Asteroids

2021GV help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.597

Aphelion (Q)

3.186

Eccentricity (e)

0.684

Inclination (i)

3.2

deg

Orbit period (P)

950.3

Earth MOID

0.00097

U parameter

7.5

Next Earth close approach

Date

2039-10-14

Nominal distance (from Earth center)

0.13148

19669605

Maximum Brightness

27.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

29.1

mag

Diameter

4 - 9*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-03

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.891693

1-sigma variation

0.001156

Unit

Eccentricity (e)

Value

0.684244

1-sigma variation

0.000236

Unit

Inclination (i)

Value

3.2208

1-sigma variation

0.0012

Unit

Long. of Ascending Node (Ω)

Value

192.5833

1-sigma variation

0.0032

Unit

Arg. of Perihelion (ω)

Value

91.5240

1-sigma variation

0.0037

Unit

Mean Anomaly (M)

Value

262.03532

1-sigma variation

0.56602

Unit

Perihelion distance

Value

0.597314

1-sigma variation

Unit

Aphelion distance

Value

3.186072

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.023475

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.011889

1-sigma variation

Unit

MOID

Value

0.000965

1-sigma variation

Unit

Orbit Period

Value

950.3298

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.33718E-6	2.73021E-7	1.36919E-6	-3.64376E-6	4.19016E-6	-6.54524E-4
e	2.73021E-7	5.57527E-8	2.80467E-7	-7.43852E-7	8.57252E-7	-1.33639E-4
i	1.36919E-6	2.80467E-7	1.52591E-6	-3.71376E-6	4.48157E-6	-6.70197E-4
Ω	-3.64376E-6	-7.43852E-7	-3.71376E-6	9.93176E-6	-1.13935E-5	1.78355E-3
ω	4.19016E-6	8.57252E-7	4.48157E-6	-1.13935E-5	1.34952E-5	-2.05101E-3
M	-6.54524E-4	-1.33639E-4	-6.70197E-4	1.78355E-3	-2.05101E-3	3.20377E-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

29.096

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

4 - 9*

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

0.9

Unit

Source

[1]

Unobserved

Value

1670

Unit

Source

[1]

Normalized RMS of residuals

Value

0.658825

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-04-03.277621

Unit

Source

[2]

Last Observation

Value

2021-04-04.134942

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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 2021GV 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	1954-10-07 10:40	> 1 d	0.0076363	0.0019586	0.0225846
EARTH	1972-09-29 05:08	841.1	0.1188898	0.0932787	0.0085370
VENUS	1998-03-24 00:30	> 1 d	0.0393048	0.0036330	0.0228131
VENUS	2013-08-15 22:00	> 1 d	0.0373975	0.0037287	0.0459418
EARTH	2021-04-04 17:22	< 1 min	0.0022419	0.0022397	0.0000007
VENUS	2026-07-14 23:51	> 1 d	0.0101328	0.0038120	0.0304925
EARTH	2039-10-14 03:06	> 1 mo	0.1314832	0.0016248	0.6911187
MARS	2066-01-05 16:32	> 1 w	0.0383447	0.0330643	0.1829906
EARTH	2068-04-03 12:48	> 1 w	0.0238499	0.0040545	0.3795847
EARTH	2081-04-14 03:09	> 1 mo	0.1373991	0.0031009	2.4760019
EARTH	2086-10-03 21:22	> 1 mo	0.0613873	0.0038407	4.2440432
EARTH	2099-10-12 10:23	> 1 mo	0.0836434	0.0042000	3.9099749

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
46.34548291	272.05235878	0.00059687	MINIMUM
313.58036001	91.50371353	0.00189778	MINIMUM
359.93845683	181.73898131	0.42000466	SADDLE
359.94704120	1.75777023	1.58164463	SADDLE
179.98825504	1.81861406	2.20530558	SADDLE
179.99094831	181.81947376	4.20180842	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out