Asteroids

2021GN6 help

Last update: 2026-04-17 12:46 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.911

Aphelion (Q)

1.408

Eccentricity (e)

0.215

Inclination (i)

9.5

deg

Orbit period (P)

455.8

Earth MOID

0.01373

U parameter

0.5

Next Earth close approach

Date

2031-04-01

Nominal distance (from Earth center)

0.05741

8587844

Maximum Brightness

23.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 25*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-10

Observatory

Catalina Sky 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.159146

1-sigma variation

8.108E-9

Unit

Eccentricity (e)

Value

0.214500

1-sigma variation

0.000001

Unit

Inclination (i)

Value

9.4782

1-sigma variation

3.086E-5

Unit

Long. of Ascending Node (Ω)

Value

199.8930

1-sigma variation

2.856E-6

Unit

Arg. of Perihelion (ω)

Value

292.8240

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

93.54246

1-sigma variation

0.00006

Unit

Perihelion distance

Value

0.910509

1-sigma variation

Unit

Aphelion distance

Value

1.407783

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.019433

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.207790

1-sigma variation

Unit

MOID

Value

0.013731

1-sigma variation

Unit

Orbit Period

Value

455.8330

1-sigma variation

Unit

U parameter

Value

0.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.57388E-17	-2.46579E-15	8.73818E-14	3.03290E-15	4.87106E-13	-1.63037E-13
e	-2.46579E-15	3.04987E-13	7.56904E-12	3.16121E-13	-7.67114E-11	3.28453E-11
i	8.73818E-14	7.56904E-12	9.52339E-10	3.60351E-11	-2.46264E-9	1.25290E-9
Ω	3.03290E-15	3.16121E-13	3.60351E-11	8.15537E-12	-9.73665E-11	4.23153E-11
ω	4.87106E-13	-7.67114E-11	-2.46264E-9	-9.73665E-11	1.98884E-8	-8.73782E-9
M	-1.63037E-13	3.28453E-11	1.25290E-9	4.23153E-11	-8.73782E-9	3.92530E-9

Date of computation: 2026-04-17 12:46 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

26.862

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

11 - 25*

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

[-]

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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

1833

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.711944

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-04-10.318927

Unit

Source

[2]

Last Observation

Value

2026-04-17.39558

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

64 (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

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2021GN6 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1950-04-10 07:17	1.9	0.0502477	0.0501875	0.0000201
EARTH	1955-04-06 19:41	< 1 min	0.0147138	0.0147125	0.0000005
EARTH	1960-03-30 20:11	< 1 min	0.0675015	0.0674902	0.0000038
EARTH	1964-11-04 00:13	1.0	0.1719271	0.1719209	0.0000020
EARTH	1965-02-28 22:28	1.8	0.1486143	0.1486052	0.0000030
EARTH	1969-11-15 15:43	< 1 min	0.1213788	0.1213760	0.0000009
EARTH	1974-11-18 08:01	< 1 min	0.1297562	0.1297507	0.0000018
EARTH	2016-04-12 20:59	< 1 min	0.0966759	0.0966737	0.0000007
EARTH	2021-04-06 23:45	< 1 s	0.0139380	0.0139378	0.0000001
EARTH	2026-04-06 10:32	< 1 min	0.0144867	0.0144864	0.0000001
EARTH	2031-04-01 18:11	< 1 min	0.0574062	0.0574054	0.0000003
EARTH	2035-11-03 12:41	< 1 min	0.1788346	0.1788312	0.0000011
EARTH	2036-03-11 08:17	< 1 min	0.1353628	0.1353619	0.0000003
EARTH	2040-11-14 13:29	< 1 min	0.1295199	0.1295182	0.0000006
EARTH	2045-11-18 19:01	< 1 min	0.1279880	0.1279840	0.0000014
EARTH	2087-04-15 11:12	< 1 min	0.1250916	0.1250841	0.0000025
EARTH	2092-04-08 03:22	< 1 min	0.0250903	0.0250855	0.0000016
EARTH	2097-04-08 14:34	< 1 min	0.0279416	0.0279302	0.0000038
EARTH	2102-04-16 11:32	< 1 min	0.1301878	0.1301875	0.0000001

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
53.24023318	91.27561245	0.01373106	MINIMUM
295.39509748	312.26271102	0.11843522	MINIMUM
346.75420716	11.75564876	0.16962741	SADDLE
175.64493532	205.35147879	0.43385645	SADDLE
0.98460129	209.30014145	1.91972428	SADDLE
182.72082429	31.14950774	2.38685149	MAXIMUM

Download:

MOID Plots

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