Asteroids

2002GG8 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.988

Aphelion (Q)

3.619

Eccentricity (e)

0.571

Inclination (i)

12.5

deg

Orbit period (P)

1277.0

Earth MOID

0.03368

U parameter

9.0

Next Earth close approach

Date

2030-04-03

Nominal distance (from Earth center)

0.03966

5932615

Maximum Brightness

19.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.9

mag

Diameter

28 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2002-04-11

Observatory

Lincoln Laboratory ETS, New Mexico

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.303520

1-sigma variation

0.127235

Unit

Eccentricity (e)

Value

0.570891

1-sigma variation

0.024151

Unit

Inclination (i)

Value

12.5408

1-sigma variation

0.3962

Unit

Long. of Ascending Node (Ω)

Value

201.1205

1-sigma variation

0.3162

Unit

Arg. of Perihelion (ω)

Value

327.8460

1-sigma variation

0.3001

Unit

Mean Anomaly (M)

Value

276.53788

1-sigma variation

42.82990

Unit

Perihelion distance

Value

0.988462

1-sigma variation

Unit

Aphelion distance

Value

3.618577

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.043327

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

2.007487

1-sigma variation

Unit

MOID

Value

0.033682

1-sigma variation

Unit

Orbit Period

Value

1276.9865

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.61888E-2	3.07290E-3	-5.04099E-2	4.02278E-2	3.81895E-2	-5.44947E0
e	3.07290E-3	5.83287E-4	-9.56864E-3	7.63590E-3	7.24900E-3	-1.03440E0
i	-5.04099E-2	-9.56864E-3	1.56970E-1	-1.25264E-1	-1.18917E-1	1.69690E1
Ω	4.02278E-2	7.63590E-3	-1.25264E-1	9.99628E-2	9.48977E-2	-1.35415E1
ω	3.81895E-2	7.24900E-3	-1.18917E-1	9.48977E-2	9.00894E-2	-1.28554E1
M	-5.44947E0	-1.03440E0	1.69690E1	-1.35415E1	-1.28554E1	1.83440E3

Date of computation: 2025-09-10 00:30 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

24.851

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

28 - 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

[-]

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

8547

Unit

Source

[1]

Normalized RMS of residuals

Value

0.727262

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2002-04-11.31735

Unit

Source

[2]

Last Observation

Value

2002-05-02.59656

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

25 (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

Close Approaches for 2002GG8 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	1995-04-22 10:20	> 1 w	0.1593385	0.0152914	0.1860032
EARTH	2002-04-07 07:16	< 1 min	0.0336243	0.0334446	0.0000599
EARTH	2009-03-25 22:54	> 1 mo	0.0761196	0.0193865	0.1455073
EARTH	2016-04-03 09:04	> 1 mo	0.0435540	0.0421853	0.0712257
EARTH	2023-04-07 15:17	> 1 mo	0.0374746	0.0356145	0.3256793
EARTH	2030-04-03 10:36	> 1 mo	0.0396571	0.0344579	2.0250285
EARTH	2037-03-23 23:13	> 1 mo	0.0847742	0.0216672	12.2123053
EARTH	2044-03-18 09:20	> 1 mo	0.1074882	0.0028713	18.3911601
EARTH	2051-03-11 13:55	> 1 mo	0.1348778	0.0364439	22.3462627

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
14.19304834	92.74297248	0.03482391	MINIMUM
0.36893112	247.16376510	1.99160141	SADDLE
179.65926515	247.41496263	2.62160598	SADDLE
180.71528939	67.95902687	4.60687378	MAXIMUM

Download:

MOID Plots

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