Asteroids

2025YU help

Last update: 2025-12-22 13:01 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.713

Aphelion (Q)

1.183

Eccentricity (e)

0.248

Inclination (i)

12.1

deg

Orbit period (P)

337.3

Earth MOID

0.01695

U parameter

6.2

Next Earth close approach

Date

2036-07-23

Nominal distance (from Earth center)

0.1544

23098389

Maximum Brightness

26.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.8

mag

Diameter

18 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-17

Observatory

Pan-STARRS 2, Haleakala

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

0.948283

1-sigma variation

0.000033

Unit

Eccentricity (e)

Value

0.247792

1-sigma variation

0.000251

Unit

Inclination (i)

Value

12.1401

1-sigma variation

0.0148

Unit

Long. of Ascending Node (Ω)

Value

87.4655

1-sigma variation

0.0019

Unit

Arg. of Perihelion (ω)

Value

118.6869

1-sigma variation

0.0023

Unit

Mean Anomaly (M)

Value

236.24179

1-sigma variation

0.03392

Unit

Perihelion distance

Value

0.713305

1-sigma variation

Unit

Aphelion distance

Value

1.183260

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.026253

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.222239

1-sigma variation

Unit

MOID

Value

0.016946

1-sigma variation

Unit

Orbit Period

Value

337.2913

1-sigma variation

Unit

U parameter

Value

6.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.09694E-9	8.29654E-9	4.87467E-7	-6.12512E-8	-7.34728E-8	1.12194E-6
e	8.29654E-9	6.31075E-8	3.70811E-6	-4.65970E-7	-5.46973E-7	8.51766E-6
i	4.87467E-7	3.70811E-6	2.17886E-4	-2.73802E-5	-3.21317E-5	5.00476E-4
Ω	-6.12512E-8	-4.65970E-7	-2.73802E-5	3.44070E-6	4.03643E-6	-6.28892E-5
ω	-7.34728E-8	-5.46973E-7	-3.21317E-5	4.03643E-6	5.13446E-6	-7.43671E-5
M	1.12194E-6	8.51766E-6	5.00476E-4	-6.28892E-5	-7.43671E-5	1.15038E-3

Date of computation: 2025-12-22 13:01 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

25.801

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

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.56667

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-12.371768

Unit

Source

[2]

Last Observation

Value

2025-12-22.074392

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

37 (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 2025YU 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	1956-12-19 02:17	336.0	0.1498757	0.1257036	0.0080658
EARTH	1966-07-22 05:04	1091.5	0.1562103	0.1542596	0.0008374
EARTH	1967-12-14 02:39	685.2	0.1437781	0.1357957	0.0026673
EARTH	1979-12-22 17:33	20.2	0.0279311	0.0217605	0.0021666
EARTH	1989-07-26 16:34	52.6	0.1542327	0.1538184	0.0001395
EARTH	1990-12-10 12:14	193.8	0.1603011	0.1577560	0.0008492
EARTH	2002-12-21 04:05	43.8	0.0993570	0.0971404	0.0007391
EARTH	2012-07-19 23:27	633.3	0.1603904	0.1584873	0.0006856
EARTH	2013-12-15 21:10	321.8	0.1297790	0.1253623	0.0014740
EARTH	2025-12-22 15:39	< 1 min	0.0385995	0.0384700	0.0000432
EARTH	2036-07-23 08:59	462.7	0.1544032	0.1541346	0.0001366
EARTH	2037-12-01 15:40	1001.7	0.1984701	0.1912809	0.0024065
EARTH	2050-12-23 04:08	149.6	0.0392666	0.0252269	0.0051693
EARTH	2061-08-08 01:04	16.2	0.1904817	0.1897233	0.0002528
EARTH	2063-12-23 04:00	13.6	0.0582065	0.0574083	0.0002662
EARTH	2074-07-25 03:52	1173.5	0.1533283	0.1522191	0.0006949
EARTH	2088-12-22 01:09	503.4	0.0605101	0.0345101	0.0091393
EARTH	2099-07-30 02:42	476.0	0.1546196	0.1542966	0.0001765
EARTH	2113-12-23 18:44	241.9	0.0554652	0.0273545	0.0103715
EARTH	2124-07-21 07:42	726.3	0.1598538	0.1589087	0.0003851
EARTH	2125-12-05 21:04	718.7	0.1859023	0.1799998	0.0019746

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
258.61083463	349.82359891	0.01694581	MINIMUM
84.37203229	203.48485840	0.15451157	MINIMUM
167.06171463	276.03520642	0.28099347	SADDLE
353.72657479	95.79364908	0.33309382	SADDLE
2.56596812	287.39833055	1.70221790	SADDLE
185.24873604	110.32328971	2.18031341	MAXIMUM

Download:

MOID Plots

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