Asteroids

2026AC help

Last update: 2026-01-21 12:46 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.778

Aphelion (Q)

1.286

Eccentricity (e)

0.246

Inclination (i)

9.9

deg

Orbit period (P)

382.8

Earth MOID

0.02093

U parameter

6.8

Next Earth close approach

Date

2043-06-22

Nominal distance (from Earth center)

0.10617

15883551

Maximum Brightness

22.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.7

mag

Diameter

50 - 110*

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.031710

1-sigma variation

0.000105

Unit

Eccentricity (e)

Value

0.246362

1-sigma variation

0.000171

Unit

Inclination (i)

Value

9.8649

1-sigma variation

0.0073

Unit

Long. of Ascending Node (Ω)

Value

291.3633

1-sigma variation

0.0014

Unit

Arg. of Perihelion (ω)

Value

78.0064

1-sigma variation

0.0051

Unit

Mean Anomaly (M)

Value

22.92291

1-sigma variation

0.01758

Unit

Perihelion distance

Value

0.777536

1-sigma variation

Unit

Aphelion distance

Value

1.285885

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.096051

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.037652

1-sigma variation

Unit

MOID

Value

0.020932

1-sigma variation

Unit

Orbit Period

Value

382.7675

1-sigma variation

Unit

U parameter

Value

6.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.09834E-8	1.79691E-8	7.65582E-7	-1.42459E-7	5.37729E-7	-1.84291E-6
e	1.79691E-8	2.94019E-8	1.25263E-6	-2.33094E-7	8.79331E-7	-3.01510E-6
i	7.65582E-7	1.25263E-6	5.33677E-5	-9.93080E-6	3.74691E-5	-1.28459E-4
Ω	-1.42459E-7	-2.33094E-7	-9.93080E-6	1.84797E-6	-6.97173E-6	2.39036E-5
ω	5.37729E-7	8.79331E-7	3.74691E-5	-6.97173E-6	2.63665E-5	-9.02187E-5
M	-1.84291E-6	-3.01510E-6	-1.28459E-4	2.39036E-5	-9.02187E-5	3.09223E-4

Date of computation: 2026-01-21 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

23.746

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 - 110*

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

0.485008

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

2026-01-20.845311

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

168 (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

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	1957-06-21 08:37	> 1 d	0.1051124	0.0580217	0.0263249
EARTH	1958-08-05 20:09	> 1 w	0.1931501	0.1426085	0.0204662
EARTH	1961-01-04 23:42	527.3	0.0498959	0.0221485	0.0350546
EARTH	1979-06-28 05:52	> 1 d	0.0570949	0.0570293	0.0006443
EARTH	1983-01-07 03:32	606.1	0.0388959	0.0218805	0.0120876
EARTH	2000-06-21 15:10	> 1 d	0.1014575	0.0599138	0.0179386
EARTH	2001-08-07 04:28	> 1 w	0.1963102	0.1595874	0.0136482
EARTH	2004-01-05 23:04	501.0	0.0427292	0.0214186	0.0233427
EARTH	2022-06-27 20:10	283.3	0.0562409	0.0562130	0.0000758
EARTH	2026-01-06 20:36	< 1 min	0.0323935	0.0323247	0.0000229
EARTH	2043-06-22 07:18	1372.4	0.1061750	0.0693993	0.0140409
EARTH	2044-08-05 13:37	> 1 d	0.1928147	0.1635506	0.0104652
EARTH	2047-01-05 19:51	326.9	0.0444700	0.0205503	0.0154972
EARTH	2065-06-27 21:47	1279.5	0.0551321	0.0550829	0.0004367
EARTH	2069-01-06 20:12	765.6	0.0333351	0.0199753	0.0163228
EARTH	2086-06-22 22:03	874.1	0.0978704	0.0711866	0.0099618
EARTH	2087-08-08 19:11	> 1 d	0.1981943	0.1788934	0.0066605
EARTH	2090-01-05 21:34	168.2	0.0350739	0.0202326	0.0074321
EARTH	2108-06-27 16:50	> 1 d	0.0567279	0.0540963	0.0068865
EARTH	2112-01-08 05:53	1285.0	0.0199538	0.0191084	0.0101097

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
81.74580908	4.19574463	0.02093222	MINIMUM
280.44592271	174.28185791	0.05718172	MINIMUM
0.50255176	269.83850681	0.26838722	SADDLE
181.42196100	88.22808604	0.34379453	SADDLE
356.01697395	83.98334825	1.77093763	SADDLE
176.19987274	264.11364386	2.27990828	MAXIMUM

Download:

MOID Plots

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