Asteroids

2026SA help

Last update: 2026-09-16 21:15 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.883

Aphelion (Q)

2.613

Eccentricity (e)

0.495

Inclination (i)

3.2

deg

Orbit period (P)

844.1

Earth MOID

0.01061

U parameter

8.9

Next Earth close approach

Date

2026-09-20

Nominal distance (from Earth center)

0.01074

1605988

Maximum Brightness

19.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.7

mag

Diameter

12 - 28*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-16

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

1.747967

1-sigma variation

0.007568

Unit

Eccentricity (e)

Value

0.495055

1-sigma variation

0.002414

Unit

Inclination (i)

Value

3.1542

1-sigma variation

0.0155

Unit

Long. of Ascending Node (Ω)

Value

345.8443

1-sigma variation

0.0235

Unit

Arg. of Perihelion (ω)

Value

61.9842

1-sigma variation

0.0251

Unit

Mean Anomaly (M)

Value

299.60456

1-sigma variation

0.41240

Unit

Perihelion distance

Value

0.882628

1-sigma variation

Unit

Aphelion distance

Value

2.613306

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.062854

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.726975

1-sigma variation

Unit

MOID

Value

0.010609

1-sigma variation

Unit

Orbit Period

Value

844.1082

1-sigma variation

Unit

U parameter

Value

8.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.72753E-5	1.82695E-5	4.86838E-5	-9.85024E-5	7.94818E-5	3.12105E-3
e	1.82695E-5	5.82833E-6	1.51373E-5	-3.19634E-5	2.59893E-5	9.95560E-4
i	4.86838E-5	1.51373E-5	2.39295E-4	1.90729E-4	-2.52887E-4	2.64499E-3
Ω	-9.85024E-5	-3.19634E-5	1.90729E-4	5.50045E-4	-5.81153E-4	-5.37854E-3
ω	7.94818E-5	2.59893E-5	-2.52887E-4	-5.81153E-4	6.29937E-4	4.34375E-3
M	3.12105E-3	9.95560E-4	2.64499E-3	-5.37854E-3	4.34375E-3	1.70073E-1

Date of computation: 2026-09-16 21:15 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

26.651

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

12 - 28*

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

0.6

Unit

Source

[1]

Unobserved

Value

0.5

Unit

Source

[1]

Normalized RMS of residuals

Value

0.722591

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-16.247757

Unit

Source

[2]

Last Observation

Value

2026-09-16.838536

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (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

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 2026SA 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	1953-01-05 23:28	> 1 mo	0.1250045	0.0512401	0.8945424
EARTH	1959-09-24 02:19	> 1 mo	0.0304313	0.0084321	0.2689226
EARTH	1989-11-23 05:29	> 1 mo	0.1115058	0.0703256	0.5023666
EARTH	1996-09-05 12:47	> 1 mo	0.1463890	0.0069285	1.9982108
EARTH	2019-12-28 02:32	> 1 mo	0.0519457	0.0506680	0.0384045
EARTH	2026-09-20 05:47	7.4	0.0107354	0.0105934	0.0000473
EARTH	2056-11-14 15:56	> 1 mo	0.1162041	0.0977311	0.1145073
EARTH	2063-09-05 08:27	> 1 mo	0.1695970	0.0080231	1.3676088
EARTH	2087-01-03 08:51	> 1 mo	0.0781502	0.0485042	0.5584029
EARTH	2093-10-11 02:48	> 1 mo	0.0859128	0.0043522	0.1595973
EARTH	2124-01-12 08:38	> 1 mo	0.1655044	0.0477111	2.2010387

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
328.90417510	253.15286450	0.01060947	MINIMUM
28.26176151	350.45427843	0.05139153	MINIMUM
359.58867451	303.57738129	0.11737260	SADDLE
179.53705638	122.81174488	1.60606276	SADDLE
358.43915426	121.63390263	1.89112244	SADDLE
179.43011138	302.75489191	3.60344113	MAXIMUM

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MOID Plots

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