Asteroids

2021GJ3

Last update: 2021-04-13 13:23 UTC

Orbital Properties

Epoch

59400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.815

Aphelion (Q)

2.653

Eccentricity (e)

0.53

Inclination (i)

1.5

deg

Orbit period (P)

834.2

days

Earth MOID

0.00935

Next Earth close approach

Date

2021-04-21

Nominal distance (from Earth center)

0.00987

1476202

Maximum Brightness

16.3

Orbit Visualiser

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Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

23.8

Diameter

60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-04

Observatory

Mt. Lemmon Survey

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period

Value

1-sigma variation

Unit

Epoch

Value

59400.0

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.73

1-sigma variation

0.00212703

Unit

Eccentricity (e)

Value

0.530077301046465

1-sigma variation

6.74933E-4

Unit

Inclination (i)

Value

1.54

1-sigma variation

2.012E-3

Unit

Ascending Node (Ω)

Value

10.52

1-sigma variation

3.608E-3

Unit

Arg. of Perihelion (ω)

Value

263.15

1-sigma variation

1.534E-3

Unit

Mean Anomaly (M)

Value

13.33

1-sigma variation

1.790E-2

Unit

Perihelion

Value

8.149E-1

1-sigma variation

Unit

Aphelion

Value

2.65

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

3.286E-1

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.746E-1

1-sigma variation

Unit

MOID

Value

9.350E-3

1-sigma variation

Unit

Orbit Period

Value

834.16

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.52425E-6	1.43560E-6	4.27644E-6	7.66087E-6	-3.17855E-6	-3.80712E-5
e	1.43560E-6	4.55534E-7	1.35686E-6	2.43063E-6	-1.00805E-6	-1.20803E-5
i	4.27644E-6	1.35686E-6	4.04689E-6	7.25459E-6	-3.02656E-6	-3.59903E-5
Ω	7.66087E-6	2.43063E-6	7.25459E-6	1.30191E-5	-5.44924E-6	-6.44760E-5
ω	-3.17855E-6	-1.00805E-6	-3.02656E-6	-5.44924E-6	2.35279E-6	2.67658E-5
M	-3.80712E-5	-1.20803E-5	-3.59903E-5	-6.44760E-5	2.67658E-5	3.20372E-4

Date of computation: 2021-04-13 11:12 UTC

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)

Taxononomy

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

23.774

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

60*

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

[-]

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

**Estimated value

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

days

Source

[1]

Unobserved

Value

Unit

days

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.54937

Unit

arcseconds

Source

[1]

First Observation

Value

2021-03-23.38004

Unit

Source

[2]

Last Observation

Value

2021-04-13.230836

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

59 (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 2021GJ3 from 1950 to 2150

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
EARTH	1964-05-17.07270	38532.1	0.1496133	0.0086519	1.706E-1	8.837E-7	3.91E-1
EARTH	1973-09-11.02058	41936.0	0.1626220	0.0162365	3.812E-1	8.651E-7	1.74E-1
EARTH	1980-04-12.72908	44341.7	0.0965450	0.0088227	3.854E-1	3.905E-7	1.73E-1
EARTH	1989-08-11.20820	47749.2	0.1286099	0.0159818	1.853E-1	1.107E-6	3.59E-1
EARTH	2005-06-07.24183	53528.2	0.1908278	0.0091659	4.391E-2	1.231E-6	5.35E-1
EARTH	2021-04-21.10172	59325.1	0.0098678	0.0098345	1.110E-5	1.028E-7	1.00E0
EARTH	2030-09-07.19791	62751.2	0.0890967	0.0146479	1.200E-1	8.997E-7	5.54E-1
EARTH	2037-04-14.30299	65162.3	0.0832839	0.0093980	1.762E-1	4.094E-7	3.78E-1
EARTH	2046-08-27.95591	68585.0	0.0387248	0.0145098	1.122E-1	9.844E-7	5.93E-1
EARTH	2078-05-07.33946	80160.3	0.1121604	0.0100101	5.273E-1	7.156E-7	1.26E-1
EARTH	2087-09-11.00195	83574.0	0.1347368	0.0139927	6.096E-1	8.641E-7	1.09E-1
EARTH	2094-04-14.02267	85981.0	0.1031676	0.0101896	4.202E-1	4.370E-7	1.58E-1
EARTH	2103-08-18.56902	89393.6	0.1093257	0.0391683	1.600E-2	1.024E-6	1.00E0
EARTH	2135-05-01.19897	100972.2	0.0687458	0.0106928	1.056E0	6.136E-7	6.30E-2
EARTH	2144-09-10.66947	104392.7	0.1125616	0.0132299	5.378E-1	8.384E-7	1.24E-1

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