Asteroids

2026SK help

Last update: 2026-09-19 13:15 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.748

Aphelion (Q)

1.420

Eccentricity (e)

0.310

Inclination (i)

26.9

deg

Orbit period (P)

412.3

Earth MOID

0.01123

U parameter

7.9

Next Earth close approach

Date

2028-03-13

Nominal distance (from Earth center)

0.09545

14279164

Maximum Brightness

25.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

13 - 29*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-18

Observatory

University of Arizona Catalina Sky 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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.084160

1-sigma variation

0.000598

Unit

Eccentricity (e)

Value

0.310097

1-sigma variation

0.000404

Unit

Inclination (i)

Value

26.8836

1-sigma variation

0.0360

Unit

Long. of Ascending Node (Ω)

Value

355.4287

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

96.7973

1-sigma variation

0.0552

Unit

Mean Anomaly (M)

Value

24.60163

1-sigma variation

0.02636

Unit

Perihelion distance

Value

0.747966

1-sigma variation

Unit

Aphelion distance

Value

1.420354

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.013588

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.048947

1-sigma variation

Unit

MOID

Value

0.011228

1-sigma variation

Unit

Orbit Period

Value

412.3239

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.58085E-7	2.41877E-7	2.15382E-5	-7.80013E-8	-3.30195E-5	1.57711E-5
e	2.41877E-7	1.63397E-7	1.45473E-5	-5.26807E-8	-2.23024E-5	1.06534E-5
i	2.15382E-5	1.45473E-5	1.29606E-3	-4.69444E-6	-1.98614E-3	9.48535E-4
Ω	-7.80013E-8	-5.26807E-8	-4.69444E-6	1.70056E-8	7.19307E-6	-3.43503E-6
ω	-3.30195E-5	-2.23024E-5	-1.98614E-3	7.19307E-6	3.04490E-3	-1.45424E-3
M	1.57711E-5	1.06534E-5	9.48535E-4	-3.43503E-6	-1.45424E-3	6.94624E-4

Date of computation: 2026-09-19 13:15 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

26.551

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

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

[-]

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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

0.8

Unit

Source

[1]

Unobserved

Value

0.9

Unit

Source

[1]

Normalized RMS of residuals

Value

0.710791

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-18.259454

Unit

Source

[2]

Last Observation

Value

2026-09-19.106572

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

35 (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 2026SK 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	1973-09-16 01:23	> 1 d	0.0827547	0.0091578	0.1183584
EARTH	1975-03-09 10:37	> 1 d	0.1860432	0.0611027	0.0812803
EARTH	1982-09-20 04:36	> 1 d	0.0288943	0.0096942	0.1291347
EARTH	1984-03-15 01:50	> 1 w	0.0757251	0.0428375	0.1200398
EARTH	1991-09-24 11:26	> 1 d	0.1739540	0.0093483	0.1443301
EARTH	1993-03-22 18:10	> 1 w	0.0928225	0.0432546	0.1303841
EARTH	2017-09-14 08:39	> 1 d	0.1291458	0.0085597	0.0453787
EARTH	2026-09-19 12:02	< 1 min	0.0110423	0.0109976	0.0000149
EARTH	2028-03-13 23:45	408.3	0.0954503	0.0797183	0.0053414
EARTH	2035-09-24 12:53	1152.7	0.1740736	0.0391717	0.0452214
EARTH	2037-03-22 23:17	> 1 d	0.0946072	0.0443562	0.0455994
EARTH	2061-09-18 00:31	> 1 d	0.0356430	0.0107379	0.1487572
EARTH	2063-03-12 10:04	> 1 d	0.1372608	0.0528915	0.1204944
EARTH	2070-09-22 16:56	819.4	0.1048375	0.0446645	0.0201454
EARTH	2072-03-19 04:05	> 1 d	0.0446759	0.0438935	0.0097066
EARTH	2081-03-28 07:07	> 1 w	0.1931762	0.0528820	0.2586178
EARTH	2096-09-14 12:32	> 1 w	0.1246078	0.0100030	0.5442013
EARTH	2105-09-22 02:29	> 1 w	0.0561088	0.0113241	0.5652224
EARTH	2107-03-18 19:05	> 1 w	0.0528960	0.0433493	0.3166455
EARTH	2116-03-27 23:07	> 1 w	0.1707648	0.0478101	0.3469861

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
282.25769729	254.03803827	0.01122840	MINIMUM
68.22435632	74.10809999	0.04166601	MINIMUM
355.30206190	343.22664601	0.46317577	SADDLE
175.16885438	165.98599093	0.68843174	SADDLE
357.53670109	166.60823750	1.71580251	SADDLE
182.17501905	351.74617643	2.34136700	MAXIMUM

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MOID Plots

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