Asteroids

2021VH2 help

Last update: 2025-03-17 23:53 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.939

Aphelion (Q)

1.100

Eccentricity (e)

0.079

Inclination (i)

1.3

deg

Orbit period (P)

376.1

Earth MOID

0.00420

U parameter

0.5

Next Earth close approach

Date

2056-11-14

Nominal distance (from Earth center)

0.02136

3195366

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 VISUALISATION TOOLS

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.019727

1-sigma variation

7.796E-9

Unit

Eccentricity (e)

Value

0.078718

1-sigma variation

3.131E-8

Unit

Inclination (i)

Value

1.3265

1-sigma variation

7.182E-7

Unit

Long. of Ascending Node (Ω)

Value

222.4417

1-sigma variation

6.946E-6

Unit

Arg. of Perihelion (ω)

Value

265.0300

1-sigma variation

7.129E-6

Unit

Mean Anomaly (M)

Value

76.24143

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.939457

1-sigma variation

Unit

Aphelion distance

Value

1.099998

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.012495

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.014874

1-sigma variation

Unit

MOID

Value

0.004198

1-sigma variation

Unit

Orbit Period

Value

376.1183

1-sigma variation

Unit

U parameter

Value

0.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.07751E-17	1.71939E-16	3.09820E-15	2.10585E-14	3.46559E-14	-9.82028E-14
e	1.71939E-16	9.80007E-16	1.78906E-14	1.46071E-13	6.57054E-14	-3.95481E-13
i	3.09820E-15	1.78906E-14	5.15789E-13	2.81333E-12	1.16917E-12	-7.30285E-12
Ω	2.10585E-14	1.46071E-13	2.81333E-12	4.82486E-11	-1.97608E-11	-5.42159E-11
ω	3.46559E-14	6.57054E-14	1.16917E-12	-1.97608E-11	5.08260E-11	-5.12567E-11
M	-9.82028E-14	-3.95481E-13	-7.30285E-12	-5.42159E-11	-5.12567E-11	1.89269E-10

Date of computation: 2025-02-19 13:28 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

28.707

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

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	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

917

Unit

Source

[1]

Unobserved

Value

321

Unit

Source

[1]

Normalized RMS of residuals

Value

0.563197

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

2024-05-01.286577

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

47 (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

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

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 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1962-11-02 09:39	60.6	0.1943679	0.1873129	0.0023518
EARTH	1963-08-31 22:37	> 1 d	0.0947637	0.0944411	0.0001075
EARTH	1964-03-28 02:43	108.7	0.0174998	0.0170914	0.0001451
EARTH	1983-12-29 10:04	86.9	0.0380777	0.0380473	0.0000101
EARTH	1984-05-09 13:59	85.2	0.0726728	0.0726214	0.0000172
EARTH	2002-10-29 18:10	< 1 min	0.1432044	0.1432008	0.0000012
EARTH	2003-08-01 19:26	4.5	0.1056899	0.1056884	0.0000005
EARTH	2004-03-28 01:22	< 1 min	0.0563199	0.0563097	0.0000034
EARTH	2021-11-11 04:29	< 1 s	0.0074971	0.0074971	0.0000000
EARTH	2022-08-30 23:19	< 1 min	0.0743690	0.0743689	0.0000000
EARTH	2023-02-08 12:25	< 1 min	0.0553080	0.0553080	0.0000000
EARTH	2023-06-23 15:15	< 1 min	0.0684846	0.0684845	0.0000000
EARTH	2024-04-25 09:01	< 1 s	0.0238295	0.0238294	0.0000000
EARTH	2056-11-14 21:34	< 1 min	0.0213597	0.0213531	0.0000022
EARTH	2057-09-21 03:06	16.2	0.0657277	0.0657189	0.0000029
EARTH	2058-01-25 03:43	21.3	0.0553500	0.0553488	0.0000004
EARTH	2058-07-18 16:03	31.5	0.0759725	0.0759691	0.0000011
EARTH	2059-04-28 20:41	< 1 min	0.0087560	0.0087073	0.0000163
EARTH	2060-03-25 14:26	784.5	0.0471539	0.0465771	0.0001923
EARTH	2060-05-25 17:26	652.5	0.0434118	0.0429467	0.0001551
EARTH	2061-02-02 08:01	1067.9	0.0693062	0.0691005	0.0000686
EARTH	2061-07-09 19:32	1005.8	0.0602534	0.0602168	0.0000123
EARTH	2061-12-25 07:21	1217.8	0.0694984	0.0693247	0.0000580
EARTH	2062-08-23 15:12	1270.8	0.0499805	0.0493236	0.0002190
EARTH	2062-11-11 06:29	1331.0	0.0499306	0.0491598	0.0002577
EARTH	2063-10-02 05:50	82.8	0.0143232	0.0136724	0.0002222
EARTH	2064-09-30 13:51	207.6	0.0166136	0.0154494	0.0003988
EARTH	2065-08-09 01:15	> 1 d	0.0588371	0.0580689	0.0002577
EARTH	2065-11-11 10:24	> 1 d	0.0490742	0.0482031	0.0002905
EARTH	2066-06-23 07:59	652.6	0.0719961	0.0719764	0.0000092
EARTH	2066-12-25 14:25	> 1 d	0.0591780	0.0591457	0.0000116
EARTH	2067-05-14 17:03	41.0	0.0632252	0.0631386	0.0000301
EARTH	2068-03-29 01:41	34.2	0.0340921	0.0340735	0.0000062
EARTH	2069-03-12 16:28	89.4	0.0140139	0.0138430	0.0000612
EARTH	2070-03-10 19:20	18.7	0.0590582	0.0535845	0.0018293
EARTH	2071-03-14 01:28	32.6	0.1412384	0.1333833	0.0026189

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
286.55597109	304.64315942	0.00112205	MINIMUM
85.58089744	110.90229730	0.00397517	MINIMUM
6.51551047	28.24584974	0.05564149	SADDLE
185.55850687	207.22958431	0.08189809	SADDLE
6.28634108	207.98721176	1.94799834	SADDLE
184.95125601	26.64802106	2.07743436	MAXIMUM

Download:

MOID Plots

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