Asteroids

476904 2008WK32 help

Last update: 2025-11-24 19:20 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.867

Aphelion (Q)

1.924

Eccentricity (e)

0.379

Inclination (i)

15.5

deg

Orbit period (P)

602.3

Earth MOID

0.07031

U parameter

0.0

Next Earth close approach

Date

2047-05-25

Nominal distance (from Earth center)

0.07778

11635050

Maximum Brightness

21.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.2

mag

Diameter

400 - 900*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2008-11-21

Observatory

LPL/Spacewatch II

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

1.395815

1-sigma variation

1.866E-9

Unit

Eccentricity (e)

Value

0.378635

1-sigma variation

3.786E-8

Unit

Inclination (i)

Value

15.4557

1-sigma variation

4.628E-6

Unit

Long. of Ascending Node (Ω)

Value

58.7438

1-sigma variation

9.711E-6

Unit

Arg. of Perihelion (ω)

Value

139.9363

1-sigma variation

9.500E-6

Unit

Mean Anomaly (M)

Value

6.62219

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.867311

1-sigma variation

Unit

Aphelion distance

Value

1.924319

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.695708

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.086433

1-sigma variation

Unit

MOID

Value

0.070313

1-sigma variation

Unit

Orbit Period

Value

602.3378

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.48130E-18	-3.34092E-17	-5.24049E-16	-2.78927E-15	5.40681E-15	-1.01816E-14
e	-3.34092E-17	1.43304E-15	1.05256E-15	8.99649E-14	-4.52448E-14	7.54853E-14
i	-5.24049E-16	1.05256E-15	2.14147E-11	1.11630E-11	-8.81153E-12	1.18858E-12
Ω	-2.78927E-15	8.99649E-14	1.11630E-11	9.43011E-11	-8.00228E-11	-6.30425E-13
ω	5.40681E-15	-4.52448E-14	-8.81153E-12	-8.00228E-11	9.02437E-11	-1.51235E-11
M	-1.01816E-14	7.54853E-14	1.18858E-12	-6.30425E-13	-1.51235E-11	3.28595E-11

Date of computation: 2025-11-24 19:20 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

19.19

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

400 - 900*

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

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude
[3]	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

5746

Unit

Source

[1]

Unobserved

Value

514

Unit

Source

[1]

Normalized RMS of residuals

Value

0.541847

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2008-11-21.32959

Unit

Source

[2]

Last Observation

Value

2024-08-15.557662

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

292 (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

2014-05-24

Unit

Source

[3]

Last Observation

Value

2014-05-25

Unit

Source

[3]

Delay (Discarded)

Value

2 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

4 (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 476904 2008WK32 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	1953-05-19 19:39	< 1 min	0.0920113	0.0920106	0.0000003
EARTH	1981-06-11 06:08	< 1 min	0.1406891	0.1406882	0.0000003
EARTH	1986-05-01 10:25	< 1 min	0.1620391	0.1620385	0.0000002
EARTH	2014-06-01 13:41	< 1 s	0.0728445	0.0728444	0.0000000
EARTH	2047-05-25 00:03	< 1 min	0.0777755	0.0777750	0.0000002
EARTH	2075-06-14 21:54	< 1 min	0.1710467	0.1710441	0.0000009
EARTH	2080-05-08 03:48	< 1 min	0.1370082	0.1370063	0.0000007
EARTH	2108-06-05 15:34	< 1 min	0.0887405	0.0887388	0.0000006

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
34.53932730	146.14761770	0.07031252	MINIMUM
175.82190686	276.14169535	0.95780505	SADDLE
0.06978775	277.36691455	1.85876996	SADDLE
182.91322374	100.86797588	2.91854139	MAXIMUM

Download:

MOID Plots

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