Asteroids

2021GE3 help

Last update: 2025-04-09 07:59 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.691

Aphelion (Q)

2.595

Eccentricity (e)

0.580

Inclination (i)

34.4

deg

Orbit period (P)

769.1

Earth MOID

0.04404

U parameter

7.8

Next Earth close approach

Date

2037-10-23

Nominal distance (from Earth center)

0.15826

23675609

Maximum Brightness

20.6

mag

Risk

Object is not in risk list

Object is not in priority 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

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.642852

1-sigma variation

0.001206

Unit

Eccentricity (e)

Value

0.579561

1-sigma variation

0.000310

Unit

Inclination (i)

Value

34.4365

1-sigma variation

0.0142

Unit

Long. of Ascending Node (Ω)

Value

20.3683

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

92.5134

1-sigma variation

0.0160

Unit

Mean Anomaly (M)

Value

1.19725

1-sigma variation

0.80119

Unit

Perihelion distance

Value

0.690719

1-sigma variation

Unit

Aphelion distance

Value

2.594985

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.122102

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.061955

1-sigma variation

Unit

MOID

Value

0.044041

1-sigma variation

Unit

Orbit Period

Value

769.1237

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.45469E-6	3.73386E-7	1.71113E-5	-4.84609E-7	1.92482E-5	-9.66320E-4
e	3.73386E-7	9.58400E-8	4.39210E-6	-1.24389E-7	4.94055E-6	-2.48033E-4
i	1.71113E-5	4.39210E-6	2.01280E-4	-5.70050E-6	2.26413E-4	-1.13667E-2
Ω	-4.84609E-7	-1.24389E-7	-5.70050E-6	1.61453E-7	-6.41227E-6	3.21916E-4
ω	1.92482E-5	4.94055E-6	2.26413E-4	-6.41227E-6	2.54694E-4	-1.27862E-2
M	-9.66320E-4	-2.48033E-4	-1.13667E-2	3.21916E-4	-1.27862E-2	6.41907E-1

Date of computation: 2025-04-09 07:59 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

22.563

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

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

1528

Unit

Source

[1]

Normalized RMS of residuals

Value

0.724366

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

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 2021GE3 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	1957-10-17 22:40	> 1 w	0.0837865	0.0801965	0.0997517
EARTH	1981-04-05 08:19	> 1 w	0.0772881	0.0453411	0.2298603
EARTH	1997-10-20 20:59	> 1 d	0.1009567	0.0822054	0.0888048
EARTH	2021-04-07 19:00	< 1 s	0.0438960	0.0438389	0.0000190
EARTH	2037-10-23 09:20	> 1 d	0.1582617	0.0819806	0.0977192
EARTH	2056-10-13 00:28	> 1 w	0.1639687	0.0835666	0.1901897
EARTH	2061-04-11 13:55	> 1 w	0.1003059	0.0413910	0.2191817
EARTH	2080-03-31 16:23	> 1 w	0.1697585	0.0363114	0.2429930
EARTH	2096-10-17 18:53	> 1 w	0.0891448	0.0877038	0.0348985
EARTH	2120-04-06 05:15	> 1 w	0.0644588	0.0399390	0.1553532

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
50.15486830	95.02363416	0.04440730	MINIMUM
308.19819616	284.34928656	0.08435678	MINIMUM
358.96875523	8.86768545	0.56851375	SADDLE
359.74079695	190.61970224	1.63376516	SADDLE
179.38974360	191.25749426	1.84790724	SADDLE
180.55940003	11.99121347	3.45102923	MAXIMUM

Download:

MOID Plots

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