Asteroids

2015BK509 help

Last update: 2025-11-24 16:53 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.660

Aphelion (Q)

1.653

Eccentricity (e)

0.429

Inclination (i)

6.1

deg

Orbit period (P)

454.5

Earth MOID

0.00818

U parameter

0.0

Next Earth close approach

Date

2026-09-21

Nominal distance (from Earth center)

0.14922

22323560

Maximum Brightness

21.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.4

mag

Diameter

90 - 200*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2015-01-20

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

1.156869

1-sigma variation

1.451E-9

Unit

Eccentricity (e)

Value

0.429076

1-sigma variation

1.058E-7

Unit

Inclination (i)

Value

6.1284

1-sigma variation

7.145E-6

Unit

Long. of Ascending Node (Ω)

Value

332.9530

1-sigma variation

8.354E-6

Unit

Arg. of Perihelion (ω)

Value

280.9172

1-sigma variation

1.537E-5

Unit

Mean Anomaly (M)

Value

165.86245

1-sigma variation

2.919E-6

Unit

Perihelion distance

Value

0.660484

1-sigma variation

Unit

Aphelion distance

Value

1.653253

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.138406

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.037359

1-sigma variation

Unit

MOID

Value

0.008178

1-sigma variation

Unit

Orbit Period

Value

454.4901

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.10413E-18	4.53788E-18	4.67637E-15	-5.12439E-15	5.67868E-15	5.63068E-16
e	4.53788E-18	1.11937E-14	1.07579E-13	-4.32722E-15	1.29424E-12	1.82201E-13
i	4.67637E-15	1.07579E-13	5.10510E-11	-1.85778E-11	3.52003E-11	-1.66276E-12
Ω	-5.12439E-15	-4.32722E-15	-1.85778E-11	6.97868E-11	-7.26228E-11	2.50256E-12
ω	5.67868E-15	1.29424E-12	3.52003E-11	-7.26228E-11	2.36336E-10	1.10972E-11
M	5.63068E-16	1.82201E-13	-1.66276E-12	2.50256E-12	1.10972E-11	8.52110E-12

Date of computation: 2025-11-24 16:53 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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

22.39

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

90 - 200*

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

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

3688

Unit

Source

[1]

Unobserved

Value

331

Unit

Source

[1]

Normalized RMS of residuals

Value

0.627493

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-01-20.35462

Unit

Source

[2]

Last Observation

Value

2025-02-24.336261

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

233 (8)

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

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 2015BK509 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	1954-02-26 21:43	1.3	0.0242935	0.0242347	0.0000196
EARTH	1959-02-22 09:08	1.1	0.0824239	0.0823704	0.0000178
EARTH	1960-09-17 19:57	1.0	0.0991649	0.0991199	0.0000150
EARTH	1964-02-17 22:17	< 1 min	0.1903906	0.1903618	0.0000096
EARTH	1965-09-12 23:00	< 1 min	0.0339262	0.0339198	0.0000021
EARTH	1970-09-06 05:55	< 1 min	0.1270128	0.1269981	0.0000049
VENUS	1979-04-16 15:47	< 1 min	0.0117002	0.0116999	0.0000001
EARTH	2015-03-05 21:51	< 1 s	0.1425226	0.1425223	0.0000001
EARTH	2020-02-29 00:28	< 1 s	0.0479229	0.0479227	0.0000001
EARTH	2025-02-25 01:06	< 1 s	0.0240661	0.0240660	0.0000000
EARTH	2026-09-21 08:05	< 1 s	0.1492238	0.1492224	0.0000005
EARTH	2030-02-18 13:53	< 1 s	0.1718287	0.1718285	0.0000001
VENUS	2030-05-12 02:31	< 1 s	0.0394773	0.0394764	0.0000003
EARTH	2031-09-14 12:55	< 1 s	0.0345718	0.0345716	0.0000001
EARTH	2036-09-07 06:25	< 1 s	0.1136484	0.1136477	0.0000002
EARTH	2081-03-02 06:46	< 1 min	0.0818420	0.0818382	0.0000012
VENUS	2082-08-22 15:23	< 1 min	0.0108287	0.0108275	0.0000004
EARTH	2086-02-23 12:58	< 1 min	0.0699923	0.0699744	0.0000060
EARTH	2087-09-19 13:39	< 1 min	0.1024600	0.1024414	0.0000062
EARTH	2092-09-11 10:18	< 1 min	0.0604957	0.0604721	0.0000079

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
289.30499719	55.13480519	0.00817840	MINIMUM
71.42056385	250.75930101	0.03446328	MINIMUM
0.68619587	153.02535747	0.36596222	SADDLE
180.17524528	333.01050390	0.68114396	SADDLE
1.19922165	333.88228194	1.64368146	SADDLE
180.67967414	153.33635093	2.66603217	MAXIMUM

Download:

MOID Plots

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