Asteroids

2021VH2 help

Last update: 2024-04-30 19:31 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.933

Aphelion (Q)

1.093

Eccentricity (e)

0.079

Inclination (i)

1.3

deg

Orbit period (P)

372.5

Earth MOID

0.00112

U parameter

2.2

Next Earth close approach

Date

2056-11-14

Nominal distance (from Earth center)

0.02136

3194699

Maximum Brightness

23.3

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

28.7

mag

Diameter

5 - 11*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-11-05

Observatory

Mt. Lemmon Survey

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

1.013242

1-sigma variation

1.084E-7

Unit

Eccentricity (e)

Value

0.079170

1-sigma variation

0.000001

Unit

Inclination (i)

Value

1.3140

1-sigma variation

1.405E-5

Unit

Long. of Ascending Node (Ω)

Value

222.9019

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

260.6464

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

56.82619

1-sigma variation

0.00030

Unit

Perihelion distance

Value

0.933023

1-sigma variation

Unit

Aphelion distance

Value

1.093460

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.011948

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.003273

1-sigma variation

Unit

MOID

Value

0.001122

1-sigma variation

Unit

Orbit Period

Value

372.5357

1-sigma variation

Unit

U parameter

Value

2.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.17540E-14	6.99206E-14	1.52275E-12	1.20224E-11	9.63415E-12	-3.29370E-11
e	6.99206E-14	4.15992E-13	9.05891E-12	7.15256E-11	5.72996E-11	-1.95919E-10
i	1.52275E-12	9.05891E-12	1.97472E-10	1.55773E-9	1.24808E-9	-4.26716E-9
Ω	1.20224E-11	7.15256E-11	1.55773E-9	1.23268E-8	9.82357E-9	-3.36869E-8
ω	9.63415E-12	5.72996E-11	1.24808E-9	9.82357E-9	7.93055E-9	-2.70020E-8
M	-3.29370E-11	-1.95919E-10	-4.26716E-9	-3.36869E-8	-2.70020E-8	9.23014E-8

Date of computation: 2024-04-25 08:07 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

28.734

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

5 - 11*

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

301

Unit

Source

[1]

Unobserved

Value

615

Unit

Source

[1]

Normalized RMS of residuals

Value

0.435474

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-10-27.45697

Unit

Source

[2]

Last Observation

Value

2022-08-24.380275

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

42 (0)

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 2021VH2 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
EARTH	1962-11-02 11:58	532.1	0.1967542	0.1335562	0.0210756
EARTH	1963-09-01 15:02	> 1 w	0.0946499	0.0915040	0.0010492
EARTH	1964-03-28 00:39	1032.1	0.0176530	0.0159252	0.0014068
EARTH	1983-12-29 10:60	810.1	0.0380882	0.0378077	0.0000936
EARTH	1984-05-09 13:29	800.5	0.0726551	0.0721716	0.0001614
EARTH	2002-10-29 18:10	2.3	0.1432056	0.1431635	0.0000140
EARTH	2003-08-01 19:27	43.2	0.1056894	0.1056727	0.0000056
EARTH	2004-03-28 01:22	3.3	0.0563164	0.0562225	0.0000313
EARTH	2021-11-11 04:29	< 1 s	0.0074971	0.0074970	0.0000000
EARTH	2022-08-30 23:19	< 1 min	0.0743690	0.0743663	0.0000009
EARTH	2023-02-08 12:25	1.1	0.0553081	0.0553063	0.0000006
EARTH	2023-06-23 15:15	< 1 min	0.0684847	0.0684825	0.0000007
EARTH	2024-04-25 09:01	< 1 min	0.0238294	0.0238276	0.0000006
EARTH	2056-11-14 21:35	3.2	0.0213552	0.0212522	0.0000344
EARTH	2057-09-21 03:18	254.1	0.0657217	0.0655803	0.0000471
EARTH	2058-01-25 03:25	332.8	0.0553492	0.0553272	0.0000073
EARTH	2058-07-18 16:24	492.0	0.0759748	0.0759257	0.0000164
EARTH	2059-04-28 20:40	9.0	0.0087891	0.0080291	0.0002534
EARTH	2060-03-26 14:21	> 1 w	0.0467600	0.0377338	0.0030315
EARTH	2060-05-25 03:01	> 1 d	0.0430947	0.0358500	0.0024363
EARTH	2061-02-02 19:30	> 1 w	0.0691665	0.0659568	0.0010700
EARTH	2061-07-09 05:60	> 1 w	0.0602260	0.0595700	0.0002293
EARTH	2061-12-25 20:21	> 1 w	0.0696138	0.0671091	0.0008616
EARTH	2062-08-22 15:42	> 1 w	0.0504146	0.0407292	0.0032313
EARTH	2062-11-12 04:16	> 1 w	0.0504442	0.0395714	0.0038427
EARTH	2063-10-02 08:48	1279.1	0.0147791	0.0100549	0.0035100
EARTH	2064-09-30 20:10	> 1 d	0.0173179	0.0107242	0.0045951
EARTH	2065-08-08 03:33	> 1 w	0.0591629	0.0561092	0.0012744
EARTH	2065-11-12 07:04	> 1 w	0.0494900	0.0432544	0.0020858
EARTH	2066-06-23 07:04	> 1 d	0.0719918	0.0718982	0.0001666
EARTH	2066-12-25 23:23	> 1 d	0.0591881	0.0589801	0.0002806
EARTH	2067-05-14 23:55	> 1 w	0.0633053	0.0590266	0.0014373
EARTH	2068-03-29 14:09	> 1 w	0.0344697	0.0221404	0.0049836
EARTH	2069-03-12 20:17	> 1 d	0.0139226	0.0138778	0.0004294
EARTH	2070-03-10 18:53	465.6	0.0540653	0.0139028	0.0447518
EARTH	2071-03-13 20:38	> 1 d	0.1343482	0.0128780	0.0595002

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