Asteroids

2004RW2 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.990

Aphelion (Q)

1.861

Eccentricity (e)

0.306

Inclination (i)

8.3

deg

Orbit period (P)

621.5

Earth MOID

0.03804

U parameter

9.0

Next Earth close approach

Date

2038-10-17

Nominal distance (from Earth center)

0.12814

19168924

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.3

mag

Diameter

40 - 80*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2004-09-06

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.425294

1-sigma variation

0.005184

Unit

Eccentricity (e)

Value

0.305658

1-sigma variation

0.001754

Unit

Inclination (i)

Value

8.3256

1-sigma variation

0.0679

Unit

Long. of Ascending Node (Ω)

Value

334.0739

1-sigma variation

0.0196

Unit

Arg. of Perihelion (ω)

Value

46.2506

1-sigma variation

0.4323

Unit

Mean Anomaly (M)

Value

149.86415

1-sigma variation

10.83370

Unit

Perihelion distance

Value

0.989641

1-sigma variation

Unit

Aphelion distance

Value

1.860947

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.055519

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.648302

1-sigma variation

Unit

MOID

Value

0.038038

1-sigma variation

Unit

Orbit Period

Value

621.5199

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.68746E-5	9.09449E-6	3.51766E-4	1.01513E-4	-2.24111E-3	-5.61628E-2
e	9.09449E-6	3.07762E-6	1.19039E-4	3.43525E-5	-7.58402E-4	-1.90058E-2
i	3.51766E-4	1.19039E-4	4.60432E-3	1.32875E-3	-2.93343E-2	-7.35123E-1
Ω	1.01513E-4	3.43525E-5	1.32875E-3	3.83512E-4	-8.46551E-3	-2.12144E-1
ω	-2.24111E-3	-7.58402E-4	-2.93343E-2	-8.46551E-3	1.86890E-1	4.68349E0
M	-5.61628E-2	-1.90058E-2	-7.35123E-1	-2.12144E-1	4.68349E0	1.17370E2

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

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

24.343

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 - 80*

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

[-]

Download this part as:

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

7670

Unit

Source

[1]

Normalized RMS of residuals

Value

0.619871

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-09-06.23532

Unit

Source

[2]

Last Observation

Value

2004-09-17.2009

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

64 (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 2004RW2 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	1958-11-04 19:27	> 1 w	0.1593960	0.1203230	0.0773629
EARTH	1987-08-28 00:47	> 1 w	0.1083167	0.0296957	0.1720545
EARTH	2004-09-06 10:55	< 1 min	0.0380344	0.0377645	0.0000900
EARTH	2021-09-11 05:19	> 1 mo	0.0475189	0.0364272	0.1038365
EARTH	2038-10-17 02:41	> 1 mo	0.1281363	0.0748601	0.4440974
EARTH	2067-08-25 07:15	> 1 mo	0.1501485	0.0267675	1.0932479
EARTH	2084-09-07 14:26	> 1 mo	0.0398151	0.0394945	0.0535680
EARTH	2101-10-07 21:51	> 1 mo	0.1127736	0.0373419	1.9015847

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
333.41649728	242.90928101	0.03890808	MINIMUM
180.65154209	97.77686349	0.87085151	SADDLE
358.01460845	96.02789411	1.98897265	SADDLE
177.78699152	275.68689463	2.85543576	MAXIMUM

Download:

MOID Plots

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