Asteroids

2025UC1 help

Last update: 2025-10-19 12:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.762

Aphelion (Q)

1.023

Eccentricity (e)

0.146

Inclination (i)

3.1

deg

Orbit period (P)

308.1

Earth MOID

0.02106

U parameter

6.9

Next Earth close approach

Date

2036-06-14

Nominal distance (from Earth center)

0.19206

28731907

Maximum Brightness

32.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.1

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-18

Observatory

Mt. Lemmon 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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.892730

1-sigma variation

0.000086

Unit

Eccentricity (e)

Value

0.146086

1-sigma variation

0.000118

Unit

Inclination (i)

Value

3.0779

1-sigma variation

0.0031

Unit

Long. of Ascending Node (Ω)

Value

20.0094

1-sigma variation

0.0031

Unit

Arg. of Perihelion (ω)

Value

172.0861

1-sigma variation

0.0536

Unit

Mean Anomaly (M)

Value

235.81610

1-sigma variation

0.07113

Unit

Perihelion distance

Value

0.762315

1-sigma variation

Unit

Aphelion distance

Value

1.023146

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.023541

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.239934

1-sigma variation

Unit

MOID

Value

0.021063

1-sigma variation

Unit

Orbit Period

Value

308.0909

1-sigma variation

Unit

U parameter

Value

6.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.44535E-9	-9.12247E-9	-2.65663E-7	-1.72835E-7	-2.64712E-6	2.95734E-6
e	-9.12247E-9	1.38592E-8	3.46329E-7	8.72709E-8	9.70728E-7	-3.96129E-7
i	-2.65663E-7	3.46329E-7	9.67480E-6	5.23961E-6	7.68643E-5	-8.05911E-5
Ω	-1.72835E-7	8.72709E-8	5.23961E-6	9.84613E-6	1.66950E-4	-2.18541E-4
ω	-2.64712E-6	9.70728E-7	7.68643E-5	1.66950E-4	2.86779E-3	-3.78735E-3
M	2.95734E-6	-3.96129E-7	-8.05911E-5	-2.18541E-4	-3.78735E-3	5.05985E-3

Date of computation: 2025-10-19 12:00 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

28.14

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

6 - 14*

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

0.637997

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-18.248993

Unit

Source

[2]

Last Observation

Value

2025-10-19.153785

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

22 (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

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2025UC1 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1955-06-26 17:54	> 1 mo	0.1797576	0.1259533	0.0200634
EARTH	1955-11-18 04:34	> 1 d	0.0802838	0.0280121	0.0442655
EARTH	1960-09-07 07:19	578.5	0.1597932	0.0469693	0.0403889
EARTH	1971-10-20 20:46	> 1 d	0.0229121	0.0227553	0.0000934
EARTH	1982-11-17 13:16	633.3	0.1472352	0.0805552	0.0226612
EARTH	1987-09-06 23:23	552.8	0.0980349	0.0356364	0.0251170
EARTH	1988-02-06 02:09	> 1 mo	0.1866432	0.1582482	0.0101116
EARTH	1998-10-24 15:06	> 1 d	0.0218308	0.0216087	0.0005887
EARTH	2009-06-15 08:51	> 1 w	0.1921423	0.1824039	0.0033062
EARTH	2009-11-17 08:55	50.5	0.1067917	0.0781680	0.0096919
EARTH	2014-09-05 18:43	116.7	0.1442935	0.1194643	0.0083231
EARTH	2025-10-16 05:02	27.0	0.0232239	0.0231558	0.0000227
EARTH	2036-06-14 13:49	> 1 w	0.1920609	0.1830518	0.0030431
EARTH	2036-11-16 13:27	88.5	0.1054040	0.0786094	0.0090576
EARTH	2041-09-04 11:06	99.2	0.1477012	0.1011224	0.0157236
EARTH	2052-10-13 22:20	> 1 w	0.0237179	0.0234748	0.0012275
EARTH	2063-06-11 04:26	> 1 w	0.1960129	0.1826518	0.0046306
EARTH	2063-11-16 12:43	243.9	0.1143416	0.0783347	0.0122672
EARTH	2068-09-03 07:37	230.8	0.1400925	0.1183900	0.0072492
EARTH	2079-10-16 11:22	> 1 d	0.0230610	0.0222035	0.0005452
EARTH	2090-11-15 09:33	200.7	0.1343785	0.0930475	0.0138888
EARTH	2095-09-03 04:50	59.0	0.1355776	0.1018590	0.0114024
EARTH	2106-10-15 07:00	> 1 w	0.0233994	0.0230328	0.0010928
EARTH	2117-11-14 18:04	113.1	0.1424145	0.1204865	0.0073336
EARTH	2122-09-02 10:50	115.8	0.1299207	0.1256874	0.0014133
EARTH	2123-02-12 21:39	1048.2	0.1998839	0.1990768	0.0002694

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
208.44415849	296.32696079	0.02106252	MINIMUM
170.83561938	263.86359871	0.02391507	MINIMUM
179.35590987	271.21536764	0.02401743	SADDLE
8.91436706	99.82509827	0.23997431	SADDLE
8.69353370	279.57649218	1.76145345	SADDLE
186.55729251	97.42046520	2.02509130	MAXIMUM

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MOID Plots

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