Asteroids

2026UJ1 help

Last update: 2026-10-25 13:02 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.975

Aphelion (Q)

2.056

Eccentricity (e)

0.357

Inclination (i)

8.2

deg

Orbit period (P)

681.5

Earth MOID

0.00251

U parameter

6.2

Next Earth close approach

Date

2054-10-11

Nominal distance (from Earth center)

0.065

9723334

Maximum Brightness

23.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

12 - 28*

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

1.515620

1-sigma variation

0.000113

Unit

Eccentricity (e)

Value

0.356837

1-sigma variation

0.000049

Unit

Inclination (i)

Value

8.1925

1-sigma variation

0.0009

Unit

Long. of Ascending Node (Ω)

Value

29.4313

1-sigma variation

2.655E-5

Unit

Arg. of Perihelion (ω)

Value

23.9473

1-sigma variation

0.0005

Unit

Mean Anomaly (M)

Value

22.96676

1-sigma variation

0.00217

Unit

Perihelion distance

Value

0.974791

1-sigma variation

Unit

Aphelion distance

Value

2.056449

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002997

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.959118

1-sigma variation

Unit

MOID

Value

0.002506

1-sigma variation

Unit

Orbit Period

Value

681.5282

1-sigma variation

Unit

U parameter

Value

6.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.26600E-8	5.46117E-9	9.57439E-8	2.98082E-9	-4.99321E-8	-2.43765E-7
e	5.46117E-9	2.35582E-9	4.13025E-8	1.28591E-9	-2.15260E-8	-1.05160E-7
i	9.57439E-8	4.13025E-8	7.24561E-7	2.25678E-8	-3.76723E-7	-1.84393E-6
Ω	2.98082E-9	1.28591E-9	2.25678E-8	7.04680E-10	-1.17040E-8	-5.74189E-8
ω	-4.99321E-8	-2.15260E-8	-3.76723E-7	-1.17040E-8	2.07931E-7	9.56705E-7
M	-2.43765E-7	-1.05160E-7	-1.84393E-6	-5.74189E-8	9.56705E-7	4.69570E-6

Date of computation: 2026-10-25 13:02 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

26.639

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

12 - 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

0.487333

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-22.947852

Unit

Source

[2]

Last Observation

Value

2026-10-25.152946

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (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 2026UJ1 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	1961-10-29 18:54	> 1 d	0.0227409	0.0110059	0.0039188
EARTH	1982-11-22 04:32	> 1 d	0.0845529	0.0548865	0.0114304
EARTH	2005-09-27 21:51	1353.8	0.1837490	0.1430099	0.0136252
EARTH	2026-10-23 06:23	< 1 s	0.0025242	0.0025233	0.0000003
EARTH	2054-10-11 18:03	> 1 d	0.0649965	0.0177786	0.0159337
EARTH	2067-12-07 07:18	> 1 d	0.1221083	0.1012412	0.0075820
EARTH	2095-10-15 06:58	> 1 w	0.0444373	0.0019795	0.0539869
EARTH	2108-11-06 06:42	> 1 mo	0.0447586	0.0088778	0.1190204

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
343.75292833	287.85498468	0.00250572	MINIMUM
180.21216550	130.01039314	1.05051740	SADDLE
358.63977015	128.97783556	1.98318504	SADDLE
178.75979133	309.01941837	3.04433309	MAXIMUM

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MOID Plots

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