Asteroids

481457 2006XD2 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.728

Aphelion (Q)

1.805

Eccentricity (e)

0.425

Inclination (i)

3.6

deg

Orbit period (P)

520.7

Earth MOID

0.01809

U parameter

0.0

Next Earth close approach

Date

2026-12-15

Nominal distance (from Earth center)

0.17291

25866406

Maximum Brightness

20.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

21.1

mag

Diameter

160 - 400*

Taxonomic type

Rotation period (T)

3.700

Discovery Information

Discovery Date

2006-12-12

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

1.266666

1-sigma variation

5.098E-10

Unit

Eccentricity (e)

Value

0.425050

1-sigma variation

1.539E-8

Unit

Inclination (i)

Value

3.5609

1-sigma variation

4.902E-6

Unit

Long. of Ascending Node (Ω)

Value

65.5847

1-sigma variation

3.122E-5

Unit

Arg. of Perihelion (ω)

Value

109.5183

1-sigma variation

3.082E-5

Unit

Mean Anomaly (M)

Value

53.54572

1-sigma variation

1.869E-6

Unit

Perihelion distance

Value

0.728270

1-sigma variation

Unit

Aphelion distance

Value

1.805062

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.223372

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.106300

1-sigma variation

Unit

MOID

Value

0.018086

1-sigma variation

Unit

Orbit Period

Value

520.7048

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.59886E-19	5.51917E-18	1.13137E-15	1.82753E-15	-9.51193E-16	-8.99165E-16
e	5.51917E-18	2.36877E-16	6.23711E-15	-2.08076E-14	5.81163E-14	-1.68949E-14
i	1.13137E-15	6.23711E-15	2.40344E-11	1.32099E-10	-1.28867E-10	-6.03384E-12
Ω	1.82753E-15	-2.08076E-14	1.32099E-10	9.74892E-10	-9.59161E-10	-1.91561E-11
ω	-9.51193E-16	5.81163E-14	-1.28867E-10	-9.59161E-10	9.50073E-10	1.60214E-11
M	-8.99165E-16	-1.68949E-14	-6.03384E-12	-1.91561E-11	1.60214E-11	3.49300E-12

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

3.700

Unit

Source

[1]

[2]

Quality

Value

Unit

Source

[1]

[2]

Amplitude

Value

0.8

Unit

mag

Source

[1]

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

21.09

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

160 - 400*

Unit

Source

[4]

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

[5]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) B.Warner, CALL website
[2]	EARN	1.) Miles, R. (2008) J. Brit. Astron. Assoc. 118, 187-198.
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude
[5]	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

6469

Unit

Source

[1]

Unobserved

Value

444

Unit

Source

[1]

Normalized RMS of residuals

Value

0.476248

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2006-11-17.39568

Unit

Source

[2]

Last Observation

Value

2024-08-03.393367

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

457 (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

2016-12-21

Unit

Source

[3]

Last Observation

Value

2016-12-23

Unit

Source

[3]

Delay (Discarded)

Value

3 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

3 (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 481457 2006XD2 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	1968-06-14 09:20	< 1 s	0.0524026	0.0524019	0.0000002
EARTH	1981-06-06 07:45	< 1 min	0.0684897	0.0684876	0.0000007
EARTH	1984-01-19 02:33	< 1 min	0.1791656	0.1791641	0.0000005
VENUS	1995-09-02 21:33	< 1 min	0.0115972	0.0115972	0.0000000
EARTH	1996-12-18 19:36	< 1 s	0.0898960	0.0898959	0.0000001
VENUS	1999-12-19 09:41	< 1 min	0.0179617	0.0179615	0.0000000
EARTH	2004-06-05 00:14	< 1 s	0.0881272	0.0881270	0.0000001
EARTH	2006-12-24 07:28	< 1 s	0.0275762	0.0275761	0.0000000
EARTH	2014-06-01 20:21	< 1 s	0.1167162	0.1167160	0.0000001
EARTH	2016-12-21 07:54	< 1 s	0.0484505	0.0484505	0.0000000
EARTH	2026-12-15 02:56	< 1 s	0.1729062	0.1729061	0.0000000
MARS	2050-12-24 21:12	< 1 s	0.0318712	0.0318708	0.0000001
EARTH	2061-06-17 14:51	< 1 s	0.0738431	0.0738425	0.0000002
EARTH	2064-01-07 21:07	< 1 min	0.1414129	0.1414127	0.0000001
EARTH	2071-06-08 19:35	< 1 min	0.0671060	0.0671054	0.0000002
EARTH	2073-12-22 22:41	< 1 min	0.0369273	0.0369266	0.0000002
VENUS	2085-07-13 22:43	< 1 min	0.0211994	0.0211979	0.0000005
MARS	2098-01-01 19:54	< 1 min	0.0412260	0.0412231	0.0000010
VENUS	2116-12-02 08:50	1.2	0.0336194	0.0336085	0.0000036
EARTH	2118-06-23 23:23	< 1 min	0.1530146	0.1530074	0.0000024
VENUS	2121-02-24 11:42	< 1 min	0.0296099	0.0296069	0.0000010
MARS	2125-10-11 01:43	< 1 min	0.0333456	0.0333407	0.0000016

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
61.83736349	159.14625020	0.01781227	MINIMUM
301.24845953	349.89447092	0.02753629	MINIMUM
2.02977766	74.86737568	0.27163217	SADDLE
180.87004261	253.95917683	0.80437702	SADDLE
2.56557555	255.69695922	1.73177879	SADDLE
181.11288692	74.10957223	2.79914198	MAXIMUM

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MOID Plots

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