:36:44 C 00 27 45.32 -19 33 08.5 q 006
2017-10-27 20:38:24 C 00 27 45.92 -19 33 05.2 q 006
2017-10-27 20:40:04 C 00 27 46.47 -19 33 01.7 q 006
2017-10-28 03:53:09 C 00 30 16.55 -19 15 40.3 q 834
2017-10-28 04:15:24 C 00 30 23.53 -19 14 54.8 q 834
2017-10-28 04:48:57 C 00 30 34.07 -19 13 46.4 q 834
2017-10-28 13:11:43 C 00 33 20.38 -19 00 21.7 q D29
2017-10-28 13:33:10 C 00 33 26.18 -18 59 44.2 q D29
2017-10-28 13:54:35 C 00 33 31.93 -18 59 06.5 q D29
2017-10-28 20:58:41 C 00 35 33.52 -18 47 12.7 q 006
2017-10-28 21:00:25 C 00 35 33.94 -18 47 10.0 q 006
2017-10-28 21:02:09 C 00 35 34.37 -18 47 07.4 q 006
2017-10-28 21:03:53 C 00 35 34.78 -18 47 04.6 q 006
2017-10-28 21:05:36 C 00 35 35.22 -18 47 01.7 q 006
2017-10-28 21:07:21 C 00 35 35.66 -18 46 59.2 q 006
2017-10-28 21:09:05 C 00 35 36.07 -18 46 56.2 q 006
2017-10-28 21:10:23 C 00 35 36.41 -18 46 54.3 q 006
2017-10-29 04:10:41 C 00 37 26.62 -18 35 39.3 U 703
2017-10-29 04:25:09 C 00 37 29.75 -18 35 18.4 U 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)