Asteroids

2021GE3 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.691

Aphelion (Q)

2.595

Eccentricity (e)

0.580

Inclination (i)

34.4

deg

Orbit period (P)

769.2

Earth MOID

0.04426

U parameter

7.8

Next Earth close approach

Date

2037-10-23

Nominal distance (from Earth center)

0.15831

23683544

Maximum Brightness

20.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.6

mag

Diameter

80 - 180*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-05

Observatory

University of Arizona 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

1.642965

1-sigma variation

0.001206

Unit

Eccentricity (e)

Value

0.579525

1-sigma variation

0.000309

Unit

Inclination (i)

Value

34.4339

1-sigma variation

0.0142

Unit

Long. of Ascending Node (Ω)

Value

20.3547

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

92.5337

1-sigma variation

0.0159

Unit

Mean Anomaly (M)

Value

188.39774

1-sigma variation

1.00700

Unit

Perihelion distance

Value

0.690826

1-sigma variation

Unit

Aphelion distance

Value

2.595104

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.121760

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.062236

1-sigma variation

Unit

MOID

Value

0.044255

1-sigma variation

Unit

Orbit Period

Value

769.2029

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.45376E-6	3.72510E-7	1.70895E-5	-3.96324E-7	1.91426E-5	-1.21416E-3
e	3.72510E-7	9.54520E-8	4.37900E-6	-1.01554E-7	4.90507E-6	-3.11116E-4
i	1.70895E-5	4.37900E-6	2.00895E-4	-4.65904E-6	2.25029E-4	-1.42729E-2
Ω	-3.96324E-7	-1.01554E-7	-4.65904E-6	1.08058E-7	-5.21867E-6	3.31006E-4
ω	1.91426E-5	4.90507E-6	2.25029E-4	-5.21867E-6	2.52070E-4	-1.59877E-2
M	-1.21416E-3	-3.11116E-4	-1.42729E-2	3.31006E-4	-1.59877E-2	1.01406E0

Date of computation: 2026-06-04 23:11 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

22.564

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

80 - 180*

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

1911

Unit

Source

[1]

Normalized RMS of residuals

Value

0.724416

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-04-05.443253

Unit

Source

[2]

Last Observation

Value

2021-04-25.17028

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

150 (2)

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2021GE3 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	1957-10-17 22:29	> 1 w	0.0838408	0.0801955	0.1004128
EARTH	1981-04-05 08:10	> 1 w	0.0774130	0.0453376	0.2301374
EARTH	1997-10-20 20:55	> 1 d	0.1009085	0.0822066	0.0887174
EARTH	2021-04-07 19:00	< 1 s	0.0438960	0.0438389	0.0000190
EARTH	2037-10-23 09:23	> 1 d	0.1583147	0.0819786	0.0977313
EARTH	2056-10-13 00:35	> 1 w	0.1638654	0.0835707	0.1901387
EARTH	2061-04-11 14:03	> 1 w	0.1004249	0.0413872	0.2192246
EARTH	2080-03-31 16:31	> 1 w	0.1696266	0.0363200	0.2430573
EARTH	2096-10-17 18:59	> 1 w	0.0891260	0.0877044	0.0346902
EARTH	2120-04-06 05:22	> 1 w	0.0643746	0.0399412	0.1555447

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
50.20631815	95.63135715	0.04315490	MINIMUM
308.15172424	284.86546168	0.08363396	MINIMUM
358.97420056	9.42409828	0.56920851	SADDLE
359.75785004	191.20116216	1.63498661	SADDLE
179.38979554	191.82879568	1.84710528	SADDLE
180.57038611	12.56908500	3.45199385	MAXIMUM

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MOID Plots

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