Asteroids

2008GM2 help

Last update: 2025-06-12 07:47 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.887

Aphelion (Q)

1.220

Eccentricity (e)

0.158

Inclination (i)

4.1

deg

Orbit period (P)

394.9

Earth MOID

0.00204

U parameter

6.1

Next Earth close approach

Date

2033-10-18

Nominal distance (from Earth center)

0.1362

20374538

Maximum Brightness

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

28.4

mag

Diameter

6 - 13*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2008-04-06

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

1.053362

1-sigma variation

0.000034

Unit

Eccentricity (e)

Value

0.157871

1-sigma variation

0.000014

Unit

Inclination (i)

Value

4.0771

1-sigma variation

0.0043

Unit

Long. of Ascending Node (Ω)

Value

194.7843

1-sigma variation

0.0145

Unit

Arg. of Perihelion (ω)

Value

278.0695

1-sigma variation

0.0018

Unit

Mean Anomaly (M)

Value

1.52275

1-sigma variation

0.11809

Unit

Perihelion distance

Value

0.887066

1-sigma variation

Unit

Aphelion distance

Value

1.219657

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.004415

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.051398

1-sigma variation

Unit

MOID

Value

0.002038

1-sigma variation

Unit

Orbit Period

Value

394.8795

1-sigma variation

Unit

U parameter

Value

6.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.18195E-9	-4.89698E-10	-1.47879E-7	-4.98973E-7	6.20927E-8	4.05984E-6
e	-4.89698E-10	2.05491E-10	6.13144E-8	2.06813E-7	-2.61736E-8	-1.68122E-6
i	-1.47879E-7	6.13144E-8	1.85026E-5	6.24299E-5	-7.77675E-6	-5.07928E-4
Ω	-4.98973E-7	2.06813E-7	6.24299E-5	2.10650E-4	-2.62270E-5	-1.71388E-3
ω	6.20927E-8	-2.61736E-8	-7.77675E-6	-2.62270E-5	3.33919E-6	2.13137E-4
M	4.05984E-6	-1.68122E-6	-5.07928E-4	-1.71388E-3	2.13137E-4	1.39453E-2

Date of computation: 2025-06-12 07:47 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

28.375

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

6 - 13*

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

[-]

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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

6288

Unit

Source

[1]

Normalized RMS of residuals

Value

0.469424

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2008-04-06.41278

Unit

Source

[2]

Last Observation

Value

2008-04-14.25814

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

54 (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 2008GM2 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	1974-10-03 11:17	111.3	0.0331020	0.0263270	0.0022655
EARTH	1975-08-24 19:04	> 1 d	0.1368008	0.1348092	0.0006645
EARTH	1975-12-02 19:13	> 1 d	0.1220385	0.1205214	0.0005060
EARTH	1976-07-05 00:35	607.5	0.1782633	0.1780681	0.0000651
EARTH	1977-02-05 11:23	59.7	0.1228861	0.1224872	0.0001330
EARTH	1977-05-16 21:41	311.4	0.1356646	0.1353950	0.0000900
EARTH	1978-04-07 10:58	41.2	0.0324723	0.0289021	0.0011901
EARTH	2004-09-27 04:16	18.8	0.1728125	0.1702814	0.0008437
EARTH	2005-10-09 00:09	77.7	0.0381373	0.0357053	0.0008108
EARTH	2006-07-26 23:43	620.6	0.1739158	0.1739012	0.0000049
EARTH	2007-01-10 15:11	497.8	0.1337693	0.1336304	0.0000463
EARTH	2007-06-04 14:48	333.9	0.1639586	0.1634127	0.0001820
EARTH	2008-04-03 21:45	< 1 min	0.0013893	0.0013877	0.0000005
EARTH	2020-10-25 23:43	145.0	0.0451185	0.0366803	0.0029159
EARTH	2022-04-14 01:56	176.8	0.1781499	0.1694805	0.0028898
EARTH	2033-10-18 14:50	30.6	0.1361954	0.1344819	0.0005712
EARTH	2035-04-04 00:41	101.4	0.0043042	0.0019316	0.0009550
EARTH	2044-09-07 23:06	> 1 mo	0.1932879	0.1105905	0.1040421
EARTH	2045-03-19 06:00	> 1 mo	0.0624135	0.0083736	0.2448284
EARTH	2054-10-17 05:51	> 1 mo	0.1151045	0.0603971	0.0705715
EARTH	2054-12-28 10:14	> 1 mo	0.1040451	0.0401917	0.0246290
EARTH	2055-05-25 17:23	> 1 mo	0.1833932	0.0644254	0.0428868
EARTH	2064-11-03 08:29	> 1 d	0.0377861	0.0367979	0.0318326
EARTH	2076-04-11 21:41	> 1 mo	0.1254722	0.0025187	0.9401223
EARTH	2085-09-04 15:39	> 1 mo	0.1975477	0.1212608	0.3573507
EARTH	2086-03-23 04:47	> 1 mo	0.0544895	0.0051395	0.9152343
EARTH	2095-11-03 13:59	> 1 mo	0.0367112	0.0364164	0.1445260
EARTH	2107-03-31 23:50	> 1 mo	0.0275311	0.0008975	9.0707317
EARTH	2118-04-07 04:04	> 1 mo	0.0305368	0.0006576	75.5644411

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
71.63493930	90.16545805	0.00203828	MINIMUM
287.23603036	289.80498434	0.02225585	MINIMUM
358.87955111	9.15520611	0.11707956	SADDLE
179.66838783	190.49652017	0.21818357	SADDLE
1.22327080	191.85452923	1.90188863	SADDLE
181.08659089	11.72015688	2.20225815	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2008GM2

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2085-04-03.001	82683.001	1.684	1.28 ± 0.063	1.09E7	4.21E-8	3.77E-10	-9.27
2090-04-03.143	84509.143	-1.312	0.74 ± 0.004	9.84E6	8.61E-8	7.70E-10	-8.99
2091-04-03.638	84874.638	1.802	1.80 ± 0.008	4.91E5	7.29E-7	6.52E-9	-8.07
2093-04-03.013	85605.013	0.890	1.52 ± 0.000	2.87E6	4.07E-7	3.64E-9	-8.34
2093-04-03.268	85605.268	1.426	2.45 ± 0.003	2.99E4	8.89E-6	7.95E-8	-7.00
2093-04-03.406	85605.406	4.853	0.75 ± 0.031	2.71E4	5.70E-10	5.10E-12	-11.19
2099-04-03.347	87796.347	-2.306	2.15 ± 0.015	1.88E5	5.61E-7	5.01E-9	-8.23
2099-04-03.365	87796.365	-1.368	2.02 ± 0.003	2.03E5	2.61E-6	2.33E-8	-7.57
2101-04-03.899	88526.899	1.719	1.84 ± 0.127	2.21E7	1.54E-8	1.37E-10	-9.81
2101-04-04.177	88527.177	-0.490	2.49 ± 0.022	1.33E6	4.45E-7	3.97E-9	-8.35
2103-04-04.200	89257.200	-4.448	2.37 ± 0.010	3.54E6	1.32E-11	1.17E-13	-12.89
2105-04-03.750	89987.750	0.866	0.93 ± 0.000	1.18E7	1.14E-7	1.02E-9	-8.96
2105-04-03.821	89987.821	0.842	2.10 ± 0.000	4.02E6	2.20E-7	1.97E-9	-8.67
2105-04-03.854	89987.854	-3.957	2.25 ± 0.003	1.38E6	3.14E-10	2.80E-12	-11.52
2105-04-03.919	89987.919	2.235	0.29 ± 0.032	5.80E6	2.95E-8	2.63E-10	-9.55
2105-04-03.952	89987.952	1.662	2.23 ± 0.004	1.54E6	1.93E-7	1.72E-9	-8.73
2105-04-03.982	89987.982	2.230	2.19 ± 0.004	5.68E5	1.71E-7	1.52E-9	-8.78
2107-04-04.372	90718.372	-4.148	0.83 ± 0.001	1.56E6	2.34E-10	2.09E-12	-11.66
2107-04-04.385	90718.385	-0.379	2.26 ± 0.003	3.83E5	2.67E-6	2.39E-8	-7.60
2107-04-04.525	90718.525	3.016	1.19 ± 0.002	1.15E5	1.71E-7	1.53E-9	-8.79
2108-04-03.723	91083.723	-1.538	1.68 ± 0.002	1.34E6	3.67E-7	3.28E-9	-8.47
2108-04-03.730	91083.730	1.694	1.55 ± 0.045	7.52E6	6.07E-8	5.42E-10	-9.25
2108-04-03.774	91083.774	-0.467	0.25 ± 0.200	2.04E7	9.12E-8	8.15E-10	-9.07
2108-04-03.797	91083.797	-0.460	1.30 ± 0.059	7.49E5	2.19E-6	1.96E-8	-7.69
2109-04-03.941	91448.941	-0.477	0.18 ± 0.000	6.78E7	2.74E-8	2.45E-10	-9.60
2109-04-04.019	91449.019	-0.481	2.38 ± 0.019	1.03E6	1.34E-6	1.20E-8	-7.91
2109-04-04.082	91449.082	-0.657	2.07 ± 0.000	2.07E7	5.54E-8	4.94E-10	-9.29
2110-04-04.141	91814.141	-0.443	2.19 ± 0.006	4.39E6	2.39E-7	2.13E-9	-8.66
2111-04-04.295	92179.295	1.773	1.10 ± 0.008	1.21E7	3.27E-8	2.91E-10	-9.53
2112-04-03.630	92544.630	-1.918	0.17 ± 0.056	6.93E5	4.78E-7	4.27E-9	-8.37
2112-04-03.638	92544.638	-1.802	0.82 ± 0.350	9.68E5	4.00E-7	3.57E-9	-8.45
2112-04-03.716	92544.716	-0.432	1.95 ± 0.000	2.86E7	4.55E-8	4.07E-10	-9.39
2114-04-04.081	93275.081	-1.683	1.49 ± 0.101	3.04E6	1.41E-7	1.26E-9	-8.91
2116-04-03.622	94005.622	-0.460	1.76 ± 0.059	1.42E7	9.99E-8	8.91E-10	-9.07
2116-04-03.759	94005.759	4.458	1.10 ± 0.014	9.27E5	9.96E-11	8.89E-13	-12.07
2116-04-03.902	94005.902	-0.470	2.45 ± 0.045	2.92E6	4.19E-7	3.75E-9	-8.45
2117-04-03.791	94370.791	0.003	1.29 ± 0.004	1.30E6	1.40E-6	1.25E-8	-7.93
2117-04-03.807	94370.807	-0.108	1.14 ± 0.004	7.08E5	2.63E-6	2.35E-8	-7.65
2119-04-04.385	95101.385	1.876	2.13 ± 0.009	2.83E5	1.16E-6	1.04E-8	-8.02
2119-04-04.389	95101.389	2.018	0.45 ± 0.004	1.40E5	1.91E-6	1.71E-8	-7.80
2120-04-03.194	95466.194	-1.378	0.89 ± 0.009	5.42E5	1.40E-6	1.25E-8	-7.94


Based on 54 optical observations (of which 0 are rejected as outliers) from 2008/04/06.413 to 2008/04/14.258.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.62 and 2.62 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250305 090902.140 UTC.

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