Asteroids

2025SA1 help

Last update: 2025-09-25 13:26 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.965

Aphelion (Q)

2.449

Eccentricity (e)

0.435

Inclination (i)

8.1

deg

Orbit period (P)

814.8

Earth MOID

0.00368

U parameter

7.4

Next Earth close approach

Date

2025-09-28

Nominal distance (from Earth center)

0.0129

1930283

Maximum Brightness

18.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.3

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-09-17

Observatory

Pan-STARRS 2, Haleakala

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.707336

1-sigma variation

0.000860

Unit

Eccentricity (e)

Value

0.434562

1-sigma variation

0.000291

Unit

Inclination (i)

Value

8.0615

1-sigma variation

0.0039

Unit

Long. of Ascending Node (Ω)

Value

186.0995

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

210.4024

1-sigma variation

0.0020

Unit

Mean Anomaly (M)

Value

12.46734

1-sigma variation

0.00750

Unit

Perihelion distance

Value

0.965393

1-sigma variation

Unit

Aphelion distance

Value

2.449279

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.216270

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.005211

1-sigma variation

Unit

MOID

Value

0.003679

1-sigma variation

Unit

Orbit Period

Value

814.8488

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.39439E-7	2.50506E-7	3.39186E-6	3.86202E-7	-1.72287E-6	-6.44746E-6
e	2.50506E-7	8.48665E-8	1.14912E-6	1.30797E-7	-5.83519E-7	-2.18430E-6
i	3.39186E-6	1.14912E-6	1.55609E-5	1.76796E-6	-7.88986E-6	-2.95779E-5
Ω	3.86202E-7	1.30797E-7	1.76796E-6	2.07928E-7	-9.22321E-7	-3.36252E-6
ω	-1.72287E-6	-5.83519E-7	-7.88986E-6	-9.22321E-7	4.09852E-6	1.50036E-5
M	-6.44746E-6	-2.18430E-6	-2.95779E-5	-3.36252E-6	1.50036E-5	5.62222E-5

Date of computation: 2025-09-25 13:26 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

26.287

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

15 - 30*

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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.514594

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-17.490317

Unit

Source

[2]

Last Observation

Value

2025-09-24.73646

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

32 (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

Close Approaches for 2025SA1 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
EARTH	1951-09-29 15:57	> 1 w	0.0048724	0.0019695	0.1079835
EARTH	1960-09-08 08:59	> 1 w	0.1741318	0.0175468	0.1478701
EARTH	2007-11-25 05:16	> 1 d	0.1303720	0.1197791	0.0038620
EARTH	2016-10-11 09:12	> 1 w	0.0408946	0.0047963	0.0285828
EARTH	2025-09-28 00:29	< 1 s	0.0129033	0.0128809	0.0000075
EARTH	2054-09-26 01:24	> 1 w	0.0257949	0.0030259	0.1114014
EARTH	2074-09-23 16:50	> 1 mo	0.0417846	0.0019200	1.5473555
EARTH	2105-11-10 17:57	> 1 mo	0.0999201	0.0756137	5.3439476
EARTH	2125-09-23 20:03	> 1 mo	0.0481636	0.0020842	17.0108906

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
341.32973245	266.82680047	0.00367912	MINIMUM
179.95180296	114.55005969	1.44563707	SADDLE
358.54227934	113.59239131	1.97208451	SADDLE
178.95175573	293.92873185	3.44113684	MAXIMUM

Download:

MOID Plots

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