Asteroids

2025SA73 help

Last update: 2025-10-15 15:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.891

Aphelion (Q)

2.238

Eccentricity (e)

0.431

Inclination (i)

2.9

deg

Orbit period (P)

714.6

Earth MOID

0.00787

U parameter

7.1

Next Earth close approach

Date

2067-01-27

Nominal distance (from Earth center)

0.06311

9441523

Maximum Brightness

23.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.5

mag

Diameter

13 - 29*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-09-30

Observatory

WFST, Lenghu

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

1.564258

1-sigma variation

0.000451

Unit

Eccentricity (e)

Value

0.430511

1-sigma variation

0.000183

Unit

Inclination (i)

Value

2.8957

1-sigma variation

0.0012

Unit

Long. of Ascending Node (Ω)

Value

194.4573

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

238.9242

1-sigma variation

0.0006

Unit

Mean Anomaly (M)

Value

358.37383

1-sigma variation

0.00262

Unit

Perihelion distance

Value

0.890828

1-sigma variation

Unit

Aphelion distance

Value

2.237688

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.637243

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.042914

1-sigma variation

Unit

MOID

Value

0.007868

1-sigma variation

Unit

Orbit Period

Value

714.5967

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.03716E-7	8.27354E-8	5.35161E-7	9.88671E-8	-2.47288E-7	1.18339E-6
e	8.27354E-8	3.36016E-8	2.17341E-7	4.01519E-8	-1.00385E-7	4.80601E-7
i	5.35161E-7	2.17341E-7	1.40669E-6	2.60364E-7	-6.51269E-7	3.10893E-6
Ω	9.88671E-8	4.01519E-8	2.60364E-7	4.89126E-8	-1.21228E-7	5.74387E-7
ω	-2.47288E-7	-1.00385E-7	-6.51269E-7	-1.21228E-7	3.14568E-7	-1.43988E-6
M	1.18339E-6	4.80601E-7	3.10893E-6	5.74387E-7	-1.43988E-6	6.87524E-6

Date of computation: 2025-10-15 15:00 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

26.548

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

13 - 29*

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

0.690444

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-30.709502

Unit

Source

[2]

Last Observation

Value

2025-10-13.913914

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

72 (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

Close Approaches for 2025SA73 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	1969-02-04 13:20	> 1 d	0.1815504	0.0529583	0.0504458
EARTH	1971-01-08 07:12	> 1 w	0.0707320	0.0507872	0.0366564
EARTH	1972-10-29 16:17	> 1 w	0.0593612	0.0032041	0.0640903
EARTH	1974-10-01 21:01	> 1 d	0.1551449	0.0039047	0.0937788
EARTH	2022-01-28 12:22	1291.0	0.0862342	0.0634098	0.0084791
EARTH	2023-12-13 12:02	> 1 d	0.1011337	0.0990894	0.0006962
EARTH	2025-10-16 09:06	< 1 min	0.0084001	0.0083900	0.0000034
MARS	2055-08-15 14:23	> 1 d	0.0305365	0.0302811	0.0080739
EARTH	2067-01-27 00:50	> 1 w	0.0631127	0.0476425	0.0918617
EARTH	2068-11-22 17:52	> 1 mo	0.0970203	0.0307510	0.0363098
EARTH	2070-10-06 07:09	> 1 w	0.1084953	0.0061429	0.1398776
EARTH	2112-02-01 05:29	> 1 w	0.0933685	0.0475211	0.2528853
EARTH	2113-12-07 13:54	> 1 mo	0.1031778	0.1029195	0.0026381
EARTH	2115-10-12 06:54	> 1 w	0.0605717	0.0084056	0.2439965

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
327.14689769	282.94170431	0.00786767	MINIMUM
30.84507560	19.00277331	0.04780739	MINIMUM
0.35007783	333.09895099	0.10297861	SADDLE
179.66537792	151.62200525	1.22333731	SADDLE
358.92061949	150.88625212	1.90642392	SADDLE
179.52201886	331.53735379	3.22261801	MAXIMUM

Download:

MOID Plots

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