Asteroids

2001GO2 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.837

Aphelion (Q)

1.176

Eccentricity (e)

0.168

Inclination (i)

4.6

deg

Orbit period (P)

368.9

Earth MOID

0.00418

U parameter

6.2

Next Earth close approach

Date

2092-09-17

Nominal distance (from Earth center)

0.18243

27291535

Maximum Brightness

23.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.1

mag

Diameter

40 - 90*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2001-04-13

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.006641

1-sigma variation

0.000025

Unit

Eccentricity (e)

Value

0.168275

1-sigma variation

0.000504

Unit

Inclination (i)

Value

4.6225

1-sigma variation

0.0160

Unit

Long. of Ascending Node (Ω)

Value

193.5040

1-sigma variation

0.0017

Unit

Arg. of Perihelion (ω)

Value

265.5507

1-sigma variation

0.0231

Unit

Mean Anomaly (M)

Value

23.30621

1-sigma variation

0.53243

Unit

Perihelion distance

Value

0.837248

1-sigma variation

Unit

Aphelion distance

Value

1.176034

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.008990

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.033815

1-sigma variation

Unit

MOID

Value

0.004181

1-sigma variation

Unit

Orbit Period

Value

368.9014

1-sigma variation

Unit

U parameter

Value

6.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.50245E-10	1.25533E-8	3.98266E-7	3.59542E-8	-5.56339E-7	-1.35718E-5
e	1.25533E-8	2.54096E-7	8.06325E-6	7.98006E-7	-1.15632E-5	-2.63596E-4
i	3.98266E-7	8.06325E-6	2.55885E-4	2.53598E-5	-3.67008E-4	-8.36311E-3
Ω	3.59542E-8	7.98006E-7	2.53598E-5	2.99196E-6	-3.81055E-5	-7.64473E-4
ω	-5.56339E-7	-1.15632E-5	-3.67008E-4	-3.81055E-5	5.33683E-4	1.17229E-2
M	-1.35718E-5	-2.63596E-4	-8.36311E-3	-7.64473E-4	1.17229E-2	2.83483E-1

Date of computation: 2025-07-29 02:36 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

24.128

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

40 - 90*

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

8883

Unit

Source

[1]

Normalized RMS of residuals

Value

0.605804

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2001-04-13.20079

Unit

Source

[2]

Last Observation

Value

2001-04-17.85509

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

24 (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

[-]

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 2001GO2 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	1997-04-13 03:34	57.9	0.1599923	0.1567807	0.0010706
EARTH	1998-04-11 01:42	75.6	0.1081275	0.1041717	0.0013187
EARTH	1999-04-09 05:51	87.4	0.0618015	0.0573067	0.0014987
EARTH	2000-04-06 23:15	80.9	0.0257846	0.0215767	0.0014070
EARTH	2001-04-06 18:24	< 1 min	0.0160980	0.0159343	0.0000546
EARTH	2002-04-08 07:50	76.0	0.0481701	0.0444027	0.0012561
EARTH	2003-04-10 15:25	116.2	0.0946037	0.0885541	0.0020166
EARTH	2004-04-12 06:25	135.3	0.1469976	0.1392380	0.0025866
EARTH	2092-09-17 02:29	1426.8	0.1824326	0.0971684	0.0285550
EARTH	2093-09-20 03:29	> 1 d	0.1276316	0.0464562	0.0275347
EARTH	2094-09-22 20:30	> 1 d	0.0775831	0.0166173	0.0249832
EARTH	2095-09-25 09:27	> 1 d	0.0365832	0.0159575	0.0183248
EARTH	2096-09-26 00:07	462.7	0.0174062	0.0157566	0.0029255
EARTH	2097-09-26 07:30	7.1	0.0163570	0.0160467	0.0003081
EARTH	2098-09-25 16:18	156.1	0.0242787	0.0228261	0.0004934
EARTH	2099-09-23 22:38	265.2	0.0574024	0.0516168	0.0019357
EARTH	2100-09-21 18:28	314.7	0.1037588	0.0944789	0.0030968
EARTH	2101-09-19 11:14	333.4	0.1559745	0.1438317	0.0040498

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
87.37353323	92.96368053	0.00418146	MINIMUM
274.01450886	262.07822082	0.01601470	MINIMUM
0.67703080	357.65575842	0.16357615	SADDLE
180.70427665	177.36453327	0.18231311	SADDLE
359.69383964	176.51114306	1.85204748	SADDLE
179.63253495	356.44607834	2.15797572	MAXIMUM

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MOID Plots

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