Asteroids

2021VP8 help

Last update: 2024-04-25 23:56 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.641

Aphelion (Q)

1.075

Eccentricity (e)

0.253

Inclination (i)

2.2

deg

Orbit period (P)

290.4

Earth MOID

0.00384

U parameter

6.6

Next Earth close approach

Date

2025-11-22

Nominal distance (from Earth center)

0.1135

16979521

Maximum Brightness

25.2

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.2

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-11-11

Observatory

MAP, San Pedro de Atacama

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.858172

1-sigma variation

0.000048

Unit

Eccentricity (e)

Value

0.252638

1-sigma variation

0.000124

Unit

Inclination (i)

Value

2.1943

1-sigma variation

0.0012

Unit

Long. of Ascending Node (Ω)

Value

64.4358

1-sigma variation

0.0032

Unit

Arg. of Perihelion (ω)

Value

131.4361

1-sigma variation

0.0057

Unit

Mean Anomaly (M)

Value

230.14053

1-sigma variation

0.09618

Unit

Perihelion distance

Value

0.641365

1-sigma variation

Unit

Aphelion distance

Value

1.074979

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.020986

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.324929

1-sigma variation

Unit

MOID

Value

0.003836

1-sigma variation

Unit

Orbit Period

Value

290.3755

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.25632E-9	-5.88304E-9	-5.68592E-8	1.49727E-7	-2.70107E-7	-4.56845E-6
e	-5.88304E-9	1.53432E-8	1.48319E-7	-3.90565E-7	7.04060E-7	1.19125E-5
i	-5.68592E-8	1.48319E-7	1.43405E-6	-3.77650E-6	6.80366E-6	1.15139E-4
Ω	1.49727E-7	-3.90565E-7	-3.77650E-6	9.94666E-6	-1.79184E-5	-3.03195E-4
ω	-2.70107E-7	7.04060E-7	6.80366E-6	-1.79184E-5	3.23491E-5	5.46849E-4
M	-4.56845E-6	1.19125E-5	1.15139E-4	-3.03195E-4	5.46849E-4	9.25007E-3

Date of computation: 2024-04-23 10:08 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

26.224

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

15 - 30*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

882

Unit

Source

[1]

Normalized RMS of residuals

Value

0.767645

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-11-11.11148

Unit

Source

[2]

Last Observation

Value

2021-11-26.07498

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

40 (1)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close approaches for 2021VP8 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
VENUS	1951-07-18 10:23	> 1 mo	0.0259624	0.0024631	17.7567258
EARTH	1960-11-20 07:58	> 1 mo	0.0464713	0.0016475	10.8836495
EARTH	1964-09-01 20:49	> 1 mo	0.0465920	0.0396114	2.1822394
VENUS	1966-11-30 14:25	> 1 mo	0.0050261	0.0031034	0.7828671
EARTH	1968-09-01 10:26	> 1 w	0.1975983	0.1521011	0.0185064
EARTH	1989-11-24 16:25	> 1 mo	0.1494757	0.0034855	4.0914056
EARTH	1993-11-26 03:33	> 1 w	0.0481922	0.0046511	1.3118242
VENUS	1995-11-02 00:32	> 1 w	0.0184835	0.0022953	0.4281236
EARTH	1997-11-17 04:11	> 1 mo	0.0504002	0.0016288	1.1401568
VENUS	1998-01-26 07:16	> 1 mo	0.0345910	0.0099661	1.7185424
EARTH	2001-10-11 14:02	> 1 mo	0.0934727	0.0885630	0.0408185
EARTH	2005-09-06 01:16	> 1 w	0.0530413	0.0354941	0.0630099
VENUS	2006-04-15 00:24	> 1 w	0.0089905	0.0033069	0.0695065
EARTH	2009-09-03 05:41	> 1 d	0.0425994	0.0409317	0.0076689
EARTH	2013-09-04 03:25	> 1 d	0.0448649	0.0439648	0.0013585
VENUS	2014-04-14 13:14	713.0	0.0058927	0.0043079	0.0027556
EARTH	2017-10-06 02:49	1222.0	0.0821975	0.0818581	0.0001151
EARTH	2021-11-16 12:32	< 1 min	0.0314089	0.0313613	0.0000159
VENUS	2022-01-22 03:46	42.9	0.0276850	0.0275278	0.0000525
EARTH	2025-11-22 09:55	51.1	0.1135011	0.1076027	0.0019661
EARTH	2040-09-01 10:12	55.5	0.1842843	0.1804108	0.0012919
VENUS	2041-02-20 11:30	138.9	0.0150086	0.0134960	0.0005265
EARTH	2044-08-29 20:36	9.8	0.0943596	0.0918527	0.0008376
VENUS	2046-11-24 14:36	299.5	0.0369656	0.0287703	0.0027378
EARTH	2048-08-30 06:43	99.2	0.0475422	0.0446055	0.0010451
EARTH	2052-08-31 03:43	74.7	0.0401455	0.0395161	0.0002269
VENUS	2054-11-21 22:07	96.1	0.0172254	0.0158561	0.0004604
EARTH	2056-08-29 14:30	17.4	0.0583453	0.0568430	0.0005078
EARTH	2060-08-30 14:08	90.9	0.1423917	0.1334474	0.0029903
EARTH	2081-11-22 20:07	119.2	0.1824477	0.1716063	0.0036139
EARTH	2085-11-25 10:11	23.2	0.0707831	0.0676017	0.0010605
VENUS	2086-01-19 05:21	227.6	0.0113930	0.0103280	0.0005437
EARTH	2089-11-16 17:57	> 1 d	0.0438508	0.0281098	0.0052507
EARTH	2093-10-04 12:29	> 1 d	0.0898570	0.0869595	0.0009898
VENUS	2096-07-07 04:34	> 1 d	0.0215386	0.0100744	0.0067719
EARTH	2097-08-28 20:03	81.2	0.0493462	0.0447912	0.0017407
VENUS	2107-03-10 00:59	> 1 d	0.0358873	0.0052671	0.0321594
EARTH	2110-11-27 08:05	523.1	0.0487970	0.0464109	0.0008060
EARTH	2114-10-08 11:56	> 1 w	0.0942912	0.0918820	0.0009943
EARTH	2118-08-29 21:06	692.6	0.0909099	0.0396783	0.0485209

Download as:

2021VP8

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2073-11-25.332	78536.332	-2.968	1.80 ± 0.002	6.03E5	1.76E-8	2.98E-9	-8.56
2076-11-20.095	79627.095	-3.506	0.81 ± 0.001	2.48E5	1.29E-8	2.15E-9	-8.72
2077-11-25.282	79997.282	-2.967	1.54 ± 0.013	2.25E7	6.54E-10	1.11E-10	-10.02
2086-11-25.743	83284.743	-3.103	1.85 ± 0.008	2.01E5	2.38E-8	4.05E-9	-8.52
2110-11-26.850	92050.850	-2.453	1.22 ± 0.003	7.96E3	7.91E-6	1.35E-6	-6.13
2110-11-26.861	92050.861	2.405	1.64 ± 0.002	2.29E4	3.05E-6	5.20E-7	-6.55


Based on 40 optical observations (of which 1 are rejected as outliers) from 2021/11/11.111 to 2021/11/26.075.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.97 and 1.97 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20240110 090430.771 UTC.

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