Asteroids

2026SA8 help

Last update: 2026-09-22 08:15 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.821

Aphelion (Q)

1.311

Eccentricity (e)

0.230

Inclination (i)

2.5

deg

Orbit period (P)

401.9

Earth MOID

0.00233

U parameter

7.9

Next Earth close approach

Date

2026-09-28

Nominal distance (from Earth center)

0.00254

379847

Maximum Brightness

18.3

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

28.6

mag

Diameter

5 - 11*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-09-20

Observatory

Pan-STARRS 1, 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

1.065889

1-sigma variation

0.000543

Unit

Eccentricity (e)

Value

0.229945

1-sigma variation

0.001011

Unit

Inclination (i)

Value

2.4901

1-sigma variation

0.0040

Unit

Long. of Ascending Node (Ω)

Value

8.0796

1-sigma variation

0.0099

Unit

Arg. of Perihelion (ω)

Value

84.7114

1-sigma variation

0.0097

Unit

Mean Anomaly (M)

Value

17.40468

1-sigma variation

0.04796

Unit

Perihelion distance

Value

0.820793

1-sigma variation

Unit

Aphelion distance

Value

1.310984

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.011419

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.033585

1-sigma variation

Unit

MOID

Value

0.002328

1-sigma variation

Unit

Orbit Period

Value

401.9446

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.95391E-7	5.49430E-7	2.05060E-6	3.67026E-6	-2.03431E-6	2.60383E-5
e	5.49430E-7	1.02312E-6	3.85607E-6	6.57885E-6	-3.47760E-6	4.85088E-5
i	2.05060E-6	3.85607E-6	1.57496E-5	1.65484E-5	-3.11805E-6	1.83536E-4
Ω	3.67026E-6	6.57885E-6	1.65484E-5	9.83058E-5	-9.02352E-5	3.07110E-4
ω	-2.03431E-6	-3.47760E-6	-3.11805E-6	-9.02352E-5	9.41543E-5	-1.59078E-4
M	2.60383E-5	4.85088E-5	1.83536E-4	3.07110E-4	-1.59078E-4	2.30036E-3

Date of computation: 2026-09-22 08:15 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

28.581

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

5 - 11*

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

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.371099

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-20.477201

Unit

Source

[2]

Last Observation

Value

2026-09-22.321147

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

11 (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 2026SA8 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	1956-09-21 02:15	> 1 mo	0.0572085	0.0050642	5.4106529
EARTH	1958-02-06 17:37	> 1 mo	0.1355093	0.0116515	2.6343933
EARTH	1958-04-08 06:09	> 1 mo	0.1539314	0.0206646	4.2966325
EARTH	1969-12-16 03:10	> 1 mo	0.1713570	0.0335981	0.2293244
EARTH	1981-10-13 00:04	> 1 mo	0.0989184	0.0104581	0.2160700
EARTH	1983-03-21 19:46	> 1 w	0.0079820	0.0053070	0.2042553
EARTH	1992-09-24 06:23	> 1 w	0.0534355	0.0030694	0.2020704
EARTH	1994-03-12 21:13	> 1 mo	0.0794516	0.0028790	0.2003818
EARTH	2004-12-23 02:02	> 1 mo	0.1687664	0.1619700	0.0022953
EARTH	2015-10-06 02:52	> 1 d	0.0733810	0.0059347	0.0335532
EARTH	2017-03-24 03:17	> 1 d	0.0501369	0.0049338	0.0495244
EARTH	2026-09-28 06:44	5.5	0.0025391	0.0025060	0.0000110
EARTH	2028-03-20 15:40	275.6	0.0105669	0.0063734	0.0022741
EARTH	2038-02-15 17:43	> 1 d	0.1191186	0.1142371	0.0016278
EARTH	2047-12-31 19:05	> 1 d	0.1638276	0.1608766	0.0009889
EARTH	2057-09-01 06:50	> 1 d	0.1873577	0.1783718	0.0029968
EARTH	2057-11-25 06:03	> 1 d	0.1482921	0.1436798	0.0015374
EARTH	2067-10-14 04:58	> 1 d	0.0867093	0.0768556	0.0032879
EARTH	2069-03-29 10:53	371.0	0.1739687	0.1547953	0.0063915
EARTH	2077-10-04 13:59	572.3	0.0456920	0.0423881	0.0011062
EARTH	2079-03-28 02:32	317.4	0.1468247	0.1310615	0.0052549
EARTH	2087-10-25 17:24	> 1 d	0.1057117	0.0964907	0.0030738
EARTH	2097-12-06 03:10	> 1 d	0.1563900	0.1510698	0.0017754
EARTH	2108-01-11 01:26	> 1 d	0.1582208	0.1561482	0.0006910
EARTH	2118-02-16 23:35	> 1 d	0.1167330	0.1070999	0.0032164
EARTH	2126-09-23 17:13	150.8	0.1410815	0.1183180	0.0075891

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
285.44579017	262.95853168	0.00232761	MINIMUM
73.55590314	75.70253815	0.00651571	MINIMUM
359.42295039	349.30228058	0.16735424	SADDLE
179.60604763	169.38835356	0.30045161	SADDLE
359.11393793	168.92509842	1.83507363	SADDLE
179.44273775	349.26151885	2.29401785	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2026SA8

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2057-09-30.381	72636.381	-1.908	0.57 ± 0.144	2.03E5	1.23E-6	8.34E-3	-7.56
2058-09-29.903	73000.903	-2.021	1.78 ± 0.165	6.43E5	2.87E-7	8.33E-3	-8.20
2088-03-27.139	83772.139	-3.231	1.18 ± 0.071	5.35E5	1.60E-8	8.19E-3	-9.73
2088-03-27.142	83772.142	-3.248	0.08 ± 1.749	1.88E7	2.72E-10	8.20E-3	-11.50
2092-09-29.205	85419.205	-2.023	0.18 ± 0.506	5.92E7	3.37E-9	8.34E-3	-10.44
2094-09-30.425	86150.425	-1.556	0.56 ± 0.934	1.56E7	2.60E-8	8.40E-3	-9.56
2095-09-30.683	86515.683	-1.928	0.06 ± 0.716	1.59E8	1.46E-9	8.34E-3	-10.82
2099-09-30.393	87976.393	-1.598	1.39 ± 0.000	3.08E7	1.39E-8	8.40E-3	-9.86
2120-09-30.844	95646.844	-1.805	1.53 ± 0.024	1.32E6	1.57E-7	8.34E-3	-8.92
2124-09-30.131	97107.131	-2.028	0.55 ± 0.268	1.19E7	1.67E-8	8.34E-3	-9.91


Based on 11 optical observations (of which 0 are rejected as outliers) from 2026/09/20.477 to 2026/09/22.321.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.02 and 2.02 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260922 100849.141 UTC.

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