Asteroids

2026SL help

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

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.662

Aphelion (Q)

1.680

Eccentricity (e)

0.435

Inclination (i)

12.8

deg

Orbit period (P)

462.8

Earth MOID

0.01616

U parameter

8.2

Next Earth close approach

Date

2026-09-21

Nominal distance (from Earth center)

0.01582

2367012

Maximum Brightness

19.4

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 Mt. Lemmon 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

1.170977

1-sigma variation

0.001067

Unit

Eccentricity (e)

Value

0.434913

1-sigma variation

0.000840

Unit

Inclination (i)

Value

12.7866

1-sigma variation

0.0278

Unit

Long. of Ascending Node (Ω)

Value

174.9385

1-sigma variation

0.0010

Unit

Arg. of Perihelion (ω)

Value

281.6581

1-sigma variation

0.0155

Unit

Mean Anomaly (M)

Value

26.08880

1-sigma variation

0.00551

Unit

Perihelion distance

Value

0.661704

1-sigma variation

Unit

Aphelion distance

Value

1.680250

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.121177

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.037086

1-sigma variation

Unit

MOID

Value

0.016163

1-sigma variation

Unit

Orbit Period

Value

462.8296

1-sigma variation

Unit

U parameter

Value

8.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.13934E-6	8.96966E-7	2.96232E-5	1.10411E-6	-1.65583E-5	5.88122E-6
e	8.96966E-7	7.06186E-7	2.33210E-5	8.69237E-7	-1.30327E-5	4.63103E-6
i	2.96232E-5	2.33210E-5	7.70262E-4	2.87083E-5	-4.30558E-4	1.52891E-4
Ω	1.10411E-6	8.69237E-7	2.87083E-5	1.07003E-6	-1.60455E-5	5.69932E-6
ω	-1.65583E-5	-1.30327E-5	-4.30558E-4	-1.60455E-5	2.40959E-4	-8.53855E-5
M	5.88122E-6	4.63103E-6	1.52891E-4	5.69932E-6	-8.53855E-5	3.03876E-5

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

26.56

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

Unit

Source

[1]

Unobserved

Value

0.6

Unit

Source

[1]

Normalized RMS of residuals

Value

0.615658

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-09-15.302278

Unit

Source

[2]

Last Observation

Value

2026-09-19.189322

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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 2026SL 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	1952-04-03 01:17	> 1 w	0.1024036	0.0612096	0.2312582
EARTH	1955-09-23 04:22	> 1 w	0.0352960	0.0135692	0.3023433
EARTH	1971-04-03 00:10	> 1 w	0.0914245	0.0613538	0.1886548
EARTH	1974-09-23 16:23	> 1 w	0.0488344	0.0139969	0.3575840
EARTH	1990-04-08 14:44	> 1 w	0.1861609	0.0649332	0.3456682
EARTH	1993-09-29 06:49	> 1 w	0.1770342	0.0093999	0.3404189
EARTH	2004-03-20 03:28	> 1 w	0.1315920	0.0662956	0.2047833
EARTH	2007-09-16 09:28	> 1 w	0.1246704	0.0133434	0.1874116
EARTH	2023-03-30 03:49	> 1 d	0.0607054	0.0606653	0.0010223
EARTH	2026-09-21 18:10	< 1 min	0.0158225	0.0157255	0.0000323
EARTH	2042-04-03 09:33	> 1 d	0.0953488	0.0625754	0.0936864
EARTH	2045-09-24 13:29	> 1 d	0.0663670	0.0159428	0.1452544
EARTH	2075-03-25 13:06	> 1 w	0.0925486	0.0641072	0.1320071
EARTH	2078-09-18 20:09	> 1 w	0.0740057	0.0164914	0.1902202
EARTH	2094-03-31 02:39	> 1 d	0.0643497	0.0626092	0.0149782
EARTH	2097-09-22 03:39	> 1 d	0.0185241	0.0177581	0.0121395
EARTH	2113-04-08 21:13	> 1 w	0.1650034	0.0674461	0.3503279
EARTH	2116-09-29 17:40	> 1 w	0.1644522	0.0146225	0.4609997

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
288.43477432	256.51230453	0.01616252	MINIMUM
66.61092422	84.99349986	0.06097873	MINIMUM
357.03828708	349.35222387	0.36739907	SADDLE
178.28705682	172.75642689	0.72393364	SADDLE
358.98357726	172.45717726	1.66697212	SADDLE
180.33008852	354.08318340	2.64886850	MAXIMUM

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MOID Plots

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