Asteroids

2026UC2 help

Last update: 2026-10-30 13:15 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.603

Aphelion (Q)

1.602

Eccentricity (e)

0.453

Inclination (i)

7.0

deg

Orbit period (P)

422.9

Earth MOID

0.00259

U parameter

6.7

Next Earth close approach

Date

2036-06-02

Nominal distance (from Earth center)

0.14448

21614563

Maximum Brightness

25.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.9

mag

Diameter

18 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2026-10-28

Observatory

University of Arizona Catalina Sky Survey

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

1.102642

1-sigma variation

0.000100

Unit

Eccentricity (e)

Value

0.452973

1-sigma variation

0.000112

Unit

Inclination (i)

Value

6.9750

1-sigma variation

0.0021

Unit

Long. of Ascending Node (Ω)

Value

34.3706

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

106.2411

1-sigma variation

0.0014

Unit

Mean Anomaly (M)

Value

356.73066

1-sigma variation

0.00629

Unit

Perihelion distance

Value

0.603175

1-sigma variation

Unit

Aphelion distance

Value

1.602109

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.010677

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.227017

1-sigma variation

Unit

MOID

Value

0.002593

1-sigma variation

Unit

Orbit Period

Value

422.9123

1-sigma variation

Unit

U parameter

Value

6.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.98783E-9	1.10942E-8	2.06154E-7	-6.62435E-9	3.38378E-8	6.26978E-7
e	1.10942E-8	1.25151E-8	2.34820E-7	-7.48916E-9	5.63083E-8	7.02124E-7
i	2.06154E-7	2.34820E-7	4.43640E-6	-1.40586E-7	1.26715E-6	1.31140E-5
Ω	-6.62435E-9	-7.48916E-9	-1.40586E-7	4.49490E-9	-3.52394E-8	-4.19723E-7
ω	3.38378E-8	5.63083E-8	1.26715E-6	-3.52394E-8	1.94182E-6	2.67961E-6
M	6.26978E-7	7.02124E-7	1.31140E-5	-4.19723E-7	2.67961E-6	3.95269E-5

Date of computation: 2026-10-30 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

25.874

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

18 - 40*

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

0.9

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.538133

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2026-10-28.28328

Unit

Source

[2]

Last Observation

Value

2026-10-29.177287

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

47 (3)

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 2026UC2 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	1952-05-26 08:42	> 1 w	0.0697144	0.0669048	0.0462258
EARTH	1957-10-26 08:26	> 1 w	0.0535872	0.0007856	0.3687764
EARTH	1975-05-25 06:36	> 1 w	0.0887536	0.0678748	0.1101210
EARTH	1980-10-22 17:46	> 1 d	0.1329137	0.0012698	0.0654184
VENUS	1982-03-13 02:55	> 1 d	0.0178231	0.0160959	0.0189365
EARTH	1988-11-02 23:43	258.7	0.1848008	0.0997275	0.0283592
EARTH	1998-05-25 04:15	580.3	0.0891790	0.0768238	0.0048016
EARTH	2003-10-25 01:46	333.9	0.1004527	0.0862626	0.0047302
VENUS	2008-08-27 00:57	> 1 d	0.0344647	0.0168174	0.0151723
EARTH	2021-05-29 05:40	364.3	0.0716573	0.0685281	0.0015700
EARTH	2026-10-29 12:34	< 1 s	0.0068317	0.0068260	0.0000019
VENUS	2036-04-29 22:21	1203.6	0.0168821	0.0158784	0.0028891
EARTH	2036-06-02 10:52	483.2	0.1444844	0.1257879	0.0063755
EARTH	2048-10-25 19:20	> 1 d	0.0712560	0.0023405	0.0844994
EARTH	2058-05-28 00:22	> 1 d	0.0666735	0.0665249	0.0046903
EARTH	2063-11-03 22:53	> 1 d	0.1504819	0.0014103	0.0916395
VENUS	2065-04-02 05:27	> 1 w	0.0384461	0.0166975	0.0971035
EARTH	2070-10-21 05:48	282.3	0.1922677	0.1740098	0.0060860
EARTH	2080-05-23 21:31	> 1 d	0.0939672	0.0668625	0.0933373
VENUS	2084-12-04 00:14	> 1 w	0.0245316	0.0167851	0.1632191
EARTH	2085-11-02 00:06	> 1 d	0.0997150	0.0030045	0.2187936
EARTH	2095-06-05 10:15	> 1 w	0.1809409	0.0702113	0.2200971
EARTH	2102-05-15 12:48	> 1 w	0.1994988	0.0747160	0.2550234
EARTH	2107-10-29 04:03	> 1 w	0.0390646	0.0032186	0.2810490
VENUS	2113-11-02 07:17	> 1 d	0.0361263	0.0165779	0.0441680
EARTH	2117-05-27 03:37	> 1 w	0.0758896	0.0674196	0.1005962
EARTH	2122-11-01 04:06	> 1 w	0.0425653	0.0033111	0.5234308
VENUS	2123-01-30 00:24	> 1 mo	0.0268544	0.0172432	0.4667153

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
282.62411756	293.40088300	0.00259257	MINIMUM
77.64865216	142.25214051	0.06589827	MINIMUM
0.61332989	37.85367682	0.39379775	SADDLE
179.91857504	218.07175671	0.60895702	SADDLE
1.59498450	219.40771677	1.61210482	SADDLE
180.86821353	38.65380870	2.58460038	MAXIMUM

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MOID Plots

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