Asteroids

2003LW2 help

Last update: 2026-07-30 11:21 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.977

Aphelion (Q)

2.718

Eccentricity (e)

0.471

Inclination (i)

2.2

deg

Orbit period (P)

917.1

Earth MOID

0.00125

U parameter

1.9

Next Earth close approach

Date

2104-03-16

Nominal distance (from Earth center)

0.19702

29474154

Maximum Brightness

24.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.8

mag

Diameter

19 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2003-06-04

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.847384

1-sigma variation

2.054E-7

Unit

Eccentricity (e)

Value

0.471277

1-sigma variation

1.912E-7

Unit

Inclination (i)

Value

2.2202

1-sigma variation

1.410E-5

Unit

Long. of Ascending Node (Ω)

Value

246.8000

1-sigma variation

2.809E-5

Unit

Arg. of Perihelion (ω)

Value

334.4050

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

10.44043

1-sigma variation

0.00020

Unit

Perihelion distance

Value

0.976754

1-sigma variation

Unit

Aphelion distance

Value

2.718014

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.004610

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.511114

1-sigma variation

Unit

MOID

Value

0.001248

1-sigma variation

Unit

Orbit Period

Value

917.1368

1-sigma variation

Unit

U parameter

Value

1.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.21812E-14	3.55414E-14	2.25716E-13	-4.14659E-12	-1.11531E-11	-4.06913E-11
e	3.55414E-14	3.65679E-14	8.29621E-13	-2.40333E-12	-1.46438E-11	-3.31441E-11
i	2.25716E-13	8.29621E-13	1.98797E-10	2.39533E-10	-7.32064E-10	-1.00329E-10
Ω	-4.14659E-12	-2.40333E-12	2.39533E-10	7.89161E-10	2.35534E-11	4.19537E-9
ω	-1.11531E-11	-1.46438E-11	-7.32064E-10	2.35534E-11	7.32665E-9	9.84454E-9
M	-4.06913E-11	-3.31441E-11	-1.00329E-10	4.19537E-9	9.84454E-9	3.94525E-8

Date of computation: 2026-07-30 11:21 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

25.779

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

19 - 40*

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

6572

Unit

Source

[1]

Unobserved

Value

1959

Unit

Source

[1]

Normalized RMS of residuals

Value

0.553308

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2003-06-04.32665

Unit

Source

[2]

Last Observation

Value

2021-06-01.594894

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

70 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

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Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2003LW2 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1993-03-28 17:16	1.3	0.0646606	0.0646443	0.0000054
EARTH	1998-04-26 04:43	1.8	0.0353448	0.0353432	0.0000005
EARTH	2003-06-01 05:15	< 1 min	0.0033098	0.0033097	0.0000000
EARTH	2021-05-29 06:59	< 1 min	0.0027478	0.0027477	0.0000000
EARTH	2026-06-14 18:18	1.5	0.0789963	0.0789703	0.0000087
EARTH	2104-03-16 06:19	3.8	0.1970225	0.1968930	0.0000432
EARTH	2109-03-29 21:33	7.1	0.0663472	0.0662543	0.0000310
EARTH	2114-04-17 20:48	4.9	0.0294212	0.0294155	0.0000019
EARTH	2119-05-18 23:00	< 1 min	0.0292321	0.0292293	0.0000009
EARTH	2124-05-29 08:56	5.0	0.0098471	0.0098231	0.0000080

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
16.65587753	143.68143978	0.00124757	MINIMUM
348.01225885	95.99747673	0.02832150	MINIMUM
359.55170849	115.18120366	0.03496766	SADDLE
180.54282861	297.45496120	1.72576743	SADDLE
1.56408003	298.57607788	1.96901067	SADDLE
180.60441764	117.49654724	3.72558686	MAXIMUM

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MOID Plots

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