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
2017-10-29 04:46:54 C 00 37 34.59 -18 34 45.9 U 703
2017-10-29 04:54:56 C 00 37 36.31 -18 34 34.1 U 703
2017-10-29 08:27:35 C 00 38 26.81 -18 29 02.1 T08
2017-10-29 08:37:31 C 00 38 28.86 -18 28 47.6 T08
2017-10-29 08:56:23 C 00 38 32.76 -18 28 20.0 T08
2017-10-29 09:03:39 C 00 38 34.25 -18 28 09.4 T08
2017-10-29 19:18:21 C 00 40 54.94 -18 14 19.3 q 006
2017-10-29 19:20:03 C 00 40 55.31 -18 14 17.0 q 006
2017-10-29 19:22:19 C 00 40 55.71 -18 14 14.1 q 006
2017-10-29 19:24:35 C 00 40 56.15 -18 14 11.0 q 006
2017-10-29 19:26:17 C 00 40 56.47 -18 14 09.3 q 006
2017-10-29 19:27:59 C 00 40 56.81 -18 14 06.6 q 006
2017-10-29 19:30:49 C 00 40 57.37 -18 14 03.4 q 006
2017-10-30 08:48:38 C 00 43 29.52 -17 57 13.8 T08
2017-10-30 08:59:19 C 00 43 31.20 -17 57 01.0 T08
2017-10-30 09:10:27 C 00 43 32.91 -17 56 48.1 T08
2017-11-02 04:15:55 C 00 52 45.24 -16 54 39.3 q V16
2017-11-02 04:16:58 C 00 52 45.31 -16 54 38.6 q V16
2017-11-02 05:02:23 C 00 52 49.29 -16 54 05.4 q V16
2017-11-02 05:03:27 C 00 52 49.34 -16 54 04.3 q V16
2017-11-02 05:21:10 C 00 52 50.88 -16 53 50.8 q V16
2017-11-02 05:22:13 C 00 52 50.97 -16 53 50.3 q V16
2017-11-02 06:01:41 C 00 52 54.33 -16 53 20.6 q V16
2017-11-02 06:02:43 C 00 52 54.43 -16 53 19.5 q V16
2017-11-03 04:14:04 C 00 55 02.98 -16 37 38.9 q V16
2017-11-03 04:15:06 C 00 55 03.04 -16 37 38.1 q V16
2017-11-03 04:42:16 C 00 55 05.03 -16 37 20.3 q V16
2017-11-03 04:43:19 C 00 55 05.13 -16 37 19.4 q V16
2017-11-03 05:17:07 C 00 55 07.58 -16 36 57.4 q V16
2017-11-03 05:18:10 C 00 55 07.65 -16 36 57.0 q V16
2017-11-05 08:57:54 C 00 59 04.03 -16 05 31.7 U T05
2017-11-05 09:07:30 C 00 59 04.54 -16 05 26.2 U T05
2017-11-05 09:17:53 C 00 59 05.06 -16 05 20.4 U T05
2017-11-05 09:28:15 C 00 59 05.62 -16 05 14.5 U T05
2017-11-07 08:34:16 C 01 01 56.20 -15 40 41.9 U T08
2017-11-07 08:46:39 C 01 01 56.73 -15 40 35.9 U T08
2017-11-07 08:58:13 C 01 01 57.21 -15 40 30.0 U T08
2017-11-07 09:10:00 C 01 01 57.71 -15 40 24.1 U T08
2017-11-08 08:51:04 C 01 03 12.26 -15 28 59.4 U T05
2017-11-08 09:02:57 C 01 03 12.72 -15 28 53.7 U T05
2017-11-08 09:14:17 C 01 03 13.17 -15 28 48.3 U T05
2017-11-08 09:25:37 C 01 03 13.60 -15 28 42.9 U T05
2017-11-09 02:47:20 C 01 04 04.81 -15 20 03.3 U 822
2017-11-09 02:57:07 C 01 04 05.18 -15 19 58.6 U 822
2017-11-09 03:08:26 C 01 04 05.61 -15 19 53.5 U 822
2017-11-10 08:44:25 C 01 05 26.88 -15 07 05.1 U T08
2017-11-10 08:55:40 C 01 05 27.25 -15 07 00.0 U T08
2017-11-10 09:06:56 C 01 05 27.63 -15 06 54.9 U T08
2017-11-10 09:18:11 C 01 05 28.02 -15 06 49.9 U T08
2017-11-12 16:40:58 C 01 07 46.77 -14 42 49.3 q C97
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)