Asteroids

2009WB105 help

Last update: 2024-04-25 08:10 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.617

Aphelion (Q)

1.034

Eccentricity (e)

0.253

Inclination (i)

38.4

deg

Orbit period (P)

273.9

Earth MOID

0.03906

U parameter

0.8

A₂

137.7

10^-15au/days²

Next Earth close approach

Date

2024-11-25

Nominal distance (from Earth center)

0.03868

5786686

Maximum Brightness

16.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

23.4

mag

Diameter

50 - 120*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2009-11-25

Observatory

Catalina Sky 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

0.825462

1-sigma variation

2.691E-9

Unit

Eccentricity (e)

Value

0.252532

1-sigma variation

2.361E-7

Unit

Inclination (i)

Value

38.4057

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

242.5906

1-sigma variation

2.073E-6

Unit

Arg. of Perihelion (ω)

Value

347.4825

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

246.19884

1-sigma variation

0.00016

Unit

Perihelion distance

Value

0.617006

1-sigma variation

Unit

Aphelion distance

Value

1.033918

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.392737

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.039295

1-sigma variation

Unit

MOID

Value

0.039061

1-sigma variation

Unit

Orbit Period

Value

273.9328

1-sigma variation

Unit

U parameter

Value

0.8

1-sigma variation

Unit

A₂

Value

137.68282

1-sigma variation

8.43153

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	7.23939E-18	4.12565E-17	1.60796E-13	-1.74922E-15	8.05037E-14	-1.39907E-13	2.09305E-8
e	4.12565E-17	5.57345E-14	2.04257E-11	-1.05798E-13	-1.73274E-11	2.96519E-11	7.89322E-7
i	1.60796E-13	2.04257E-11	1.93743E-8	-1.46668E-10	7.15385E-12	5.79449E-10	7.70214E-4
Ω	-1.74922E-15	-1.05798E-13	-1.46668E-10	4.29573E-12	-4.40103E-11	6.45004E-11	-6.84806E-6
ω	8.05037E-14	-1.73274E-11	7.15385E-12	-4.40103E-11	9.35246E-9	-1.56281E-8	5.46504E-5
M	-1.39907E-13	2.96519E-11	5.79449E-10	6.45004E-11	-1.56281E-8	2.61671E-8	-9.19255E-5
A₂	2.09305E-8	7.89322E-7	7.70214E-4	-6.84806E-6	5.46504E-5	-9.19255E-5	7.10907E1

Date of computation: 2024-04-23 10:08 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

23.448

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

50 - 120*

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 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

4392

Unit

Source

[1]

Unobserved

Value

873

Unit

Source

[1]

Normalized RMS of residuals

Value

0.495206

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2009-11-25.18636

Unit

Source

[2]

Last Observation

Value

2021-12-04.07575

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

178 (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 2009WB105 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	1985-11-25 09:15	< 1 min	0.1977958	0.1975323	0.0000878
EARTH	1988-11-25 03:26	< 1 min	0.1680853	0.1678642	0.0000737
EARTH	1991-11-25 21:23	< 1 min	0.1397367	0.1395563	0.0000602
EARTH	1994-11-25 15:05	< 1 min	0.1141935	0.1140521	0.0000472
EARTH	1997-11-25 08:44	< 1 min	0.0912594	0.0911553	0.0000347
EARTH	2000-11-25 02:02	< 1 min	0.0727442	0.0726734	0.0000236
EARTH	2003-11-25 19:21	< 1 min	0.0586024	0.0585607	0.0000139
EARTH	2006-11-25 12:44	< 1 min	0.0488684	0.0488487	0.0000066
EARTH	2009-11-25 06:20	< 1 min	0.0432459	0.0432391	0.0000023
EARTH	2012-11-25 00:05	< 1 s	0.0405684	0.0405670	0.0000005
EARTH	2015-11-25 18:02	< 1 s	0.0393480	0.0393477	0.0000001
EARTH	2018-11-25 12:13	< 1 s	0.0389293	0.0389286	0.0000002
EARTH	2021-11-25 06:30	< 1 s	0.0386855	0.0386837	0.0000006
EARTH	2024-11-25 00:43	< 1 min	0.0386816	0.0386776	0.0000013
EARTH	2027-11-25 18:58	< 1 min	0.0387773	0.0387686	0.0000029
EARTH	2030-11-25 13:23	< 1 min	0.0390761	0.0390574	0.0000063
EARTH	2033-11-25 07:53	< 1 min	0.0398115	0.0397699	0.0000139
EARTH	2036-11-25 02:30	< 1 min	0.0417005	0.0416082	0.0000309
EARTH	2039-11-25 21:21	< 1 min	0.0455429	0.0453545	0.0000631
EARTH	2042-11-25 16:36	< 1 min	0.0531501	0.0528095	0.0001140
EARTH	2045-11-25 12:00	< 1 min	0.0650941	0.0645750	0.0001734
EARTH	2048-11-25 07:20	< 1 min	0.0827108	0.0820182	0.0002312
EARTH	2051-11-26 02:24	< 1 min	0.1043796	0.1035375	0.0002810
EARTH	2054-11-25 21:18	< 1 min	0.1299958	0.1290200	0.0003254
EARTH	2057-11-25 15:58	< 1 min	0.1583799	0.1572837	0.0003655
EARTH	2060-11-25 10:21	< 1 min	0.1890790	0.1878658	0.0004045

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