Asteroids

2023BM4 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.777

Aphelion (Q)

1.180

Eccentricity (e)

0.206

Inclination (i)

1.5

deg

Orbit period (P)

353.5

Earth MOID

0.02383

U parameter

3.0

Next Earth close approach

Date

2026-05-30

Nominal distance (from Earth center)

0.03126

4676153

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.6

mag

Diameter

50 - 110*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-01-26

Observatory

MAPS, San Pedro de Atacama

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

0.978392

1-sigma variation

3.061E-7

Unit

Eccentricity (e)

Value

0.206228

1-sigma variation

0.000002

Unit

Inclination (i)

Value

1.5219

1-sigma variation

1.298E-5

Unit

Long. of Ascending Node (Ω)

Value

186.5467

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

174.2521

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

279.48809

1-sigma variation

0.00044

Unit

Perihelion distance

Value

0.776621

1-sigma variation

Unit

Aphelion distance

Value

1.180164

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.180922

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.224840

1-sigma variation

Unit

MOID

Value

0.023830

1-sigma variation

Unit

Orbit Period

Value

353.4826

1-sigma variation

Unit

U parameter

Value

3.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.36688E-14	-7.20000E-13	-3.84593E-12	4.16034E-12	2.62156E-11	-1.33227E-10
e	-7.20000E-13	5.54604E-12	2.93613E-11	-2.69947E-11	-2.02351E-10	1.01825E-9
i	-3.84593E-12	2.93613E-11	1.68425E-10	-4.17023E-10	-8.97303E-10	5.55486E-9
Ω	4.16034E-12	-2.69947E-11	-4.17023E-10	1.29932E-8	-1.07415E-8	-6.91588E-9
ω	2.62156E-11	-2.02351E-10	-8.97303E-10	-1.07415E-8	2.03010E-8	-3.90217E-8
M	-1.33227E-10	1.01825E-9	5.55486E-9	-6.91588E-9	-3.90217E-8	1.93322E-7

Date of computation: 2026-03-17 23:26 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

23.649

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

50 - 110*

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]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

826

Unit

Source

[1]

Unobserved

Value

353

Unit

Source

[1]

Normalized RMS of residuals

Value

0.450396

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-01-26.23227

Unit

Source

[2]

Last Observation

Value

2025-05-01.25244

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

127 (1)

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

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 2023BM4 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	1962-01-05 10:00	9.3	0.0396285	0.0392019	0.0001428
EARTH	1962-11-24 04:46	186.7	0.1559779	0.1556856	0.0000974
EARTH	1963-02-04 21:01	113.9	0.1391100	0.1388514	0.0000862
EARTH	1964-03-16 18:57	80.7	0.1848742	0.1848480	0.0000087
EARTH	1965-04-25 14:19	60.2	0.1480310	0.1479316	0.0000331
EARTH	1965-07-18 14:44	91.0	0.1690553	0.1689310	0.0000414
EARTH	1966-05-31 00:03	1.6	0.0246173	0.0245693	0.0000161
EARTH	1992-01-11 13:51	< 1 min	0.1737514	0.1736835	0.0000226
EARTH	1993-01-04 23:10	< 1 min	0.0347430	0.0346937	0.0000165
EARTH	1993-11-06 03:36	32.3	0.1864525	0.1864205	0.0000107
EARTH	1994-02-19 21:35	25.6	0.1642612	0.1642374	0.0000079
EARTH	1995-03-31 00:25	30.5	0.1808934	0.1808684	0.0000083
EARTH	1996-05-19 02:40	25.7	0.1001460	0.1000199	0.0000420
EARTH	1997-05-28 08:08	2.2	0.0945809	0.0944238	0.0000523
EARTH	2022-01-09 19:39	< 1 min	0.1395289	0.1395225	0.0000021
EARTH	2023-01-08 19:55	< 1 min	0.0742623	0.0742602	0.0000007
EARTH	2024-03-03 18:41	< 1 min	0.1767597	0.1767539	0.0000020
EARTH	2025-04-13 23:55	< 1 min	0.1646126	0.1646079	0.0000016
EARTH	2025-07-31 13:29	1.4	0.1903253	0.1903196	0.0000019
EARTH	2026-05-30 18:29	< 1 min	0.0312582	0.0312566	0.0000005
EARTH	2027-05-25 05:21	< 1 min	0.1789164	0.1789052	0.0000037
EARTH	2051-01-09 09:43	2.5	0.1293686	0.1292090	0.0000532
EARTH	2052-01-12 14:42	19.1	0.0869645	0.0868284	0.0000454
EARTH	2053-03-07 15:49	29.8	0.1783784	0.1783540	0.0000081
EARTH	2054-04-19 16:49	24.8	0.1549737	0.1549448	0.0000097
EARTH	2054-07-24 02:10	34.1	0.1788579	0.1788203	0.0000125
EARTH	2055-05-30 09:17	< 1 min	0.0260015	0.0259722	0.0000098
EARTH	2078-01-10 08:47	3.2	0.1445489	0.1442888	0.0000867
EARTH	2079-01-11 23:01	33.6	0.0826202	0.0823583	0.0000873
EARTH	2080-03-09 09:00	74.9	0.1781783	0.1781439	0.0000115
EARTH	2081-04-24 20:20	80.7	0.1456628	0.1455225	0.0000468
EARTH	2081-07-16 20:48	119.7	0.1684003	0.1682324	0.0000560
EARTH	2082-05-29 11:07	3.5	0.0486337	0.0483497	0.0000947
EARTH	2104-01-11 07:55	13.3	0.1163670	0.1154495	0.0003059
EARTH	2105-01-26 10:28	229.0	0.1133027	0.1126137	0.0002297
EARTH	2106-03-20 23:14	258.2	0.1794213	0.1793977	0.0000079
EARTH	2107-05-15 05:55	234.5	0.1087174	0.1078752	0.0002808
EARTH	2108-05-27 14:37	17.1	0.1172248	0.1161015	0.0003745

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
258.87144561	146.66092550	0.02381898	MINIMUM
91.70310597	3.27378271	0.02621718	MINIMUM
175.95782534	75.68681606	0.18206304	SADDLE
353.94228282	253.54776016	0.22852905	SADDLE
354.17164234	73.81991606	1.77297058	SADDLE
176.12134002	255.81214245	2.18341919	MAXIMUM

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MOID Plots

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