Asteroids

2008XH help

Last update: 2024-05-17 23:50 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.745

Aphelion (Q)

1.974

Eccentricity (e)

0.452

Inclination (i)

15.6

deg

Orbit period (P)

579.1

Earth MOID

0.01776

U parameter

1.4

Next Earth close approach

Date

2024-05-31

Nominal distance (from Earth center)

0.03535

5288347

Maximum Brightness

18.4

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

70 - 150*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2008-12-01

Observatory

Mt. Lemmon Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.359727

1-sigma variation

5.408E-8

Unit

Eccentricity (e)

Value

0.452024

1-sigma variation

0.000001

Unit

Inclination (i)

Value

15.6055

1-sigma variation

3.755E-5

Unit

Long. of Ascending Node (Ω)

Value

65.5458

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

265.8448

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

286.57282

1-sigma variation

0.00008

Unit

Perihelion distance

Value

0.745098

1-sigma variation

Unit

Aphelion distance

Value

1.974356

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.132544

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.034440

1-sigma variation

Unit

MOID

Value

0.017756

1-sigma variation

Unit

Orbit Period

Value

579.1299

1-sigma variation

Unit

U parameter

Value

1.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.92465E-15	-4.87012E-14	4.19118E-13	-1.68535E-12	-4.55376E-12	-1.63420E-13
e	-4.87012E-14	8.12984E-13	-7.64191E-12	2.71956E-11	7.46383E-11	4.65778E-12
i	4.19118E-13	-7.64191E-12	1.41021E-9	3.49016E-10	1.55842E-9	-2.48668E-9
Ω	-1.68535E-12	2.71956E-11	3.49016E-10	2.93590E-9	3.99615E-9	-2.81050E-9
ω	-4.55376E-12	7.46383E-11	1.55842E-9	3.99615E-9	1.11183E-8	-4.47307E-9
M	-1.63420E-13	4.65778E-12	-2.48668E-9	-2.81050E-9	-4.47307E-9	6.69717E-9

Date of computation: 2024-05-11 11:58 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

23.036

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

70 - 150*

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 ODIM	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

5637

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.631106

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2008-12-01.373

Unit

Source

[2]

Last Observation

Value

2024-05-08.575359

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

24 (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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	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 2008XH from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1959-05-27 17:56	< 1 min	0.0496282	0.0496253	0.0000010
EARTH	1962-11-17 08:49	< 1 min	0.0679646	0.0679598	0.0000016
EARTH	1978-06-02 21:38	1.0	0.0673784	0.0673429	0.0000119
EARTH	1981-11-23 01:28	< 1 min	0.1688859	0.1688648	0.0000070
EARTH	2005-05-22 14:33	< 1 min	0.1460842	0.1460636	0.0000069
EARTH	2008-11-13 10:29	< 1 min	0.0913805	0.0913751	0.0000018
EARTH	2024-05-31 13:02	< 1 min	0.0353504	0.0353485	0.0000006
EARTH	2027-11-22 18:18	< 1 min	0.1464665	0.1464503	0.0000054
EARTH	2051-05-28 08:22	< 1 min	0.0480469	0.0480252	0.0000072
EARTH	2054-11-18 16:17	< 1 min	0.0730945	0.0730757	0.0000063
EARTH	2070-06-12 20:12	< 1 min	0.1890693	0.1890649	0.0000015
EARTH	2081-11-11 09:16	< 1 min	0.1364528	0.1364433	0.0000032
EARTH	2097-05-31 06:56	< 1 min	0.0261213	0.0260994	0.0000073
EARTH	2100-11-23 07:46	1.2	0.1431523	0.1431099	0.0000141
EARTH	2124-06-01 04:43	5.1	0.0272919	0.0271792	0.0000377

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