Asteroids

2026UB help

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

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.980

Aphelion (Q)

1.256

Eccentricity (e)

0.124

Inclination (i)

30.8

deg

Orbit period (P)

431.7

Earth MOID

0.01688

U parameter

7.6

Next Earth close approach

Date

2039-10-16

Nominal distance (from Earth center)

0.01616

2417036

Maximum Brightness

17.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.3

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-10-16

Observatory

TransAstra TKO at e-EYE

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

1.117852

1-sigma variation

0.000422

Unit

Eccentricity (e)

Value

0.123640

1-sigma variation

0.000277

Unit

Inclination (i)

Value

30.8264

1-sigma variation

0.0238

Unit

Long. of Ascending Node (Ω)

Value

22.1728

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

45.7852

1-sigma variation

0.0831

Unit

Mean Anomaly (M)

Value

23.27205

1-sigma variation

0.05498

Unit

Perihelion distance

Value

0.979641

1-sigma variation

Unit

Aphelion distance

Value

1.256064

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.017038

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.203185

1-sigma variation

Unit

MOID

Value

0.016883

1-sigma variation

Unit

Orbit Period

Value

431.6930

1-sigma variation

Unit

U parameter

Value

7.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.78072E-7	1.16690E-7	1.00466E-5	1.02707E-7	-3.47199E-5	2.29337E-5
e	1.16690E-7	7.67590E-8	6.59797E-6	6.72936E-8	-2.25537E-5	1.48857E-5
i	1.00466E-5	6.59797E-6	5.67628E-4	5.79534E-6	-1.94902E-3	1.28680E-3
Ω	1.02707E-7	6.72936E-8	5.79534E-6	5.92617E-8	-2.00317E-5	1.32319E-5
ω	-3.47199E-5	-2.25537E-5	-1.94902E-3	-2.00317E-5	6.90354E-3	-4.56800E-3
M	2.29337E-5	1.48857E-5	1.28680E-3	1.32319E-5	-4.56800E-3	3.02307E-3

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

26.307

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

15 - 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

[-]

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

0.9

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.655861

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-16.02171

Unit

Source

[2]

Last Observation

Value

2026-10-16.947971

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

35 (4)

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 2026UB 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	1955-10-17 12:04	1186.8	0.0443529	0.0159370	0.0232858
EARTH	1968-10-19 20:12	> 1 d	0.1368805	0.0201573	0.0405305
EARTH	2000-10-10 07:49	> 1 d	0.1491048	0.0134525	0.0509561
EARTH	2013-10-14 00:43	> 1 d	0.0542180	0.0158050	0.0428935
EARTH	2026-10-15 22:40	< 1 min	0.0166324	0.0165905	0.0000140
EARTH	2039-10-16 08:59	> 1 d	0.0161569	0.0161534	0.0000175
EARTH	2052-10-15 19:24	> 1 w	0.0167447	0.0161976	0.1483360
EARTH	2065-10-17 16:55	> 1 mo	0.0549172	0.0159642	6.1543603
EARTH	2078-10-21 03:34	> 1 mo	0.1514886	0.0143937	6.9205513
EARTH	2110-10-12 16:21	> 1 mo	0.1349364	0.0141259	4.2026613
EARTH	2123-10-16 05:17	> 1 mo	0.0444886	0.0160120	1.8626001

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
319.31856485	280.30350196	0.01688272	MINIMUM
124.64259720	95.08659736	0.19960667	MINIMUM
42.00927117	12.23614053	0.53147318	SADDLE
223.38620677	182.86291939	0.62235167	SADDLE
22.00459452	167.17457131	1.94083942	SADDLE
154.58227687	298.82702868	2.22257200	MAXIMUM

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MOID Plots

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