Asteroids

2025BG4 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.614

Aphelion (Q)

2.145

Eccentricity (e)

0.555

Inclination (i)

13.1

deg

Orbit period (P)

592.0

Earth MOID

0.02756

U parameter

8.5

Next Earth close approach

Date

2028-08-14

Nominal distance (from Earth center)

0.07576

11333034

Maximum Brightness

24.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.8

mag

Diameter

18 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-01-24

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.379826

1-sigma variation

0.002764

Unit

Eccentricity (e)

Value

0.554865

1-sigma variation

0.001263

Unit

Inclination (i)

Value

13.0536

1-sigma variation

0.0329

Unit

Long. of Ascending Node (Ω)

Value

124.7975

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

100.7686

1-sigma variation

0.0067

Unit

Mean Anomaly (M)

Value

267.30577

1-sigma variation

0.76961

Unit

Perihelion distance

Value

0.614209

1-sigma variation

Unit

Aphelion distance

Value

2.145444

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.081019

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.150504

1-sigma variation

Unit

MOID

Value

0.027560

1-sigma variation

Unit

Orbit Period

Value

592.0181

1-sigma variation

Unit

U parameter

Value

8.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.63924E-6	3.48990E-6	9.08349E-5	-5.61657E-7	-1.83968E-5	-2.12714E-3
e	3.48990E-6	1.59432E-6	4.14969E-5	-2.56586E-7	-8.40431E-6	-9.71761E-4
i	9.08349E-5	4.14969E-5	1.08008E-3	-6.67820E-6	-2.18743E-4	-2.52929E-2
Ω	-5.61657E-7	-2.56586E-7	-6.67820E-6	4.13632E-8	1.35256E-6	1.56393E-4
ω	-1.83968E-5	-8.40431E-6	-2.18743E-4	1.35256E-6	4.43156E-5	5.12259E-3
M	-2.12714E-3	-9.71761E-4	-2.52929E-2	1.56393E-4	5.12259E-3	5.92302E-1

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

25.807

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

18 - 40*

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

Unit

Source

[1]

Unobserved

Value

443

Unit

Source

[1]

Normalized RMS of residuals

Value

0.667492

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-01-24.329971

Unit

Source

[2]

Last Observation

Value

2025-02-01.112594

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

39 (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

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 2025BG4 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	1978-02-03 16:06	> 1 mo	0.0762177	0.0246659	0.7395981
EARTH	1981-08-16 14:25	> 1 mo	0.1093445	0.0601526	0.5458018
EARTH	1991-01-25 15:47	> 1 w	0.1324843	0.0246928	0.4230480
EARTH	1994-08-05 11:09	> 1 w	0.1153459	0.0621013	0.3507481
EARTH	2025-02-01 02:53	< 1 s	0.0332620	0.0330343	0.0000759
EARTH	2028-08-14 00:48	> 1 d	0.0757567	0.0613491	0.0343815
EARTH	2038-01-24 08:31	> 1 w	0.1625661	0.0263248	0.2329633
EARTH	2041-08-04 03:11	> 1 w	0.1306515	0.0655790	0.2351429
EARTH	2072-02-11 13:13	> 1 w	0.1997032	0.0227983	0.3482496
EARTH	2085-02-04 12:37	> 1 w	0.0872293	0.0303135	0.1708553
EARTH	2088-08-19 09:32	> 1 d	0.1530136	0.0658667	0.0976355
EARTH	2098-02-01 23:38	> 1 d	0.0378971	0.0308382	0.0530405
EARTH	2101-08-18 08:35	> 1 w	0.1142433	0.0659167	0.1504176
EARTH	2111-02-02 22:05	> 1 w	0.0343017	0.0318377	0.1677799
EARTH	2114-08-19 02:32	> 1 mo	0.1215434	0.0668250	0.7013490
EARTH	2124-02-05 20:34	> 1 mo	0.0753512	0.0319265	1.6562624

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
300.14229027	29.41668483	0.02735469	MINIMUM
59.51446483	218.33382593	0.06156528	MINIMUM
0.05497003	123.25825920	0.43359066	SADDLE
179.84980325	304.85455963	1.19951811	SADDLE
1.36875211	305.84315240	1.59544538	SADDLE
180.85653972	125.41144760	3.13894598	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out