Asteroids

2021GE6 help

Last update: 2024-04-23 12:57 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.981

Aphelion (Q)

1.293

Eccentricity (e)

0.137

Inclination (i)

0.6

deg

Orbit period (P)

443.0

Earth MOID

0.00756

U parameter

7.6

Next Earth close approach

Date

2038-04-01

Nominal distance (from Earth center)

0.1009

15094540

Maximum Brightness

26.4

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

28.7

mag

Diameter

5 - 11*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-09

Observatory

Mt. Lemmon Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.137299

1-sigma variation

0.000402

Unit

Eccentricity (e)

Value

0.137258

1-sigma variation

0.000354

Unit

Inclination (i)

Value

0.5869

1-sigma variation

0.0028

Unit

Long. of Ascending Node (Ω)

Value

338.5400

1-sigma variation

0.1674

Unit

Arg. of Perihelion (ω)

Value

262.5078

1-sigma variation

0.1592

Unit

Mean Anomaly (M)

Value

130.94650

1-sigma variation

0.45211

Unit

Perihelion distance

Value

0.981195

1-sigma variation

Unit

Aphelion distance

Value

1.293403

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.127772

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.105790

1-sigma variation

Unit

MOID

Value

0.007556

1-sigma variation

Unit

Orbit Period

Value

443.0069

1-sigma variation

Unit

U parameter

Value

7.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.61302E-7	1.42178E-7	1.10186E-6	6.65051E-5	-6.31071E-5	-1.81577E-4
e	1.42178E-7	1.25329E-7	9.70432E-7	5.85580E-5	-5.55592E-5	-1.60052E-4
i	1.10186E-6	9.70432E-7	7.62374E-6	4.61912E-4	-4.39121E-4	-1.24008E-3
Ω	6.65051E-5	5.85580E-5	4.61912E-4	2.80184E-2	-2.66505E-2	-7.48424E-2
ω	-6.31071E-5	-5.55592E-5	-4.39121E-4	-2.66505E-2	2.53562E-2	7.10160E-2
M	-1.81577E-4	-1.60052E-4	-1.24008E-3	-7.48424E-2	7.10160E-2	2.04402E-1

Date of computation: 2024-04-23 10:08 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

28.677

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

5 - 11*

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 ODIM	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

1108

Unit

Source

[1]

Normalized RMS of residuals

Value

0.869865

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-04-09.247486

Unit

Source

[2]

Last Observation

Value

2021-04-11.227582

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

17 (1)

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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2021GE6 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1965-04-13 09:02	> 1 mo	0.0157398	0.0069175	3.1442594
EARTH	1965-08-23 03:46	> 1 mo	0.1579969	0.0386369	2.6919228
EARTH	1982-05-11 05:22	> 1 mo	0.0291442	0.0030571	0.1740945
EARTH	1999-07-27 12:09	> 1 w	0.1532010	0.0145222	0.2825890
EARTH	2010-04-30 21:01	> 1 w	0.0224277	0.0063855	0.0184470
EARTH	2021-04-15 09:44	< 1 min	0.0074504	0.0074017	0.0000162
EARTH	2021-08-11 17:49	500.9	0.1485680	0.1476497	0.0003061
EARTH	2038-04-01 07:40	> 1 d	0.1009008	0.0068787	0.0523836
EARTH	2044-07-24 17:24	> 1 d	0.1166798	0.0251292	0.0307530
EARTH	2061-07-05 17:19	> 1 w	0.0102164	0.0079962	0.0326341
EARTH	2067-07-26 23:27	> 1 mo	0.1533532	0.0071763	0.9142878
EARTH	2090-03-24 21:45	> 1 mo	0.1874943	0.0121895	2.8126046
EARTH	2096-04-09 04:36	> 1 mo	0.0163227	0.0114411	1.7381328
EARTH	2096-08-30 01:04	> 1 mo	0.1608622	0.0235229	1.5842035
EARTH	2102-03-25 20:02	> 1 mo	0.1896404	0.0090253	9.6834239

Download as:

2021GE6

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2056-07-08.578	72187.578	1.674	2.67 ± 0.172	1.01E6	5.01E-7	2.23E-9	-8.17
2076-07-16.019	79500.019	1.681	2.54 ± 0.194	9.89E5	5.02E-7	2.24E-9	-8.38
2086-07-16.199	83152.199	1.353	2.58 ± 1.012	1.18E8	9.08E-9	4.05E-11	-10.20
2091-07-17.938	84979.938	-1.582	1.65 ± 0.196	3.79E6	1.95E-7	8.63E-10	-8.90
2101-07-11.089	88625.089	-1.037	1.77 ± 0.183	4.41E6	3.33E-7	1.48E-9	-8.72
2101-07-11.311	88625.311	1.976	2.86 ± 0.174	3.92E7	6.32E-9	2.82E-11	-10.44
2106-07-09.669	90449.669	2.014	3.42 ± 0.173	8.89E7	1.42E-9	6.33E-12	-11.12
2108-07-09.206	91180.206	1.635	3.02 ± 0.877	6.90E8	6.96E-10	3.10E-12	-11.44
2108-07-18.335	91189.335	-1.008	2.00 ± 0.089	5.65E6	2.68E-7	1.19E-9	-8.85
2110-07-13.923	91914.923	0.961	0.84 ± 0.283	1.36E7	1.30E-7	5.79E-10	-9.18


Based on 17 optical observations (of which 1 are rejected as outliers) from 2021/04/09.247 to 2021/04/11.228.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 3.62 and 3.62 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20240110 090430.825 UTC.

Download this part as:

Download Impactor Table as: