Asteroids

2026UG1 help

Last update: 2026-10-27 13:17 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.663

Aphelion (Q)

1.795

Eccentricity (e)

0.461

Inclination (i)

6.2

deg

Orbit period (P)

497.5

Earth MOID

0.00229

U parameter

8.1

Next Earth close approach

Date

2033-04-18

Nominal distance (from Earth center)

0.14918

22317634

Maximum Brightness

25.7

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

13 - 28*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-10-22

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

1.228737

1-sigma variation

0.001111

Unit

Eccentricity (e)

Value

0.460616

1-sigma variation

0.000808

Unit

Inclination (i)

Value

6.1993

1-sigma variation

0.0107

Unit

Long. of Ascending Node (Ω)

Value

26.9633

1-sigma variation

0.0006

Unit

Arg. of Perihelion (ω)

Value

265.2909

1-sigma variation

0.0036

Unit

Mean Anomaly (M)

Value

90.74259

1-sigma variation

0.15324

Unit

Perihelion distance

Value

0.662761

1-sigma variation

Unit

Aphelion distance

Value

1.794713

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.010706

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.069702

1-sigma variation

Unit

MOID

Value

0.002292

1-sigma variation

Unit

Orbit Period

Value

497.4927

1-sigma variation

Unit

U parameter

Value

8.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.23390E-6	8.96888E-7	1.19004E-5	5.72683E-7	1.68322E-6	-1.70216E-4
e	8.96888E-7	6.52382E-7	8.66691E-6	4.12223E-7	1.15405E-6	-1.23717E-4
i	1.19004E-5	8.66691E-6	1.15410E-4	5.37712E-6	1.36862E-5	-1.64137E-3
Ω	5.72683E-7	4.12223E-7	5.37712E-6	3.03963E-7	1.39098E-6	-7.90701E-5
ω	1.68322E-6	1.15405E-6	1.36862E-5	1.39098E-6	1.27566E-5	-2.33337E-4
M	-1.70216E-4	-1.23717E-4	-1.64137E-3	-7.90701E-5	-2.33337E-4	2.34813E-2

Date of computation: 2026-10-27 13:17 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

26.608

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 - 28*

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

0.685513

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-22.353836

Unit

Source

[2]

Last Observation

Value

2026-10-23.964901

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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 2026UG1 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	1956-10-11 18:58	> 1 mo	0.1168088	0.0018407	1.3256979
EARTH	1967-10-17 23:48	> 1 w	0.0287176	0.0043666	0.3271713
VENUS	1973-03-11 01:04	> 1 mo	0.0283680	0.0172484	0.4388158
EARTH	1978-10-15 16:46	> 1 mo	0.0667653	0.0029854	0.6190463
VENUS	1991-01-15 03:09	> 1 d	0.0179713	0.0174964	0.0101527
EARTH	2007-04-13 13:19	> 1 d	0.0678798	0.0155228	0.0997547
EARTH	2015-10-28 07:22	> 1 d	0.1793335	0.0007127	0.0833780
EARTH	2018-04-04 18:13	> 1 d	0.0963130	0.0153025	0.0651917
EARTH	2026-10-19 06:49	< 1 min	0.0060608	0.0060303	0.0000102
EARTH	2033-04-18 15:23	> 1 d	0.1491842	0.0205453	0.0576340
EARTH	2041-10-14 01:30	> 1 d	0.0948525	0.0008752	0.1095993
EARTH	2048-04-11 09:23	> 1 d	0.0566572	0.0160979	0.1156187
EARTH	2056-10-06 16:42	> 1 d	0.1771897	0.0571601	0.0400986
EARTH	2063-04-08 22:18	> 1 d	0.0166293	0.0154088	0.0094884
EARTH	2078-03-30 16:44	> 1 w	0.1920849	0.0172972	0.3688143
VENUS	2090-09-16 15:13	> 1 mo	0.0282567	0.0167276	0.6192599
EARTH	2090-10-20 17:14	> 1 mo	0.0156255	0.0005883	0.7072891
VENUS	2103-01-06 13:31	> 1 mo	0.0280686	0.0167742	9.1451777
EARTH	2108-04-09 08:06	> 1 mo	0.0233392	0.0137029	3.8842845
EARTH	2116-10-15 04:31	> 1 mo	0.0987390	0.0016851	11.7315016

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
65.70686458	283.66865793	0.00229220	MINIMUM
294.17475038	94.82631721	0.01593808	MINIMUM
359.87474463	189.28679799	0.36294332	SADDLE
179.97629984	9.17403182	0.82376044	SADDLE
359.66471847	8.92378037	1.64395764	SADDLE
179.80430615	189.06733017	2.80571834	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2026UG1

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2093-10-19.755	85804.755	1.650	0.000	0.17 ± 0.045	7.60E6	3.34E-8	2.73E-1	-8.23
2094-10-20.019	86170.019	-0.837	0.000	0.11 ± 0.013	8.69E5	8.08E-7	2.68E-1	-6.86
2094-10-20.035	86170.035	-0.740	0.000	0.23 ± 0.000	5.86E7	1.28E-8	2.69E-1	-8.66
2102-10-21.046	89092.046	-0.491	0.000	0.61 ± 0.011	2.02E6	4.30E-7	2.69E-1	-7.18
2102-10-21.062	89092.062	-0.509	0.000	0.53 ± 0.083	1.90E6	4.18E-7	2.69E-1	-7.19
2104-10-20.608	89822.608	2.963	0.000	0.72 ± 0.056	2.57E6	3.93E-9	2.76E-1	-9.22
2107-10-21.434	90918.434	3.187	0.000	0.98 ± 0.000	6.30E6	7.02E-10	2.77E-1	-9.99
2109-10-20.924	91648.924	0.578	0.000	1.08 ± 0.027	2.61E5	1.65E-6	2.71E-1	-6.63
2114-10-21.076	93475.076	0.619	0.000	1.12 ± 0.000	7.69E7	8.01E-9	2.71E-1	-8.97
2115-10-21.297	93840.297	2.967	0.000	0.42 ± 0.054	3.14E5	3.67E-8	2.76E-1	-8.31
2116-10-20.650	94205.650	0.686	0.000	1.00 ± 0.000	1.13E7	4.25E-8	2.71E-1	-8.26
2116-10-20.656	94205.656	-0.463	0.335	1.26 ± 0.022	3.74E6	1.26E-8	2.69E-1	-8.79
2117-10-20.716	94570.716	0.805	0.000	0.92 ± 0.358	6.63E7	9.42E-9	2.71E-1	-8.92
2119-10-21.408	95301.408	0.939	0.000	0.55 ± 0.506	8.90E7	6.48E-9	2.72E-1	-9.09
2120-10-20.619	95666.619	0.692	0.000	0.26 ± 0.127	1.79E7	4.37E-8	2.72E-1	-8.26
2122-10-21.228	96397.228	-0.472	0.000	0.26 ± 0.000	1.52E8	5.79E-9	2.69E-1	-9.15
2126-10-21.157	97858.157	0.688	0.000	1.19 ± 0.000	3.77E7	8.95E-9	2.72E-1	-8.98


Based on 21 optical observations (of which 0 are rejected as outliers) from 2026/10/22.354 to 2026/10/23.965.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.25 and 1.25 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20261027 134728.106 UTC.

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