Asteroids

2026AC help

Last update: 2026-03-18 10:55 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.778

Aphelion (Q)

1.287

Eccentricity (e)

0.246

Inclination (i)

9.9

deg

Orbit period (P)

383.4

Earth MOID

0.02099

U parameter

5.6

Next Earth close approach

Date

2043-06-22

Nominal distance (from Earth center)

0.09704

14516262

Maximum Brightness

22.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.8

mag

Diameter

50 - 100*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-01-07

Observatory

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.032890

1-sigma variation

0.000017

Unit

Eccentricity (e)

Value

0.246401

1-sigma variation

0.000028

Unit

Inclination (i)

Value

9.8838

1-sigma variation

0.0012

Unit

Long. of Ascending Node (Ω)

Value

291.3334

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

78.2661

1-sigma variation

0.0008

Unit

Mean Anomaly (M)

Value

210.55849

1-sigma variation

0.00764

Unit

Perihelion distance

Value

0.778384

1-sigma variation

Unit

Aphelion distance

Value

1.287395

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.092879

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.037791

1-sigma variation

Unit

MOID

Value

0.020987

1-sigma variation

Unit

Orbit Period

Value

383.4241

1-sigma variation

Unit

U parameter

Value

5.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.03167E-10	4.92621E-10	2.08135E-8	-3.66666E-9	1.45444E-8	-1.33077E-7
e	4.92621E-10	8.01018E-10	3.38385E-8	-5.96283E-9	2.35800E-8	-2.16248E-7
i	2.08135E-8	3.38385E-8	1.42964E-6	-2.51914E-7	9.96736E-7	-9.13649E-6
Ω	-3.66666E-9	-5.96283E-9	-2.51914E-7	4.44091E-8	-1.75462E-7	1.60959E-6
ω	1.45444E-8	2.35800E-8	9.96736E-7	-1.75462E-7	7.03002E-7	-6.38345E-6
M	-1.33077E-7	-2.16248E-7	-9.13649E-6	1.60959E-6	-6.38345E-6	5.84151E-5

Date of computation: 2026-03-18 10:55 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

23.765

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

50 - 100*

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

0.483736

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-01-07.06017

Unit

Source

[2]

Last Observation

Value

2026-02-04.265951

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

181 (2)

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

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 2026AC 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	1957-06-22 23:30	887.0	0.0850552	0.0656339	0.0077266
EARTH	1961-01-05 09:03	190.5	0.0289068	0.0220623	0.0044364
EARTH	1979-06-28 22:54	193.4	0.0580734	0.0573412	0.0003075
EARTH	1983-01-07 09:13	49.0	0.0457018	0.0427835	0.0009830
EARTH	2000-06-20 17:12	317.3	0.1136800	0.1039820	0.0032862
EARTH	2001-08-03 01:48	> 1 d	0.1869260	0.1794402	0.0025335
EARTH	2004-01-05 19:14	27.8	0.0588280	0.0464225	0.0042256
EARTH	2022-06-27 17:04	47.4	0.0563165	0.0562566	0.0000250
EARTH	2026-01-06 20:36	< 1 s	0.0324088	0.0323974	0.0000038
EARTH	2043-06-22 23:37	239.4	0.0970352	0.0903267	0.0022804
EARTH	2044-08-08 12:33	> 1 d	0.1995668	0.1945993	0.0016723
EARTH	2047-01-06 00:08	73.9	0.0346302	0.0280012	0.0023736
EARTH	2065-06-27 10:21	44.2	0.0556741	0.0554851	0.0000670
EARTH	2069-01-06 13:17	38.5	0.0251921	0.0232773	0.0006896
EARTH	2086-06-21 11:01	526.5	0.1192692	0.1018670	0.0059482
EARTH	2087-08-01 21:59	> 1 d	0.1824210	0.1689730	0.0045969
EARTH	2090-01-05 14:34	64.6	0.0574569	0.0379809	0.0067354
EARTH	2108-06-29 18:19	372.9	0.0544804	0.0540535	0.0003637
EARTH	2112-01-09 10:34	248.5	0.0529182	0.0368115	0.0055560

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
81.47487026	1.11050930	0.02098687	MINIMUM
280.77108730	171.69332328	0.05518962	MINIMUM
0.57788290	267.01992861	0.26811712	SADDLE
181.41091723	85.38494246	0.34657851	SADDLE
356.21645283	81.31824471	1.77031773	SADDLE
176.34742155	261.39647469	2.28145804	MAXIMUM

Download:

MOID Plots

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