Asteroids

2025BA1 help

Last update: 2026-09-06 13:00 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.796

Aphelion (Q)

2.724

Eccentricity (e)

0.548

Inclination (i)

1.0

deg

Orbit period (P)

852.7

Earth MOID

0.00001

U parameter

8.0

Next Earth close approach

Date

2032-01-18

Nominal distance (from Earth center)

0.02646

3958210

Maximum Brightness

22.4

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.6

mag

Diameter

8 - 18*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-01-19

Observatory

University of Arizona 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

1.759792

1-sigma variation

0.002388

Unit

Eccentricity (e)

Value

0.547784

1-sigma variation

0.000705

Unit

Inclination (i)

Value

0.9519

1-sigma variation

0.0010

Unit

Long. of Ascending Node (Ω)

Value

114.8305

1-sigma variation

0.0045

Unit

Arg. of Perihelion (ω)

Value

297.2695

1-sigma variation

0.0037

Unit

Mean Anomaly (M)

Value

233.16041

1-sigma variation

0.48015

Unit

Perihelion distance

Value

0.795807

1-sigma variation

Unit

Aphelion distance

Value

2.723777

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.000136

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.629906

1-sigma variation

Unit

MOID

Value

0.000006

1-sigma variation

Unit

Orbit Period

Value

852.6886

1-sigma variation

Unit

U parameter

Value

8.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.70397E-6	1.68234E-6	2.40161E-6	-6.14717E-6	-1.23361E-6	-1.14674E-3
e	1.68234E-6	4.96354E-7	7.09010E-7	-1.76734E-6	-4.09878E-7	-3.38234E-4
i	2.40161E-6	7.09010E-7	1.01516E-6	-2.38723E-6	-7.21639E-7	-4.82876E-4
Ω	-6.14717E-6	-1.76734E-6	-2.38723E-6	1.98692E-5	-1.19848E-5	1.23233E-3
ω	-1.23361E-6	-4.09878E-7	-7.21639E-7	-1.19848E-5	1.36693E-5	2.51536E-4
M	-1.14674E-3	-3.38234E-4	-4.82876E-4	1.23233E-3	2.51536E-4	2.30544E-1

Date of computation: 2026-09-06 13:00 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

27.589

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

8 - 18*

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

599

Unit

Source

[1]

Normalized RMS of residuals

Value

0.797681

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-01-19.421333

Unit

Source

[2]

Last Observation

Value

2025-01-22.601998

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2025BA1 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	1962-01-11 10:04	> 1 mo	0.0274337	0.0003004	1.6893462
EARTH	1978-11-10 00:48	> 1 mo	0.1876539	0.1224724	0.0239414
EARTH	1995-09-14 16:33	> 1 w	0.0312605	0.0134253	0.1404488
EARTH	2008-01-26 10:36	> 1 w	0.1488802	0.0005773	0.1846468
EARTH	2012-09-04 01:09	> 1 w	0.0878620	0.0133844	0.1598896
EARTH	2025-01-14 20:39	6.6	0.0018402	0.0018268	0.0000045
EARTH	2032-01-18 01:27	> 1 w	0.0264590	0.0000496	0.0894038
EARTH	2039-01-28 03:07	> 1 w	0.1813063	0.0007083	0.2464906
EARTH	2085-08-31 22:43	> 1 mo	0.1164594	0.0130437	2.1882526
EARTH	2092-09-09 22:23	> 1 mo	0.0134302	0.0131220	0.4910068
EARTH	2099-10-03 23:29	> 1 mo	0.1356245	0.0134685	23.7958905
EARTH	2106-11-10 15:35	> 1 mo	0.1943529	0.0934734	3.3402520
MARS	2111-11-25 21:15	> 1 mo	0.0319106	0.0228638	41.7160635
EARTH	2113-12-16 13:59	> 1 mo	0.1582925	0.0073162	44.7219416
EARTH	2121-01-14 09:01	> 1 mo	0.0285951	0.0009157	100.3108344

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
36.38808712	10.12932043	0.00000559	MINIMUM
321.23558815	242.41769927	0.01302062	MINIMUM
358.48107082	305.85535789	0.19474913	SADDLE
179.56331717	127.18400322	1.71372758	SADDLE
358.49560975	125.90069568	1.80583190	SADDLE
179.58025750	307.19884611	3.71365256	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025BA1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2032-01-15.747	63246.747	-0.298	0.49 ± 0.001	1.86E3	4.97E-4	6.16E-2	-3.53
2037-01-15.090	65073.090	-0.286	1.12 ± 0.000	3.37E6	1.53E-7	6.16E-2	-7.30
2041-01-15.049	66534.049	-0.320	0.80 ± 0.011	2.18E6	3.66E-7	6.17E-2	-7.06
2043-01-15.758	67264.758	-0.311	1.04 ± 0.032	6.20E6	9.69E-8	6.17E-2	-7.69
2044-01-15.770	67629.770	-0.269	1.11 ± 0.095	1.48E6	6.50E-7	6.15E-2	-6.89
2048-01-15.877	69090.877	-0.301	0.96 ± 0.000	1.74E8	3.93E-9	6.16E-2	-9.19
2049-01-15.157	69456.157	-0.277	0.90 ± 0.000	4.62E6	1.60E-7	6.16E-2	-7.60
2055-01-15.869	71647.869	-0.353	1.14 ± 0.004	6.29E5	7.44E-7	6.17E-2	-7.04
2058-01-15.413	72743.413	4.395	0.69 ± 0.004	8.21E3	6.90E-9	6.34E-2	-9.10
2058-01-15.423	72743.423	-0.233	0.96 ± 0.000	6.91E5	9.95E-7	6.15E-2	-6.95
2061-01-15.129	73839.129	-0.274	1.11 ± 0.035	3.60E6	1.83E-7	6.14E-2	-7.73
2063-01-15.643	74569.643	-0.259	1.08 ± 0.027	4.98E6	1.16E-7	6.14E-2	-7.95
2065-01-15.243	75300.243	4.378	1.18 ± 0.000	6.80E5	4.47E-11	6.35E-2	-11.38
2070-01-15.487	77126.487	4.407	1.03 ± 0.014	2.29E6	1.75E-11	6.34E-2	-11.84
2085-01-15.188	82605.188	-0.272	0.84 ± 0.069	5.71E6	1.61E-7	6.12E-2	-8.01
2087-01-15.585	83335.585	-0.262	1.18 ± 0.000	1.50E7	2.93E-8	6.12E-2	-8.77
2097-01-15.284	86988.284	-0.269	0.87 ± 0.000	4.69E7	1.70E-8	6.12E-2	-9.07
2099-01-15.687	87718.687	-0.268	0.83 ± 0.000	7.96E6	9.76E-8	6.10E-2	-8.32
2099-01-15.698	87718.698	-0.263	0.21 ± 0.620	5.18E7	1.65E-8	6.10E-2	-9.09


Based on 21 optical observations (of which 1 are rejected as outliers) from 2025/01/19.421 to 2025/01/22.602.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.30 and 1.30 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260906 131751.982 UTC.

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