Asteroids

250458 2004BO41 help

Last update: 2025-05-21 08:47 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.517

Aphelion (Q)

1.521

Eccentricity (e)

0.493

Inclination (i)

35.6

deg

Orbit period (P)

375.5

Earth MOID

0.08887

U parameter

0.6

Next Earth close approach

Date

2052-09-03

Nominal distance (from Earth center)

0.09488

14194187

Maximum Brightness

18.2

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

17.9

mag

Diameter

600

Taxonomic type

Rotation period (T)

16.19

Discovery Information

Discovery Date

2004-01-19

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.018570

1-sigma variation

6.793E-9

Unit

Eccentricity (e)

Value

0.492894

1-sigma variation

1.980E-7

Unit

Inclination (i)

Value

35.5531

1-sigma variation

1.763E-5

Unit

Long. of Ascending Node (Ω)

Value

337.7364

1-sigma variation

7.030E-6

Unit

Arg. of Perihelion (ω)

Value

254.4564

1-sigma variation

1.437E-5

Unit

Mean Anomaly (M)

Value

204.19464

1-sigma variation

0.00004

Unit

Perihelion distance

Value

0.516523

1-sigma variation

Unit

Aphelion distance

Value

1.520617

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.120538

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.309419

1-sigma variation

Unit

MOID

Value

0.088871

1-sigma variation

Unit

Orbit Period

Value

375.4783

1-sigma variation

Unit

U parameter

Value

0.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.61453E-17	1.20269E-15	7.53188E-14	2.79477E-14	-8.50302E-14	-2.67532E-13
e	1.20269E-15	3.92199E-14	2.32373E-12	8.30361E-13	-2.70288E-12	-7.37621E-12
i	7.53188E-14	2.32373E-12	3.10702E-10	1.00776E-10	-1.83867E-10	-4.81873E-10
Ω	2.79477E-14	8.30361E-13	1.00776E-10	4.94213E-11	-6.37430E-11	-1.93523E-10
ω	-8.50302E-14	-2.70288E-12	-1.83867E-10	-6.37430E-11	2.06505E-10	5.18097E-10
M	-2.67532E-13	-7.37621E-12	-4.81873E-10	-1.93523E-10	5.18097E-10	1.59703E-9

Date of computation: 2025-05-21 08:47 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

16.19

Unit

Source

[1]

Quality

Value

Unit

Source

[1]

Amplitude

Value

0.85

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

17.884

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.2825

Unit

Source

[3]

Diameter

Value

600

Unit

Source

[3]

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

[4]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Warner, B.D. (2017) MPB 44, 22-36. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2016 JULY-SEPTEMBER) (46 NEAs)
[2]	ESA Aegis	ESA orbit determination and impact monitoring system
[3]	EARN	1.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs)
[4]	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

7273

Unit

Source

[1]

Unobserved

Value

563

Unit

Source

[1]

Normalized RMS of residuals

Value

0.333494

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-01-19.4622

Unit

Source

[2]

Last Observation

Value

2023-12-18.073332

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

847 (4)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2016-09-07

Unit

Source

[3]

Last Observation

Value

2016-09-08

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (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 250458 2004BO41 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
VENUS	1978-06-01 19:31	< 1 min	0.0237413	0.0237076	0.0000112
EARTH	1978-08-30 04:17	< 1 min	0.1707340	0.1707097	0.0000081
EARTH	1979-09-06 10:08	< 1 min	0.0906043	0.0906014	0.0000010
EARTH	1980-09-12 18:50	< 1 min	0.1874003	0.1873894	0.0000036
VENUS	1981-06-30 06:21	< 1 min	0.0065970	0.0065960	0.0000003
EARTH	2015-08-31 15:34	< 1 s	0.1472868	0.1472864	0.0000001
EARTH	2016-09-07 06:48	< 1 s	0.0999456	0.0999456	0.0000000
EARTH	2052-09-03 20:55	< 1 min	0.0948823	0.0948808	0.0000005
EARTH	2053-09-11 14:43	< 1 min	0.1593105	0.1593066	0.0000013
VENUS	2056-07-18 23:58	< 1 min	0.0136853	0.0136790	0.0000021
VENUS	2059-08-17 09:58	< 1 min	0.0136931	0.0136910	0.0000007
EARTH	2088-08-28 17:00	< 1 min	0.1926475	0.1926065	0.0000137
EARTH	2089-09-05 08:47	1.0	0.0898526	0.0898497	0.0000009
EARTH	2090-09-13 03:34	1.1	0.1817664	0.1817247	0.0000139
EARTH	2125-09-02 19:06	2.4	0.1250787	0.1250017	0.0000257

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
81.30737237	241.36910845	0.08887097	MINIMUM
297.88482542	40.40180685	0.25530387	MINIMUM
8.24961424	142.37486409	0.66203264	SADDLE
190.09411428	314.23262938	0.90286789	SADDLE
5.82064854	317.17921170	1.44275616	SADDLE
175.87210620	124.40644539	2.42501587	MAXIMUM

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MOID Plots

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