Asteroids

2026AC1 help

Last update: 2026-01-22 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.795

Aphelion (Q)

3.463

Eccentricity (e)

0.627

Inclination (i)

10.2

deg

Orbit period (P)

1134.9

Earth MOID

0.00611

U parameter

7.9

Next Earth close approach

Date

2047-09-01

Nominal distance (from Earth center)

0.15403

23042263

Maximum Brightness

22.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.6

mag

Diameter

50 - 120*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-01-09

Observatory

Palomar Mountain--ZTF

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

2.129263

1-sigma variation

0.002628

Unit

Eccentricity (e)

Value

0.626559

1-sigma variation

0.000502

Unit

Inclination (i)

Value

10.1856

1-sigma variation

0.0063

Unit

Long. of Ascending Node (Ω)

Value

109.1028

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

297.9668

1-sigma variation

0.0008

Unit

Mean Anomaly (M)

Value

357.07434

1-sigma variation

0.00223

Unit

Perihelion distance

Value

0.795154

1-sigma variation

Unit

Aphelion distance

Value

3.463371

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.015824

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.813925

1-sigma variation

Unit

MOID

Value

0.006109

1-sigma variation

Unit

Orbit Period

Value

1134.8600

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.90416E-6	1.31815E-6	1.65575E-5	-1.17285E-6	2.13023E-6	5.84672E-6
e	1.31815E-6	2.51664E-7	3.16118E-6	-2.23923E-7	4.06698E-7	1.11627E-6
i	1.65575E-5	3.16118E-6	3.97080E-5	-2.81269E-6	5.10842E-6	1.40215E-5
Ω	-1.17285E-6	-2.23923E-7	-2.81269E-6	1.99263E-7	-3.61875E-7	-9.93221E-7
ω	2.13023E-6	4.06698E-7	5.10842E-6	-3.61875E-7	6.59844E-7	1.80366E-6
M	5.84672E-6	1.11627E-6	1.40215E-5	-9.93221E-7	1.80366E-6	4.95127E-6

Date of computation: 2026-01-22 13:00 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

23.552

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 - 120*

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

0.358437

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-01-09.170093

Unit

Source

[2]

Last Observation

Value

2026-01-21.296945

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

88 (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

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 2026AC1 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	1970-01-19 02:14	> 1 w	0.1739054	0.0061629	0.2036949
EARTH	1994-09-15 00:43	> 1 mo	0.1750420	0.1402298	0.1381629
EARTH	1998-01-11 17:06	> 1 w	0.0659568	0.0113398	0.3179090
EARTH	2022-09-09 04:07	> 1 d	0.1572322	0.1435309	0.0136018
EARTH	2026-01-08 23:18	< 1 s	0.0146488	0.0146182	0.0000102
EARTH	2047-09-01 18:36	> 1 w	0.1540280	0.1484791	0.0644533
EARTH	2051-01-11 00:43	> 1 w	0.0487811	0.0068597	0.2778144
EARTH	2119-09-01 01:41	> 1 mo	0.1731556	0.1544991	1.5290371
EARTH	2123-01-11 10:46	> 1 mo	0.0345297	0.0009324	3.8675671

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
31.02628338	5.85874028	0.00610903	MINIMUM
325.17368496	239.74704491	0.14396998	MINIMUM
354.84086422	296.40170956	0.24483464	SADDLE
358.20128929	123.42211159	1.80012866	SADDLE
179.33088472	125.58558604	2.46997101	SADDLE
179.92194838	305.87697923	4.44449100	MAXIMUM

Download:

MOID Plots

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