Asteroids

2002GG8

Last update: 2023-03-30 23:53 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.990

Aphelion (Q)

3.616

Eccentricity (e)

0.570

Inclination (i)

12.5

deg

Orbit period (P)

1276.5

Earth MOID

0.03587

U parameter

9.0

Next Earth close approach

Date

2023-04-07

Nominal distance (from Earth center)

0.03747

5606116

Maximum Brightness

118.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

24.4

mag

Diameter

50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2002-04-11

Observatory

Lincoln Laboratory ETS, New Mexico

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)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.302881

1-sigma variation

0.027814

Unit

Eccentricity (e)

Value

0.570302

1-sigma variation

0.005475

Unit

Inclination (i)

Value

12.5285

1-sigma variation

0.0203

Unit

Ascending Node (Ω)

Value

201.1498

1-sigma variation

0.0168

Unit

Arg. of Perihelion (ω)

Value

327.8010

1-sigma variation

0.3344

Unit

Mean Anomaly (M)

Value

354.63221

1-sigma variation

19.63080

Unit

Perihelion

Value

0.989542

1-sigma variation

Unit

Aphelion

Value

3.616220

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.046134

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

2.004791

1-sigma variation

Unit

MOID

Value

0.035874

1-sigma variation

Unit

Orbit Period

Value

1276.4556

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.73623E-4	1.52273E-4	5.63499E-4	4.66357E-4	9.30071E-3	-5.46014E-1
e	1.52273E-4	2.99722E-5	1.10914E-4	9.17937E-5	1.83067E-3	-1.07473E-1
i	5.63499E-4	1.10914E-4	4.10449E-4	3.39690E-4	6.77454E-3	-3.97711E-1
Ω	4.66357E-4	9.17937E-5	3.39690E-4	2.81130E-4	5.60667E-3	-3.29149E-1
ω	9.30071E-3	1.83067E-3	6.77454E-3	5.60667E-3	1.11816E-1	-6.56433E0
M	-5.46014E-1	-1.07473E-1	-3.97711E-1	-3.29149E-1	-6.56433E0	3.85370E2

Date of computation: 2022-11-23 04:56 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

24.43

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

50*

Unit

Source

[3]

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]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[3]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

7637

Unit

Source

[1]

Astrometry Summary

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

Optical

Value

Unit

Source

RMS of Residuals

Value

0.727262

Unit

arcsec

Source

[1]

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

[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 2002GG8 from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1995-04-22 10:20	> 1 w	0.1593385	0.0152914	0.1860037
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	0.1455077
EARTH	2016-04-03 09:04	> 1 mo	0.0435540	0.0421853	0.0712258
EARTH	2023-04-07 15:17	> 1 mo	0.0374746	0.0356145	0.3256800
EARTH	2030-04-03 10:36	> 1 mo	0.0396571	0.0344579	2.0250337
EARTH	2037-03-23 23:13	> 1 mo	0.0847742	0.0216671	12.2123339
EARTH	2044-03-18 09:20	> 1 mo	0.1074882	0.0028713	18.3912024
EARTH	2051-03-11 13:55	> 1 mo	0.1348779	0.0364440	22.3463142

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