Asteroids

2021VO12 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.811

Aphelion (Q)

3.106

Eccentricity (e)

0.586

Inclination (i)

5.1

deg

Orbit period (P)

1001.3

Earth MOID

0.01487

U parameter

7.3

Next Earth close approach

Date

2063-04-07

Nominal distance (from Earth center)

0.16027

23975523

Maximum Brightness

22.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.1

mag

Diameter

40 - 90*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-11-01

Observatory

Pan-STARRS 1, Haleakala

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.958779

1-sigma variation

0.000966

Unit

Eccentricity (e)

Value

0.585801

1-sigma variation

0.000229

Unit

Inclination (i)

Value

5.1448

1-sigma variation

0.0018

Unit

Long. of Ascending Node (Ω)

Value

235.6952

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

248.7036

1-sigma variation

0.0009

Unit

Mean Anomaly (M)

Value

148.44537

1-sigma variation

0.37422

Unit

Perihelion distance

Value

0.811324

1-sigma variation

Unit

Aphelion distance

Value

3.106233

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.622128

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.072033

1-sigma variation

Unit

MOID

Value

0.014872

1-sigma variation

Unit

Orbit Period

Value

1001.3282

1-sigma variation

Unit

U parameter

Value

7.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.32550E-7	2.21548E-7	1.75158E-6	-2.58221E-7	9.03780E-7	-3.61378E-4
e	2.21548E-7	5.26334E-8	4.16125E-7	-6.13463E-8	2.14717E-7	-8.58532E-5
i	1.75158E-6	4.16125E-7	3.29016E-6	-4.85079E-7	1.69787E-6	-6.78764E-4
Ω	-2.58221E-7	-6.13463E-8	-4.85079E-7	7.17945E-8	-2.50740E-7	1.00065E-4
ω	9.03780E-7	2.14717E-7	1.69787E-6	-2.50740E-7	8.78018E-7	-3.50229E-4
M	-3.61378E-4	-8.58532E-5	-6.78764E-4	1.00065E-4	-3.50229E-4	1.40040E-1

Date of computation: 2025-09-10 00:30 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

24.093

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

40 - 90*

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

Unit

Source

[1]

Unobserved

Value

1398

Unit

Source

[1]

Normalized RMS of residuals

Value

0.45725

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-11-01.49778

Unit

Source

[2]

Last Observation

Value

2021-11-27.998656

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

63 (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

[-]

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 2021VO12 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	1959-03-12 02:50	> 1 mo	0.1216869	0.0723265	0.2574884
EARTH	1969-12-08 03:29	> 1 mo	0.0869921	0.0071700	0.3404936
EARTH	2000-03-26 12:01	> 1 w	0.0709373	0.0708938	0.0031474
EARTH	2011-01-19 11:38	> 1 w	0.1834869	0.1638864	0.0068010
EARTH	2021-11-28 15:39	< 1 s	0.0187321	0.0187116	0.0000068
MARS	2033-04-07 19:39	> 1 d	0.0260882	0.0085577	0.0371310
EARTH	2063-04-07 17:48	> 1 d	0.1602665	0.0663088	0.0841474
EARTH	2074-03-19 02:52	> 1 w	0.0970385	0.0662986	0.0494505
EARTH	2085-02-04 22:38	> 1 w	0.1852759	0.1643893	0.0074992
EARTH	2095-12-29 08:23	> 1 w	0.1539266	0.0608888	0.0310846
EARTH	2106-11-25 06:32	> 1 d	0.0516167	0.0183467	0.0421826

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
327.58797162	323.43196910	0.01484738	MINIMUM
33.83103605	82.85560456	0.06908474	MINIMUM
1.77813003	25.08365959	0.18932457	SADDLE
0.75130282	203.09155799	1.82484034	SADDLE
180.26461544	202.33032240	2.09624374	SADDLE
180.10353335	22.24386635	4.08827929	MAXIMUM

Download:

MOID Plots

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