Asteroids

2026UA help

Last update: 2026-10-17 13:15 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.771

Aphelion (Q)

1.930

Eccentricity (e)

0.429

Inclination (i)

20.9

deg

Orbit period (P)

573.2

Earth MOID

0.00673

U parameter

8.0

Next Earth close approach

Date

2034-04-26

Nominal distance (from Earth center)

0.12826

19187881

Maximum Brightness

24.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.5

mag

Diameter

13 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-10-16

Observatory

University of Arizona Catalina Sky 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

1.350368

1-sigma variation

0.001171

Unit

Eccentricity (e)

Value

0.429133

1-sigma variation

0.000582

Unit

Inclination (i)

Value

20.8564

1-sigma variation

0.0218

Unit

Long. of Ascending Node (Ω)

Value

201.8012

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

102.7361

1-sigma variation

0.0193

Unit

Mean Anomaly (M)

Value

78.45508

1-sigma variation

0.12115

Unit

Perihelion distance

Value

0.770881

1-sigma variation

Unit

Aphelion distance

Value

1.929855

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.215380

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.010083

1-sigma variation

Unit

MOID

Value

0.006727

1-sigma variation

Unit

Orbit Period

Value

573.1610

1-sigma variation

Unit

U parameter

Value

8.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.37097E-6	6.81382E-7	2.55400E-5	-5.05066E-7	2.23196E-5	-1.41853E-4
e	6.81382E-7	3.38913E-7	1.27032E-5	-2.50744E-7	1.10444E-5	-7.04955E-5
i	2.55400E-5	1.27032E-5	4.76191E-4	-9.39902E-6	4.14013E-4	-2.64236E-3
Ω	-5.05066E-7	-2.50744E-7	-9.39902E-6	1.86439E-7	-8.27421E-6	5.22660E-5
ω	2.23196E-5	1.10444E-5	4.14013E-4	-8.27421E-6	3.72412E-4	-2.31065E-3
M	-1.41853E-4	-7.04955E-5	-2.64236E-3	5.22660E-5	-2.31065E-3	1.46777E-2

Date of computation: 2026-10-17 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

26.507

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 - 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

[-]

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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

0.7

Unit

Source

[1]

Normalized RMS of residuals

Value

0.926037

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-16.18661

Unit

Source

[2]

Last Observation

Value

2026-10-17.249874

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

17 (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 2026UA 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	1965-10-17 20:49	> 1 w	0.0710467	0.0076088	0.2811686
EARTH	1973-04-22 05:34	> 1 w	0.1716503	0.1175300	0.1972191
EARTH	1998-04-27 07:27	> 1 d	0.1216781	0.1194649	0.0373260
EARTH	2001-10-09 06:15	> 1 w	0.0966880	0.0041683	0.1984661
EARTH	2023-04-29 23:12	471.3	0.1767869	0.1332247	0.0179678
EARTH	2026-10-15 03:48	< 1 min	0.0089732	0.0089428	0.0000101
EARTH	2034-04-26 02:58	> 1 d	0.1282631	0.1237204	0.0164661
EARTH	2037-10-10 01:17	> 1 d	0.0841558	0.0036198	0.0913687
EARTH	2045-04-21 23:08	> 1 d	0.1947827	0.1223251	0.1013700
EARTH	2084-10-23 18:21	> 1 w	0.1894722	0.0020277	0.2312454
EARTH	2092-04-29 10:34	> 1 d	0.1697699	0.1254106	0.1475559
EARTH	2095-10-18 05:50	> 1 w	0.0588231	0.0034545	0.2169191
EARTH	2103-04-29 11:57	> 1 d	0.1299476	0.1273260	0.0120408
EARTH	2106-10-15 11:30	331.9	0.0112610	0.0036857	0.0042733

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
52.94308821	278.99451367	0.00672687	MINIMUM
298.04431823	112.76186428	0.12378194	MINIMUM
353.90034680	192.43048845	0.40052124	SADDLE
176.79675958	20.11286480	1.06410345	SADDLE
357.67498417	18.92316852	1.72766213	SADDLE
180.87602266	202.82742333	2.90204267	MAXIMUM

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MOID Plots

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