Asteroids

2021GQ10 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.922

Aphelion (Q)

1.038

Eccentricity (e)

0.059

Inclination (i)

11.9

deg

Orbit period (P)

354.3

Earth MOID

0.00085

U parameter

4.3

Next Earth close approach

Date

2053-04-15

Nominal distance (from Earth center)

0.07053

10550679

Maximum Brightness

23.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.5

mag

Diameter

13 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-14

Observatory

Tokyo-Kiso

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

0.979824

1-sigma variation

0.000002

Unit

Eccentricity (e)

Value

0.058993

1-sigma variation

0.000003

Unit

Inclination (i)

Value

11.8999

1-sigma variation

0.0012

Unit

Long. of Ascending Node (Ω)

Value

204.0286

1-sigma variation

4.098E-5

Unit

Arg. of Perihelion (ω)

Value

242.7554

1-sigma variation

0.0036

Unit

Mean Anomaly (M)

Value

19.47360

1-sigma variation

0.01013

Unit

Perihelion distance

Value

0.922021

1-sigma variation

Unit

Aphelion distance

Value

1.037627

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.000857

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.046026

1-sigma variation

Unit

MOID

Value

0.000848

1-sigma variation

Unit

Orbit Period

Value

354.2585

1-sigma variation

Unit

U parameter

Value

4.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.86734E-12	5.83168E-12	2.69520E-9	8.79281E-11	8.00712E-9	-2.23312E-8
e	5.83168E-12	7.49198E-12	3.40368E-9	1.11868E-10	9.78943E-9	-2.70156E-8
i	2.69520E-9	3.40368E-9	1.55612E-6	5.10342E-8	4.50111E-6	-1.24548E-5
Ω	8.79281E-11	1.11868E-10	5.10342E-8	1.67943E-9	1.47169E-7	-4.06762E-7
ω	8.00712E-9	9.78943E-9	4.50111E-6	1.47169E-7	1.32483E-5	-3.68373E-5
M	-2.23312E-8	-2.70156E-8	-1.24548E-5	-4.06762E-7	-3.68373E-5	1.02589E-4

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

26.511

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

13 - 30*

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

1646

Unit

Source

[1]

Normalized RMS of residuals

Value

0.471447

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-04-14.587153

Unit

Source

[2]

Last Observation

Value

2021-04-20.3687

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

105 (6)

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 2021GQ10 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	1958-10-20 12:48	> 1 d	0.0378171	0.0198356	0.0363910
EARTH	1959-04-10 19:53	897.1	0.1465663	0.0713003	0.0250888
EARTH	1959-10-14 09:00	> 1 d	0.1291994	0.1168149	0.0053296
EARTH	1960-04-14 17:48	709.3	0.0136124	0.0018663	0.0128157
EARTH	1989-10-21 15:13	15.1	0.0555826	0.0537051	0.0006358
EARTH	1990-04-09 01:31	24.2	0.1491189	0.1459968	0.0010407
EARTH	1990-10-10 01:46	170.6	0.1444134	0.1409607	0.0011527
EARTH	1991-04-16 20:53	86.1	0.0461911	0.0417976	0.0014645
EARTH	2019-10-23 15:26	6.9	0.1102205	0.1099713	0.0000831
EARTH	2020-10-13 23:33	< 1 min	0.0984980	0.0984185	0.0000265
EARTH	2021-04-14 05:28	< 1 s	0.0011635	0.0011631	0.0000001
EARTH	2021-10-21 13:05	4.1	0.0627178	0.0626708	0.0000157
EARTH	2022-04-15 07:29	1.7	0.1779100	0.1778485	0.0000205
EARTH	2022-09-30 10:56	9.8	0.1350189	0.1348905	0.0000428
EARTH	2053-04-15 08:25	20.0	0.0705269	0.0685671	0.0006533
EARTH	2053-11-01 02:07	114.9	0.1240787	0.1223949	0.0005624
EARTH	2054-04-13 22:38	5.7	0.1013051	0.0996001	0.0005683
EARTH	2054-10-09 11:50	89.4	0.0666779	0.0655641	0.0003748
EARTH	2085-04-17 11:41	106.7	0.1461195	0.1360357	0.0033613
EARTH	2085-11-13 21:55	520.5	0.1886355	0.1796945	0.0030027
EARTH	2086-04-13 19:48	38.9	0.0329599	0.0230381	0.0033079
EARTH	2086-10-16 10:55	487.9	0.0471369	0.0456945	0.0006757
EARTH	2087-09-23 23:32	30.0	0.1842148	0.1802072	0.0013413
EARTH	2116-04-15 01:10	820.0	0.0317221	0.0011300	0.0312827
EARTH	2116-10-26 08:57	> 1 d	0.0876160	0.0413656	0.0199704
EARTH	2117-04-14 19:11	105.4	0.1411338	0.0973446	0.0146036
EARTH	2117-10-05 03:29	88.2	0.1012037	0.0901789	0.0042717

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
114.19193086	100.86160677	0.00047830	MINIMUM
298.14791982	280.67562396	0.04498268	MINIMUM
24.95470315	10.75115940	0.20584562	SADDLE
207.44830289	190.61297511	0.21259902	SADDLE
4.49463649	169.06538899	1.92939773	SADDLE
160.83063696	325.31931949	2.01554173	MAXIMUM

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MOID Plots

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