Asteroids

2023BU help

Last update: 2026-07-30 14:25 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.984

Aphelion (Q)

1.229

Eccentricity (e)

0.110

Inclination (i)

3.7

deg

Orbit period (P)

425.1

Earth MOID

0.00005

U parameter

1.9

Next Earth close approach

Date

2029-12-24

Nominal distance (from Earth center)

0.09183

13737972

Maximum Brightness

27.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

29.7

mag

Diameter

3 - 7*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-01-21

Observatory

MARGO, Nauchnyi

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

1.106509

1-sigma variation

7.889E-8

Unit

Eccentricity (e)

Value

0.110380

1-sigma variation

6.354E-8

Unit

Inclination (i)

Value

3.7320

1-sigma variation

1.326E-6

Unit

Long. of Ascending Node (Ω)

Value

125.1107

1-sigma variation

7.491E-7

Unit

Arg. of Perihelion (ω)

Value

356.0964

1-sigma variation

1.777E-5

Unit

Mean Anomaly (M)

Value

324.89936

1-sigma variation

0.00012

Unit

Perihelion distance

Value

0.984372

1-sigma variation

Unit

Aphelion distance

Value

1.228645

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.000054

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.212559

1-sigma variation

Unit

MOID

Value

0.000049

1-sigma variation

Unit

Orbit Period

Value

425.1388

1-sigma variation

Unit

U parameter

Value

1.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.22378E-15	5.01038E-15	-5.97437E-14	3.41169E-14	2.53468E-13	-9.06996E-12
e	5.01038E-15	4.03673E-15	-4.86771E-14	2.71880E-14	1.72920E-13	-7.27670E-12
i	-5.97437E-14	-4.86771E-14	1.75744E-12	3.15339E-13	2.90178E-12	8.22824E-11
Ω	3.41169E-14	2.71880E-14	3.15339E-13	5.61108E-13	3.91423E-12	-5.20408E-11
ω	2.53468E-13	1.72920E-13	2.90178E-12	3.91423E-12	3.15826E-10	-6.14360E-10
M	-9.06996E-12	-7.27670E-12	8.22824E-11	-5.20408E-11	-6.14360E-10	1.34144E-8

Date of computation: 2026-07-30 14:25 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

29.699

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

3 - 7*

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 Aegis	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

Unit

Source

[1]

Unobserved

Value

1279

Unit

Source

[1]

Normalized RMS of residuals

Value

0.267513

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-01-21.342991

Unit

Source

[2]

Last Observation

Value

2023-01-31.919031

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1784 (26)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2023-01-29

Unit

Source

[3]

Last Observation

Value

2023-01-30

Unit

Source

[3]

Delay (Discarded)

Value

2 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

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Computation parameters

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Initial Date: *

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 2023BU 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	1965-09-09 16:49	20.1	0.0950865	0.0946194	0.0001557
EARTH	1966-08-16 02:00	129.9	0.0454289	0.0452342	0.0000651
EARTH	1967-05-19 11:17	123.0	0.0944227	0.0943991	0.0000079
EARTH	1968-02-01 02:46	4.0	0.0176517	0.0175919	0.0000199
EARTH	1969-01-30 23:54	< 1 min	0.0743581	0.0742707	0.0000291
EARTH	1970-01-27 09:37	< 1 min	0.1821080	0.1820172	0.0000303
EARTH	2018-09-03 21:04	< 1 min	0.1877444	0.1877377	0.0000022
EARTH	2019-08-30 03:05	< 1 min	0.0832752	0.0832707	0.0000015
EARTH	2020-08-21 06:03	< 1 min	0.0200099	0.0200091	0.0000003
EARTH	2021-06-12 01:09	< 1 min	0.0836166	0.0836164	0.0000001
EARTH	2021-11-20 01:24	< 1 min	0.0709840	0.0709839	0.0000000
EARTH	2022-04-10 13:40	< 1 min	0.0841984	0.0841982	0.0000001
EARTH	2023-01-27 00:27	< 1 s	0.0000666	0.0000666	0.0000000
EARTH	2029-12-24 20:47	< 1 min	0.0918327	0.0918191	0.0000045
EARTH	2030-04-23 16:48	18.2	0.1366885	0.1366812	0.0000024
EARTH	2037-06-19 04:45	3.4	0.1934719	0.1934703	0.0000005
EARTH	2051-09-04 11:32	1.3	0.1912458	0.1912452	0.0000002
EARTH	2058-11-02 04:19	14.1	0.1322510	0.1322460	0.0000017
EARTH	2059-02-24 21:37	< 1 min	0.0843621	0.0843535	0.0000029
EARTH	2066-01-26 08:36	< 1 min	0.0035277	0.0035273	0.0000001
EARTH	2076-11-07 13:11	451.9	0.1537756	0.1535782	0.0000658
EARTH	2077-03-01 06:45	13.3	0.0965647	0.0962798	0.0000950
EARTH	2104-01-11 14:57	54.1	0.0171441	0.0169363	0.0000693

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
3.47761889	20.35257055	0.00004938	MINIMUM
181.87991350	198.74110408	0.21263688	SADDLE
2.99155394	199.80904534	2.00036659	SADDLE
182.28145042	19.09635869	2.21294530	MAXIMUM

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MOID Plots

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