Asteroids

613676 2006WE4 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Atira

Perihelion (q)

0.641

Aphelion (Q)

0.928

Eccentricity (e)

0.183

Inclination (i)

24.8

deg

Orbit period (P)

253.9

Earth MOID

0.10144

U parameter

0.9

Next Earth close approach

Date

2034-01-25

Nominal distance (from Earth center)

0.1082

16186107

Maximum Brightness

22.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.9

mag

Diameter

400 - 1000*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2006-11-21

Observatory

Mt. Lemmon Survey

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

0.784722

1-sigma variation

4.349E-9

Unit

Eccentricity (e)

Value

0.183015

1-sigma variation

3.689E-7

Unit

Inclination (i)

Value

24.7669

1-sigma variation

4.999E-5

Unit

Long. of Ascending Node (Ω)

Value

310.9911

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

318.6309

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

315.96143

1-sigma variation

0.00018

Unit

Perihelion distance

Value

0.641106

1-sigma variation

Unit

Aphelion distance

Value

0.928338

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.348962

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.106561

1-sigma variation

Unit

MOID

Value

0.101437

1-sigma variation

Unit

Orbit Period

Value

253.9054

1-sigma variation

Unit

U parameter

Value

0.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.89126E-17	-4.48135E-17	3.10209E-14	-1.51263E-13	2.15932E-13	-3.72439E-13
e	-4.48135E-17	1.36119E-13	1.09383E-11	-5.16239E-12	-2.37465E-11	4.46020E-11
i	3.10209E-14	1.09383E-11	2.49935E-9	-5.53046E-10	-2.11399E-9	4.23019E-9
Ω	-1.51263E-13	-5.16239E-12	-5.53046E-10	3.42479E-9	-2.12118E-9	1.84368E-9
ω	2.15932E-13	-2.37465E-11	-2.11399E-9	-2.12118E-9	1.08305E-8	-1.79694E-8
M	-3.72439E-13	4.46020E-11	4.23019E-9	1.84368E-9	-1.79694E-8	3.14038E-8

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

18.918

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

400 - 1000*

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

6627

Unit

Source

[1]

Unobserved

Value

244

Unit

Source

[1]

Normalized RMS of residuals

Value

0.603162

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2006-11-21.52071

Unit

Source

[2]

Last Observation

Value

2025-01-12.563034

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

72 (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

2018-01-23

Unit

Source

[3]

Last Observation

Value

2018-01-23

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

1 (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 613676 2006WE4 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	1961-01-28 19:24	< 1 min	0.1072859	0.1072839	0.0000007
EARTH	1977-01-25 05:57	< 1 min	0.1059742	0.1059729	0.0000004
EARTH	1993-01-21 05:40	< 1 min	0.1496481	0.1496457	0.0000008
EARTH	2002-02-01 19:13	< 1 min	0.1440069	0.1440053	0.0000005
EARTH	2018-01-28 21:25	< 1 min	0.1054273	0.1054270	0.0000001
EARTH	2034-01-25 07:56	< 1 min	0.1081974	0.1081956	0.0000006
EARTH	2050-01-21 07:04	< 1 min	0.1549073	0.1549021	0.0000017
EARTH	2059-02-01 22:30	< 1 min	0.1402753	0.1402706	0.0000016
EARTH	2075-01-29 00:00	< 1 min	0.1037051	0.1037036	0.0000005
EARTH	2091-01-25 09:37	< 1 min	0.1105517	0.1105469	0.0000016
EARTH	2107-01-22 07:56	< 1 min	0.1607555	0.1607436	0.0000040
EARTH	2116-02-03 00:28	< 1 min	0.1360129	0.1360030	0.0000033

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
223.90099692	24.37909042	0.10137129	MINIMUM
49.58659560	225.01699667	0.33552058	MINIMUM
119.02969865	295.96102078	0.41789186	SADDLE
327.76686859	128.83184776	0.48949020	SADDLE
346.92773969	333.56969734	1.60503915	SADDLE
192.91877118	180.48467260	1.92980474	MAXIMUM

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MOID Plots

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