Asteroids

2026SB12 help

Last update: 2026-10-03 13:45 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.989

Aphelion (Q)

1.461

Eccentricity (e)

0.193

Inclination (i)

18.2

deg

Orbit period (P)

495.4

Earth MOID

0.02690

U parameter

7.4

Next Earth close approach

Date

2045-09-27

Nominal distance (from Earth center)

0.05911

8843083

Maximum Brightness

21.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.4

mag

Diameter

22 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-22

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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.225360

1-sigma variation

0.000404

Unit

Eccentricity (e)

Value

0.192570

1-sigma variation

0.000250

Unit

Inclination (i)

Value

18.2491

1-sigma variation

0.0151

Unit

Long. of Ascending Node (Ω)

Value

185.6433

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

220.3970

1-sigma variation

0.0212

Unit

Mean Anomaly (M)

Value

36.32648

1-sigma variation

0.00154

Unit

Perihelion distance

Value

0.989392

1-sigma variation

Unit

Aphelion distance

Value

1.461328

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.385854

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.028086

1-sigma variation

Unit

MOID

Value

0.026898

1-sigma variation

Unit

Orbit Period

Value

495.4432

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.63579E-7	1.01298E-7	6.11931E-6	3.89480E-8	-8.56686E-6	-6.22462E-7
e	1.01298E-7	6.27304E-8	3.78947E-6	2.41199E-8	-5.30507E-6	-3.85509E-7
i	6.11931E-6	3.78947E-6	2.28918E-4	1.45700E-6	-3.20476E-4	-2.32864E-5
Ω	3.89480E-8	2.41199E-8	1.45700E-6	9.28444E-9	-2.03939E-6	-1.48441E-7
ω	-8.56686E-6	-5.30507E-6	-3.20476E-4	-2.03939E-6	4.48693E-4	3.25786E-5
M	-6.22462E-7	-3.85509E-7	-2.32864E-5	-1.48441E-7	3.25786E-5	2.38124E-6

Date of computation: 2026-10-03 13:45 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

25.415

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

22 - 50*

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

0.569541

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-22.298818

Unit

Source

[2]

Last Observation

Value

2026-10-01.315999

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

54 (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 2026SB12 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	1965-09-28 10:25	955.8	0.0408430	0.0249654	0.0105512
EARTH	2007-10-02 08:50	> 1 d	0.0434567	0.0252254	0.0467701
EARTH	2026-09-30 09:18	< 1 min	0.0259687	0.0258995	0.0000231
EARTH	2045-09-27 13:30	> 1 d	0.0591124	0.0249186	0.0522122
EARTH	2068-10-09 19:02	723.1	0.1969148	0.1542188	0.0142355
EARTH	2087-10-02 19:07	> 1 d	0.0487088	0.0254974	0.0253398
EARTH	2106-10-01 21:48	> 1 d	0.0273073	0.0263616	0.0093923
EARTH	2125-10-03 01:32	> 1 w	0.0436726	0.0260031	0.2925274

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
327.49563275	264.87807838	0.02689751	MINIMUM
89.69549265	44.79076799	0.32064609	MINIMUM
54.04527724	7.26543801	0.33427278	SADDLE
206.15320237	143.08459437	0.54252955	SADDLE
3.73326699	126.90407059	1.98597820	SADDLE
171.71680208	294.34622385	2.44236860	MAXIMUM

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MOID Plots

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