Asteroids

2025YU6 help

Last update: 2026-03-18 10:55 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.949

Aphelion (Q)

1.485

Eccentricity (e)

0.220

Inclination (i)

1.5

deg

Orbit period (P)

490.4

Earth MOID

0.00515

U parameter

5.9

Next Earth close approach

Date

2030-04-03

Nominal distance (from Earth center)

0.02537

3794597

Maximum Brightness

21.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

17 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-26

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.217084

1-sigma variation

0.000041

Unit

Eccentricity (e)

Value

0.219913

1-sigma variation

0.000029

Unit

Inclination (i)

Value

1.5370

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

304.7013

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

204.7042

1-sigma variation

0.0003

Unit

Mean Anomaly (M)

Value

84.63859

1-sigma variation

0.00400

Unit

Perihelion distance

Value

0.949431

1-sigma variation

Unit

Aphelion distance

Value

1.484736

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.431749

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.019208

1-sigma variation

Unit

MOID

Value

0.005155

1-sigma variation

Unit

Orbit Period

Value

490.4324

1-sigma variation

Unit

U parameter

Value

5.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.66576E-9	1.19680E-9	5.78239E-9	1.85199E-8	-9.98946E-9	-1.63069E-7
e	1.19680E-9	8.59869E-10	4.15469E-9	1.33034E-8	-7.17158E-9	-1.17162E-7
i	5.78239E-9	4.15469E-9	2.00920E-8	6.40469E-8	-3.43081E-8	-5.66140E-7
Ω	1.85199E-8	1.33034E-8	6.40469E-8	2.09290E-7	-1.15896E-7	-1.81214E-6
ω	-9.98946E-9	-7.17158E-9	-3.43081E-8	-1.15896E-7	6.78465E-8	9.76080E-7
M	-1.63069E-7	-1.17162E-7	-5.66140E-7	-1.81214E-6	9.76080E-7	1.59642E-5

Date of computation: 2026-03-18 10:55 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

25.987

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

17 - 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

[-]

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

Unit

Source

[1]

Unobserved

Value

123

Unit

Source

[1]

Normalized RMS of residuals

Value

0.561013

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-17.290702

Unit

Source

[2]

Last Observation

Value

2026-01-14.551819

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

70 (1)

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

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 2025YU6 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	1954-01-21 12:01	> 1 w	0.0163831	0.0076373	0.0183780
EARTH	1973-03-01 18:37	> 1 w	0.0380879	0.0343351	0.0025687
EARTH	1992-03-27 20:39	601.8	0.0227837	0.0223907	0.0001972
EARTH	2006-12-23 23:13	259.9	0.1942938	0.1819958	0.0040996
EARTH	2011-04-16 10:07	466.4	0.1062814	0.0937155	0.0042038
EARTH	2026-01-11 21:26	< 1 min	0.0106027	0.0105988	0.0000013
EARTH	2030-04-03 19:17	454.2	0.0253653	0.0248368	0.0002419
EARTH	2061-01-30 00:09	> 1 w	0.0281381	0.0070396	0.0177635
EARTH	2065-04-22 20:28	> 1 d	0.1753429	0.0541205	0.0415153
EARTH	2088-02-01 13:14	> 1 mo	0.0298480	0.0080230	0.2039170
EARTH	2111-01-20 00:02	> 1 mo	0.0109780	0.0034464	2.5715532
EARTH	2126-01-28 15:02	> 1 mo	0.0247076	0.0059854	109.1100804

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
331.20702403	9.25629855	0.00515491	MINIMUM
34.46183894	86.43348747	0.02485397	MINIMUM
5.54303773	51.14192078	0.04135995	SADDLE
182.27700686	227.28751549	0.47329259	SADDLE
3.41951415	228.50189901	1.96092625	SADDLE
182.03732676	47.08360377	2.47322866	MAXIMUM

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MOID Plots

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