Asteroids

2026SA12 help

Last update: 2026-09-23 13:01 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

1.008

Aphelion (Q)

2.129

Eccentricity (e)

0.357

Inclination (i)

9.7

deg

Orbit period (P)

717.4

Earth MOID

0.00617

U parameter

7.2

Next Earth close approach

Date

2028-08-18

Nominal distance (from Earth center)

0.19606

29329448

Maximum Brightness

27.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.9

mag

Diameter

7 - 16*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-22

Observatory

Palomar Mountain--ZTF

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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.568280

1-sigma variation

0.000531

Unit

Eccentricity (e)

Value

0.357286

1-sigma variation

0.000216

Unit

Inclination (i)

Value

9.6763

1-sigma variation

0.0041

Unit

Long. of Ascending Node (Ω)

Value

358.7125

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

5.0412

1-sigma variation

0.0023

Unit

Mean Anomaly (M)

Value

45.46061

1-sigma variation

0.02228

Unit

Perihelion distance

Value

1.007955

1-sigma variation

Unit

Aphelion distance

Value

2.128605

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.006185

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.129010

1-sigma variation

Unit

MOID

Value

0.006175

1-sigma variation

Unit

Orbit Period

Value

717.3548

1-sigma variation

Unit

U parameter

Value

7.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.81868E-7	1.14627E-7	2.19010E-6	5.71274E-8	-8.18887E-7	-1.18210E-5
e	1.14627E-7	4.66157E-8	8.90685E-7	2.32307E-8	-3.32520E-7	-4.80748E-6
i	2.19010E-6	8.90685E-7	1.70414E-5	4.43590E-7	-6.12600E-6	-9.19527E-5
Ω	5.71274E-8	2.32307E-8	4.43590E-7	1.16282E-8	-1.73916E-7	-2.39234E-6
ω	-8.18887E-7	-3.32520E-7	-6.12600E-6	-1.73916E-7	5.42255E-6	3.30053E-5
M	-1.18210E-5	-4.80748E-6	-9.19527E-5	-2.39234E-6	3.30053E-5	4.96340E-4

Date of computation: 2026-09-23 13:01 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

27.888

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

7 - 16*

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

0.9

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.840457

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-22.296763

Unit

Source

[2]

Last Observation

Value

2026-09-23.181522

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (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 2026SA12 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	1953-10-20 11:31	> 1 mo	0.1497866	0.0401314	0.9264815
EARTH	1955-10-04 23:17	> 1 mo	0.0539647	0.0058343	0.4264257
EARTH	1957-09-18 21:58	> 1 mo	0.0131577	0.0039641	0.1255943
EARTH	1959-08-23 12:33	> 1 w	0.1549077	0.0437917	0.1560968
EARTH	2024-10-19 09:18	934.6	0.1403016	0.1234089	0.0056653
EARTH	2026-09-21 19:47	< 1 min	0.0052276	0.0052196	0.0000027
EARTH	2028-08-18 19:18	692.7	0.1960553	0.1786872	0.0058125
EARTH	2077-10-24 21:28	> 1 w	0.1752008	0.0530544	0.1381836
EARTH	2079-09-18 02:53	> 1 w	0.0188226	0.0036497	0.1154436
EARTH	2120-10-18 16:32	> 1 mo	0.1240758	0.0362016	5.9019146
EARTH	2122-08-31 23:25	> 1 mo	0.1105814	0.0259999	5.6297563

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
356.58610718	256.71270927	0.00617463	MINIMUM
179.21418434	79.77202461	1.13245208	SADDLE
357.80232120	78.45440378	2.00409263	SADDLE
178.81633875	259.50002705	3.13028242	MAXIMUM

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MOID Plots

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