Asteroids

2009BD help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

1.007

Aphelion (Q)

1.117

Eccentricity (e)

0.052

Inclination (i)

1.3

deg

Orbit period (P)

399.8

Earth MOID

0.00455

U parameter

1.4

A₁

53878.5

10^-15au/days²

A₂

-1144.9

10^-15au/days²

Next Earth close approach

Date

2034-03-26

Nominal distance (from Earth center)

0.117

17503683

Maximum Brightness

26.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.4

mag

Diameter

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2009-01-16

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.062115

1-sigma variation

3.156E-8

Unit

Eccentricity (e)

Value

0.051905

1-sigma variation

2.107E-8

Unit

Inclination (i)

Value

1.2672

1-sigma variation

1.234E-6

Unit

Long. of Ascending Node (Ω)

Value

253.1522

1-sigma variation

5.949E-6

Unit

Arg. of Perihelion (ω)

Value

316.6261

1-sigma variation

4.835E-5

Unit

Mean Anomaly (M)

Value

299.86780

1-sigma variation

0.00059

Unit

Perihelion distance

Value

1.006986

1-sigma variation

Unit

Aphelion distance

Value

1.117243

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.006462

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.114849

1-sigma variation

Unit

MOID

Value

0.004555

1-sigma variation

Unit

Orbit Period

Value

399.8117

1-sigma variation

Unit

U parameter

Value

1.4

1-sigma variation

Unit

A₁

Value

53878.53520

1-sigma variation

8366.23787

Unit

10^-15au/days²

A₂

Value

-1144.94470

1-sigma variation

83.14390

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₁	A₂
a	9.96281E-16	1.47670E-16	-2.68173E-14	1.05011E-13	5.08892E-13	-1.19670E-11	3.56328E-5	1.58250E-6
e	1.47670E-16	4.44129E-16	-1.25071E-14	4.75473E-14	-4.18807E-13	2.77665E-12	-1.31497E-4	-1.06233E-6
i	-2.68173E-14	-1.25071E-14	1.52254E-12	-6.34991E-12	-2.43707E-11	4.91444E-10	-1.71702E-3	-2.92562E-5
Ω	1.05011E-13	4.75473E-14	-6.34991E-12	3.53865E-11	5.78001E-11	-1.77919E-9	7.26053E-3	1.41034E-4
ω	5.08892E-13	-4.18807E-13	-2.43707E-11	5.78001E-11	2.33789E-9	-2.58024E-8	3.41964E-1	2.64121E-3
M	-1.19670E-11	2.77665E-12	4.91444E-10	-1.77919E-9	-2.58024E-8	3.44652E-7	-3.77295E0	-3.81681E-2
A₁	3.56328E-5	-1.31497E-4	-1.71702E-3	7.26053E-3	3.41964E-1	-3.77295E0	6.99938E7	5.58613E5
A₂	1.58250E-6	-1.06233E-6	-2.92562E-5	1.41034E-4	2.64121E-3	-3.81681E-2	5.58613E5	6.91291E3

Date of computation: 2026-06-04 23:11 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

28.404

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.45

Unit

Source

[2]

Diameter

Value

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]	EARN	1.) Mommert, M. et al. (2014) Astrophys. J. 786, 148. (Constraining the Physical Properties of Near-Earth Object 2009 BD)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

886

Unit

Source

[1]

Unobserved

Value

5518

Unit

Source

[1]

Normalized RMS of residuals

Value

0.307229

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2009-01-16.27641

Unit

Source

[2]

Last Observation

Value

2011-06-20.97255

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

197 (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

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Filters

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Final Date: *

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Max residual (arcsec):

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Computation parameters

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Final Date: *

Output option:

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Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2009BD 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	1954-07-23 04:08	32.9	0.1082163	0.1007802	0.0024788
EARTH	1955-07-16 10:32	11.6	0.0030403	0.0030282	0.0000041
EARTH	1956-07-09 09:20	< 1 min	0.0823614	0.0822273	0.0000447
EARTH	1957-07-13 03:41	< 1 min	0.1885875	0.1884460	0.0000472
EARTH	2007-02-01 03:26	< 1 min	0.1897483	0.1897452	0.0000010
EARTH	2008-02-03 06:38	< 1 min	0.0806750	0.0806731	0.0000006
EARTH	2009-01-25 06:24	< 1 s	0.0045875	0.0045875	0.0000000
EARTH	2009-10-20 17:58	< 1 min	0.0443802	0.0443802	0.0000000
EARTH	2010-05-07 18:59	< 1 min	0.0234919	0.0234918	0.0000000
EARTH	2010-07-12 02:20	< 1 min	0.0272288	0.0272287	0.0000000
EARTH	2011-06-02 00:51	< 1 s	0.0023133	0.0023132	0.0000000
EARTH	2022-12-01 07:42	17.4	0.1179981	0.1179943	0.0000013
EARTH	2023-06-26 23:49	< 1 min	0.1986355	0.1986088	0.0000089
EARTH	2034-03-26 00:11	< 1 min	0.1170049	0.1169609	0.0000147
EARTH	2034-09-12 02:23	40.4	0.1021442	0.1021309	0.0000045
EARTH	2046-04-14 16:37	6.5	0.0209772	0.0209630	0.0000047
EARTH	2061-03-28 17:37	37.3	0.0602296	0.0592722	0.0003194
EARTH	2061-09-06 19:16	1020.0	0.0727199	0.0723575	0.0001209
EARTH	2077-11-20 11:56	> 1 d	0.0876386	0.0868586	0.0002887
EARTH	2078-06-30 00:31	113.5	0.1540633	0.1428188	0.0037490
EARTH	2094-01-05 04:36	1045.2	0.0714711	0.0710410	0.0001438
EARTH	2094-06-20 14:29	50.6	0.0602821	0.0590644	0.0004060
EARTH	2109-01-17 09:49	> 1 d	0.0703756	0.0697617	0.0002056
EARTH	2109-06-18 21:52	82.3	0.0508226	0.0491950	0.0005427
EARTH	2122-11-27 09:17	> 1 w	0.1020288	0.0999912	0.0007408
EARTH	2123-06-29 18:48	202.8	0.1794880	0.1584696	0.0070079

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
36.01295243	145.76000265	0.00322843	MINIMUM
192.65116923	301.28919658	0.12463504	SADDLE
15.58804169	304.12275444	1.99991644	SADDLE
194.71415114	123.24833909	2.12554051	MAXIMUM

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MOID Plots

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