Asteroids

387733 2003GS help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.698

Aphelion (Q)

1.088

Eccentricity (e)

0.219

Inclination (i)

12.0

deg

Orbit period (P)

308.1

Earth MOID

0.08569

U parameter

0.0

Next Earth close approach

Date

2030-03-18

Nominal distance (from Earth center)

0.10844

16222734

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.9

mag

Diameter

481

Taxonomic type

Rotation period (T)

2.469

Discovery Information

Discovery Date

2003-04-04

Observatory

Lowell Observatory-LONEOS

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

0.892803

1-sigma variation

6.961E-10

Unit

Eccentricity (e)

Value

0.218622

1-sigma variation

1.073E-8

Unit

Inclination (i)

Value

12.0292

1-sigma variation

4.950E-6

Unit

Long. of Ascending Node (Ω)

Value

196.1781

1-sigma variation

6.979E-6

Unit

Arg. of Perihelion (ω)

Value

181.9039

1-sigma variation

1.374E-5

Unit

Mean Anomaly (M)

Value

101.61530

1-sigma variation

0.00002

Unit

Perihelion distance

Value

0.697617

1-sigma variation

Unit

Aphelion distance

Value

1.087990

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.085797

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.301401

1-sigma variation

Unit

MOID

Value

0.085687

1-sigma variation

Unit

Orbit Period

Value

308.1287

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.84587E-19	2.39829E-18	-1.52235E-16	-1.32866E-15	-5.73310E-15	6.90291E-15
e	2.39829E-18	1.15069E-16	2.28588E-14	4.67920E-14	-1.29480E-13	1.16625E-13
i	-1.52235E-16	2.28588E-14	2.45027E-11	2.61286E-11	-3.17940E-11	1.73670E-11
Ω	-1.32866E-15	4.67920E-14	2.61286E-11	4.87046E-11	-3.67063E-11	-4.87844E-12
ω	-5.73310E-15	-1.29480E-13	-3.17940E-11	-3.67063E-11	1.88843E-10	-2.01412E-10
M	6.90291E-15	1.16625E-13	1.73670E-11	-4.87844E-12	-2.01412E-10	2.85956E-10

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

2.469

Unit

Source

[2]

Quality

Value

Unit

Source

[2]

Amplitude

Value

0.2

Unit

mag

Source

[2]

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

[1]

Taxonomy (all)

Value

Unit

Source

[1]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.893

18.97

Unit

mag

Source

[3]

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.284

0.411

Unit

Source

[5]

[4]

Diameter

Value

481

Unit

Source

[4]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.47

0.77

0.36

Unit

V-R

B-V

R-I

Source

[1]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[6]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Hicks, M. et al. (2014) href="http://www.astronomerstelegram.org/?read=6090"> ATel#6090 (Broad-band photometry of NHATS target (387733) 2003 GS)
[2]	EARN	1.) Hicks, M. et al. (2014) href="http://www.astronomerstelegram.org/?read=6090"> ATel#6090 (Broad-band photometry of NHATS target (387733) 2003 GS) 2.) Benishek, V. (2014) MPB 41, 257-260. (ROTATION PERIODS AND LIGHTCURVES FOR SIX NEAR-EARTH ASTEROIDS) (154275,275677, 387733,2011JR13,2013SU24,2013WT44) 3.) Warner, B.D. (2014) MPB 41, 213-224. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2014 MARCH-JUNE) (38 NEA lightcurve data) 4.) Elenin, L. et al. (2015) MPB 42, 27. (FIRST PHOTOMETRIC OBSERVATIONS OF NEAR-EARTH ASTEROIDS AT TIEN-SHAN ASTRONOMICAL OBSERVATORY) (387733)
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	EARN	1.) Mainzer, A. et al. (2014) Astrophys. J. 792, 30. (Initial Performance of the NEOWISE Reactivation Mission) (prel.diameters & albedos for 61 NEOs)
[5]	EARN	1.) Nugent, C.R. et al. (2015) Astrophys. J. 814_117 (13pp) (NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos)(201 NEOs)
[6]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

8101

Unit

Source

[1]

Unobserved

Value

153

Unit

Source

[1]

Normalized RMS of residuals

Value

0.401241

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2003-04-04.13966

Unit

Source

[2]

Last Observation

Value

2025-06-08.19032

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

931 (2)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2014-04-17

Unit

Source

[3]

Last Observation

Value

2014-04-18

Unit

Source

[3]

Delay (Discarded)

Value

5 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

5 (0)

Unit

Source

[1]

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
[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 387733 2003GS 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	1955-05-07 05:31	< 1 min	0.1595670	0.1595604	0.0000022
EARTH	1960-03-20 03:33	< 1 min	0.1040396	0.1040371	0.0000008
EARTH	1971-04-22 17:21	< 1 min	0.0987086	0.0987074	0.0000004
EARTH	1976-03-04 00:06	< 1 min	0.1684326	0.1684313	0.0000004
VENUS	1977-08-05 03:13	< 1 min	0.0247052	0.0247049	0.0000001
EARTH	1987-04-02 12:40	< 1 min	0.0878911	0.0878910	0.0000000
EARTH	1998-05-04 01:56	< 1 min	0.1382038	0.1382036	0.0000001
VENUS	2000-05-12 16:30	< 1 min	0.0289763	0.0289760	0.0000001
EARTH	2003-03-14 14:55	< 1 min	0.1186074	0.1186072	0.0000001
EARTH	2014-04-12 01:01	< 1 s	0.0874677	0.0874676	0.0000000
EARTH	2025-05-06 17:34	< 1 s	0.1589768	0.1589766	0.0000001
VENUS	2029-11-19 16:21	< 1 min	0.0247367	0.0247366	0.0000000
EARTH	2030-03-18 08:22	< 1 min	0.1084423	0.1084421	0.0000001
EARTH	2041-04-17 15:23	< 1 min	0.0922966	0.0922963	0.0000001
EARTH	2046-03-02 19:50	< 1 min	0.1841329	0.1841313	0.0000005
EARTH	2052-05-08 21:00	< 1 min	0.1952996	0.1952974	0.0000007
EARTH	2057-03-25 08:53	< 1 min	0.0959451	0.0959447	0.0000001
VENUS	2059-05-26 17:53	< 1 min	0.0482369	0.0482345	0.0000008
EARTH	2068-04-25 15:35	< 1 min	0.1075139	0.1075136	0.0000001
EARTH	2073-03-07 15:53	< 1 min	0.1430103	0.1430099	0.0000001
VENUS	2082-03-05 16:03	< 1 min	0.0249641	0.0249636	0.0000002
EARTH	2084-04-07 12:45	< 1 min	0.0864330	0.0864328	0.0000001
EARTH	2095-05-07 13:43	< 1 min	0.1660943	0.1660851	0.0000031
EARTH	2100-03-24 06:46	1.4	0.0977137	0.0977098	0.0000013
VENUS	2104-12-09 04:15	1.4	0.0254340	0.0254277	0.0000021
EARTH	2111-04-29 22:11	3.4	0.1153973	0.1153720	0.0000084
EARTH	2116-03-13 00:45	5.3	0.1232604	0.1232203	0.0000134

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
179.47282828	94.51514315	0.08697582	MINIMUM
340.44681724	253.25631342	0.30329951	SADDLE
353.41911369	89.09063106	1.69827009	SADDLE
176.34399467	272.06316549	2.08679347	MAXIMUM

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MOID Plots

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