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
2023-01-28 04:02:38 C 08 31 25.661 -39 52 28.70 V W68
2023-01-28 04:07:10 C 08 31 24.838 -39 52 35.26 V W68
2023-01-28 04:14:58 C 08 31 23.546 -39 52 46.02 V W68
2023-01-29 22:45:23 C 08 23 58.121 -40 51 20.77 V M22
2023-01-29 22:50:06 C 08 23 57.233 -40 51 27.43 V M22
2023-01-29 23:41:12 C 08 23 47.587 -40 52 35.98 V M22
2023-01-29 23:51:40 C 08 23 45.684 -40 52 50.20 V M22
2023-02-11 20:59:44 C 07 06 51.271 -46 31 35.54 V M22
2023-02-11 21:04:57 C 07 06 49.555 -46 31 38.68 V M22
2023-02-11 21:12:51 C 07 06 46.939 -46 31 43.25 V M22
2023-02-11 21:58:33 C 07 06 31.886 -46 32 13.81 V M22
2023-02-17 02:34:27 C 06 23 08.074 -47 22 57.76 V W68
2023-02-17 02:44:19 C 06 23 04.267 -47 22 58.58 V W68
2023-02-17 02:48:53 C 06 23 02.484 -47 22 59.05 V W68
2023-02-17 03:17:12 C 06 22 51.648 -47 23 01.25 V W68
2023-02-19 19:36:02 C 05 58 03.480 -47 17 44.56 V M22
2023-02-19 19:40:37 C 05 58 01.577 -47 17 43.33 V M22
2023-02-19 19:49:05 C 05 57 58.176 -47 17 40.49 V M22
2023-02-19 20:03:34 C 05 57 52.289 -47 17 36.13 V M22
2023-02-21 01:59:55 C 05 45 53.078 -47 06 38.63 V W68
2023-02-21 02:04:28 C 05 45 51.190 -47 06 35.96 V W68
2023-02-21 02:14:52 C 05 45 46.867 -47 06 31.21 V W68
2023-02-21 02:30:54 C 05 45 40.174 -47 06 22.68 V W68
2023-02-23 19:35:24 C 05 18 55.860 -46 22 18.48 V M22
2023-02-23 19:40:40 C 05 18 53.645 -46 22 13.55 V M22
2023-02-23 19:48:37 C 05 18 50.282 -46 22 06.20 V M22
2023-02-23 20:03:24 C 05 18 43.975 -46 21 52.24 V M22
2023-02-25 01:14:20 C 05 06 32.393 -45 52 45.52 V W68
2023-02-25 01:18:52 C 05 06 30.427 -45 52 40.22 V W68
2023-02-25 01:26:40 C 05 06 27.048 -45 52 31.80 V W68
2023-02-25 01:41:49 C 05 06 20.518 -45 52 14.56 V W68
2023-02-27 18:14:56 C 04 39 11.314 -44 26 20.22 V M22
2023-02-27 18:19:40 C 04 39 09.230 -44 26 13.24 V M22
2023-02-27 18:29:02 C 04 39 05.323 -44 25 57.79 V M22
2023-02-27 18:45:40 C 04 38 58.166 -44 25 31.66 V M22
2023-03-01 00:24:53 C 04 26 30.480 -43 36 04.07 V W68
2023-03-01 00:30:07 C 04 26 28.212 -43 35 53.77 V W68
2023-03-01 00:39:21 C 04 26 24.329 -43 35 37.32 V W68
2023-03-01 01:02:45 C 04 26 14.270 -43 34 55.02 V W68
2024-01-02 10:15:25 C 06 46 28.781 -15 17 09.63 X F52
2024-01-02 10:27:33 C 06 46 27.355 -15 17 12.22 X F52
2024-01-02 10:39:41 C 06 46 25.962 -15 17 14.81 X F52
2024-01-02 10:51:49 C 06 46 24.539 -15 17 17.44 X F52
2024-01-16 06:23:55 C 06 08 42.565 -15 14 35.63 V G96
2024-01-16 06:32:01 C 06 08 41.665 -15 14 33.76 V G96
2024-01-16 06:40:05 C 06 08 40.751 -15 14 31.78 V G96
2024-01-16 06:48:10 C 06 08 39.847 -15 14 30.16 V G96
2024-01-19 08:28:57 C 06 00 49.983 -14 54 11.21 X F52
2024-01-19 08:45:41 C 06 00 48.191 -14 54 05.77 X F52
2024-01-19 09:02:23 C 06 00 46.407 -14 54 00.51 X F52
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)