Asteroids

2026UL1 help

Last update: 2026-10-24 13:17 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Aten

Perihelion (q)

0.784

Aphelion (Q)

1.064

Eccentricity (e)

0.152

Inclination (i)

0.7

deg

Orbit period (P)

324.4

Earth MOID

0.00246

U parameter

5.5

Next Earth close approach

Date

2034-10-23

Nominal distance (from Earth center)

0.02472

3698612

Maximum Brightness

21.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-10-22

Observatory

ATLAS South Africa, Sutherland

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

0.924056

1-sigma variation

0.000011

Unit

Eccentricity (e)

Value

0.151747

1-sigma variation

0.000041

Unit

Inclination (i)

Value

0.7277

1-sigma variation

0.0003

Unit

Long. of Ascending Node (Ω)

Value

37.1056

1-sigma variation

0.0029

Unit

Arg. of Perihelion (ω)

Value

220.5872

1-sigma variation

0.0010

Unit

Mean Anomaly (M)

Value

188.42538

1-sigma variation

0.00695

Unit

Perihelion distance

Value

0.783833

1-sigma variation

Unit

Aphelion distance

Value

1.064278

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.027173

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.195417

1-sigma variation

Unit

MOID

Value

0.002461

1-sigma variation

Unit

Orbit Period

Value

324.4483

1-sigma variation

Unit

U parameter

Value

5.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.20072E-10	-4.06623E-10	-9.79920E-10	-5.65475E-9	-6.57789E-9	4.14127E-8
e	-4.06623E-10	1.65429E-9	-1.71841E-9	6.61142E-8	3.35525E-8	-2.37258E-7
i	-9.79920E-10	-1.71841E-9	1.04572E-7	-8.48679E-7	-1.16263E-7	1.43231E-6
Ω	-5.65475E-9	6.61142E-8	-8.48679E-7	8.57660E-6	1.91322E-6	-1.84398E-5
ω	-6.57789E-9	3.35525E-8	-1.16263E-7	1.91322E-6	1.08945E-6	-6.17200E-6
M	4.14127E-8	-2.37258E-7	1.43231E-6	-1.84398E-5	-6.17200E-6	4.82449E-5

Date of computation: 2026-10-24 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

27.353

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

9 - 20*

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

0.423696

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-22.889174

Unit

Source

[2]

Last Observation

Value

2026-10-24.248243

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

56 (1)

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 2026UL1 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	1953-10-13 04:13	> 1 mo	0.0353364	0.0123688	350.5491743
EARTH	1955-02-12 07:47	> 1 mo	0.1162773	0.0032767	342.7872698
EARTH	1964-10-13 23:56	> 1 mo	0.0955343	0.0125571	126.8959892
EARTH	1966-02-13 19:25	> 1 mo	0.0503446	0.0030405	177.3667534
EARTH	1975-10-15 22:35	> 1 mo	0.1143058	0.0094066	8.8429119
EARTH	1977-02-14 06:17	> 1 mo	0.0303948	0.0036105	31.5391897
EARTH	1986-10-20 15:27	> 1 mo	0.0342646	0.0125353	22.1504674
EARTH	1996-10-18 02:58	> 1 mo	0.1604506	0.0110973	1.6905823
EARTH	1998-02-13 09:42	> 1 w	0.0344013	0.0034847	5.0012360
EARTH	2008-02-13 03:40	674.6	0.0033752	0.0033524	0.0004913
EARTH	2016-10-20 12:24	62.7	0.1881685	0.1870395	0.0003763
EARTH	2018-02-13 09:38	24.3	0.0326919	0.0276489	0.0016829
EARTH	2026-10-19 22:52	< 1 min	0.0030812	0.0030785	0.0000009
EARTH	2034-10-23 01:05	299.6	0.0247237	0.0220314	0.0008981
EARTH	2042-08-16 11:00	> 1 d	0.1756130	0.1698161	0.0019323
EARTH	2042-12-29 09:29	> 1 d	0.0723512	0.0684575	0.0013015
EARTH	2051-02-03 08:05	114.1	0.0606325	0.0419448	0.0062911
EARTH	2057-10-19 00:54	98.6	0.1289069	0.1280223	0.0002949
EARTH	2065-11-02 01:17	> 1 d	0.0489282	0.0349955	0.0046526
EARTH	2066-04-18 02:01	> 1 d	0.1932465	0.1864800	0.0022573
EARTH	2074-02-01 15:45	415.1	0.0128768	0.0123594	0.0005230
EARTH	2080-10-19 01:46	> 1 d	0.0196324	0.0006648	0.0338506
EARTH	2088-11-25 06:03	> 1 mo	0.0745628	0.0121544	0.1372139
EARTH	2089-04-07 15:18	> 1 mo	0.1743776	0.0377344	0.2397422
EARTH	2097-01-27 23:44	> 1 mo	0.0359781	0.0120184	0.5867807
EARTH	2105-02-05 05:01	> 1 w	0.0344351	0.0119621	0.8169570
EARTH	2111-10-22 16:13	> 1 w	0.1689971	0.0060997	0.9763916
EARTH	2119-11-04 13:07	> 1 mo	0.0487235	0.0009423	2.2886131
EARTH	2120-04-19 12:59	> 1 mo	0.1933094	0.0366267	1.1482185

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
120.69627630	283.54526332	0.00246092	MINIMUM
244.09265283	30.75948914	0.01243955	MINIMUM
182.49294035	337.20081924	0.08010208	SADDLE
3.02469908	157.81622045	0.22992283	SADDLE
2.84726998	337.61871363	1.76844406	SADDLE
182.19221628	156.95578611	2.07783500	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2026UL1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2097-10-21.245	87267.245	-3.428	2.34 ± 0.049	1.55E6	3.29E-9	4.09E-2	-9.92
2106-10-20.389	90552.389	-3.628	1.06 ± 0.029	4.33E5	6.41E-9	4.10E-2	-9.68
2109-10-19.034	91647.034	4.449	1.31 ± 0.036	5.27E5	1.83E-10	4.07E-2	-11.25
2109-10-20.942	91648.942	-0.639	1.87 ± 0.070	2.69E6	5.61E-7	4.09E-2	-7.76
2110-10-22.285	92015.285	-0.191	2.17 ± 1.487	1.24E7	8.05E-8	4.10E-2	-8.61
2111-10-21.369	92379.369	-0.613	2.21 ± 0.127	2.28E7	4.39E-8	4.09E-2	-8.87
2114-10-20.861	93474.861	-0.639	2.55 ± 0.118	1.16E7	8.33E-8	4.09E-2	-8.61
2118-10-18.900	94933.900	4.086	2.10 ± 0.056	1.54E5	2.01E-9	4.09E-2	-10.25
2120-10-21.909	95667.909	-0.607	2.66 ± 0.268	1.98E7	5.96E-8	4.09E-2	-8.79
2121-10-21.538	96032.538	-3.447	2.08 ± 0.063	1.58E7	2.78E-10	4.10E-2	-11.12
2122-10-19.456	96395.456	4.874	1.33 ± 0.068	1.14E5	1.20E-10	4.07E-2	-11.49


Based on 56 optical observations (of which 1 are rejected as outliers) from 2026/10/22.889 to 2026/10/24.248.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.66 and 2.66 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20261024 133414.776 UTC.

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