Asteroids

2026AS1 help

Last update: 2026-01-19 12:46 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.939

Aphelion (Q)

2.090

Eccentricity (e)

0.380

Inclination (i)

1.2

deg

Orbit period (P)

680.6

Earth MOID

0.00395

U parameter

7.4

Next Earth close approach

Date

2039-03-11

Nominal distance (from Earth center)

0.04463

6676494

Maximum Brightness

28.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.3

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-01-11

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.514205

1-sigma variation

0.000640

Unit

Eccentricity (e)

Value

0.380060

1-sigma variation

0.000282

Unit

Inclination (i)

Value

1.2290

1-sigma variation

0.0008

Unit

Long. of Ascending Node (Ω)

Value

201.8354

1-sigma variation

0.0073

Unit

Arg. of Perihelion (ω)

Value

310.2422

1-sigma variation

0.0047

Unit

Mean Anomaly (M)

Value

314.47788

1-sigma variation

0.02966

Unit

Perihelion distance

Value

0.938716

1-sigma variation

Unit

Aphelion distance

Value

2.089694

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.036678

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.718835

1-sigma variation

Unit

MOID

Value

0.003945

1-sigma variation

Unit

Orbit Period

Value

680.5742

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.09717E-7	1.80803E-7	5.39632E-7	4.60402E-6	-2.95154E-6	1.89864E-5
e	1.80803E-7	7.97861E-8	2.38133E-7	2.03168E-6	-1.30245E-6	8.37844E-6
i	5.39632E-7	2.38133E-7	7.10743E-7	6.06493E-6	-3.88843E-6	2.50066E-5
Ω	4.60402E-6	2.03168E-6	6.06493E-6	5.26885E-5	-3.41260E-5	2.13353E-4
ω	-2.95154E-6	-1.30245E-6	-3.88843E-6	-3.41260E-5	2.22311E-5	-1.36778E-4
M	1.89864E-5	8.37844E-6	2.50066E-5	2.13353E-4	-1.36778E-4	8.79831E-4

Date of computation: 2026-01-19 12:46 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

26.271

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

15 - 30*

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

0.806513

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-01-07.333658

Unit

Source

[2]

Last Observation

Value

2026-01-18.5717

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

22 (1)

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

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2026AS1 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	1957-04-20 08:09	> 1 d	0.1733392	0.0021454	0.1069294
EARTH	1972-01-08 20:31	> 1 d	0.0648172	0.0204757	0.0259742
EARTH	1985-03-16 00:54	> 1 mo	0.0382079	0.0017611	0.0434431
EARTH	1998-04-11 11:37	> 1 w	0.0643486	0.0033054	0.0918820
EARTH	2026-01-18 14:25	< 1 min	0.0209663	0.0209219	0.0000148
EARTH	2039-03-11 16:32	> 1 w	0.0446296	0.0026981	0.0189219
EARTH	2052-04-05 01:58	> 1 d	0.0208560	0.0036896	0.0060142
EARTH	2067-01-10 06:35	> 1 w	0.0614401	0.0213309	0.1598623
EARTH	2080-04-13 17:58	> 1 d	0.0824399	0.0002277	0.0477073
EARTH	2095-01-15 15:49	> 1 mo	0.0317397	0.0210438	0.1528781
EARTH	2108-03-31 10:50	> 1 w	0.0076339	0.0023651	0.0646785

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
26.92118667	89.08096641	0.00393642	MINIMUM
337.17334668	16.96157504	0.02091577	MINIMUM
1.40162996	52.03989104	0.05353022	SADDLE
180.88779496	231.74543758	1.07760982	SADDLE
2.05940019	232.99273206	1.95012033	SADDLE
180.90853097	51.75138224	3.07879207	MAXIMUM

Download:

MOID Plots

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