Asteroids

2026UG4 help

Last update: 2026-11-09 13:31 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.971

Aphelion (Q)

1.607

Eccentricity (e)

0.247

Inclination (i)

10.8

deg

Orbit period (P)

534.5

Earth MOID

0.01663

U parameter

6.6

Next Earth close approach

Date

2045-11-28

Nominal distance (from Earth center)

0.12248

18323018

Maximum Brightness

23.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.1

mag

Diameter

26 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-10-26

Observatory

Pan-STARRS 2, Haleakala

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

1.289014

1-sigma variation

0.000138

Unit

Eccentricity (e)

Value

0.246731

1-sigma variation

0.000082

Unit

Inclination (i)

Value

10.8413

1-sigma variation

0.0030

Unit

Long. of Ascending Node (Ω)

Value

222.8150

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

216.5182

1-sigma variation

0.0017

Unit

Mean Anomaly (M)

Value

11.69421

1-sigma variation

0.00020

Unit

Perihelion distance

Value

0.970974

1-sigma variation

Unit

Aphelion distance

Value

1.607053

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.503225

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.019114

1-sigma variation

Unit

MOID

Value

0.016626

1-sigma variation

Unit

Orbit Period

Value

534.5456

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.91269E-8	1.13508E-8	4.16200E-7	-1.05079E-8	-2.40330E-7	-2.68137E-8
e	1.13508E-8	6.73616E-9	2.46993E-7	-6.23576E-9	-1.42617E-7	-1.59159E-8
i	4.16200E-7	2.46993E-7	9.05680E-6	-2.28675E-7	-5.22948E-6	-5.83537E-7
Ω	-1.05079E-8	-6.23576E-9	-2.28675E-7	5.78052E-9	1.32073E-7	1.47087E-8
ω	-2.40330E-7	-1.42617E-7	-5.22948E-6	1.32073E-7	3.02299E-6	3.35157E-7
M	-2.68137E-8	-1.59159E-8	-5.83537E-7	1.47087E-8	3.35157E-7	3.85483E-8

Date of computation: 2026-11-09 13:31 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

25.05

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

26 - 60*

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

0.52557

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-26.408248

Unit

Source

[2]

Last Observation

Value

2026-11-08.481347

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

113 (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

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 2026UG4 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	1956-11-06 15:01	> 1 w	0.0170059	0.0155376	0.0685625
EARTH	1972-11-10 06:45	> 1 w	0.0291943	0.0146487	0.0612718
MARS	1974-12-10 17:43	> 1 d	0.0479276	0.0342216	0.0353057
EARTH	2007-11-12 15:32	> 1 d	0.0399554	0.0134368	0.0168528
EARTH	2026-11-08 13:48	< 1 s	0.0171301	0.0171148	0.0000051
EARTH	2045-11-28 03:27	> 1 d	0.1224818	0.0723539	0.0169674
EARTH	2067-10-28 05:12	> 1 d	0.1265077	0.0509616	0.0252114
EARTH	2086-11-09 14:34	747.6	0.0216018	0.0166393	0.0027410
EARTH	2108-11-09 06:32	> 1 d	0.0180947	0.0169854	0.0045087

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
333.21824589	303.02898349	0.01662609	MINIMUM
186.00889524	160.34494271	0.61206682	SADDLE
0.52399001	156.93065066	1.98144739	SADDLE
177.61525685	333.79621166	2.58816732	MAXIMUM

Download:

MOID Plots

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