Asteroids

2021GM10 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.952

Aphelion (Q)

1.315

Eccentricity (e)

0.160

Inclination (i)

7.0

deg

Orbit period (P)

441.0

Earth MOID

0.03097

U parameter

7.3

Next Earth close approach

Date

2027-08-03

Nominal distance (from Earth center)

0.12107

18111449

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.7

mag

Diameter

30 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-13

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

1.133882

1-sigma variation

0.000268

Unit

Eccentricity (e)

Value

0.160167

1-sigma variation

0.000262

Unit

Inclination (i)

Value

7.0478

1-sigma variation

0.0083

Unit

Long. of Ascending Node (Ω)

Value

62.1348

1-sigma variation

0.0026

Unit

Arg. of Perihelion (ω)

Value

213.3261

1-sigma variation

0.0046

Unit

Mean Anomaly (M)

Value

238.28555

1-sigma variation

0.45838

Unit

Perihelion distance

Value

0.952271

1-sigma variation

Unit

Aphelion distance

Value

1.315493

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.288115

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.039721

1-sigma variation

Unit

MOID

Value

0.030969

1-sigma variation

Unit

Orbit Period

Value

441.0117

1-sigma variation

Unit

U parameter

Value

7.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.19718E-8	7.03299E-8	2.22575E-6	6.91910E-7	-1.22250E-6	-1.22971E-4
e	7.03299E-8	6.87257E-8	2.17500E-6	6.76041E-7	-1.19443E-6	-1.20166E-4
i	2.22575E-6	2.17500E-6	6.88379E-5	2.13623E-5	-3.77653E-5	-3.80291E-3
Ω	6.91910E-7	6.76041E-7	2.13623E-5	6.88746E-6	-1.19948E-5	-1.18220E-3
ω	-1.22250E-6	-1.19443E-6	-3.77653E-5	-1.19948E-5	2.10537E-5	2.08875E-3
M	-1.22971E-4	-1.20166E-4	-3.80291E-3	-1.18220E-3	2.08875E-3	2.10108E-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

24.699

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

30 - 70*

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

1602

Unit

Source

[1]

Normalized RMS of residuals

Value

0.464037

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-04-13.361179

Unit

Source

[2]

Last Observation

Value

2021-04-29.85988

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

56 (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 2021GM10 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	1969-05-17 15:52	> 1 d	0.0339082	0.0311862	0.0019565
EARTH	1975-08-29 00:41	> 1 d	0.1314768	0.1242016	0.0053710
EARTH	1992-04-23 05:42	> 1 d	0.1709148	0.0589584	0.0405814
EARTH	1998-06-07 11:36	> 1 w	0.0722087	0.0499367	0.0246882
EARTH	1998-10-05 09:02	> 1 w	0.1898281	0.1570628	0.0211176
EARTH	2004-09-06 05:51	> 1 d	0.1884397	0.1299793	0.0264925
EARTH	2021-05-10 20:21	< 1 min	0.0326155	0.0324883	0.0000424
EARTH	2027-08-03 01:29	> 1 d	0.1210676	0.1184268	0.0021990
EARTH	2050-05-05 12:01	> 1 w	0.0559542	0.0321565	0.0481996
EARTH	2056-06-23 18:52	> 1 w	0.0964297	0.0755419	0.0110840
EARTH	2056-09-19 07:13	> 1 w	0.1665473	0.1405243	0.0126800
EARTH	2062-09-05 01:20	612.3	0.1614989	0.1400169	0.0085871
EARTH	2085-05-05 11:23	> 1 w	0.0546054	0.0315849	0.1081080
EARTH	2091-06-11 05:28	> 1 w	0.0793703	0.0546309	0.0308264
EARTH	2091-10-04 21:01	> 1 w	0.1836364	0.1517911	0.0265738
EARTH	2097-08-29 08:13	> 1 d	0.1300691	0.1253705	0.0096926
EARTH	2120-04-23 02:24	> 1 w	0.1932184	0.0441641	0.3378143

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
323.29210458	129.92646203	0.02978473	MINIMUM
187.80648653	359.62939986	0.34211732	SADDLE
1.79801030	355.01890447	1.93474664	SADDLE
179.50574266	172.66918629	2.33036164	MAXIMUM

Download:

MOID Plots

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