Asteroids

2025YY3 help

Last update: 2026-01-05 12:45 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.850

Aphelion (Q)

2.848

Eccentricity (e)

0.540

Inclination (i)

6.8

deg

Orbit period (P)

918.3

Earth MOID

0.04062

U parameter

9.0

Next Earth close approach

Date

2031-01-26

Nominal distance (from Earth center)

0.11874

17762897

Maximum Brightness

24.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

26 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-21

Observatory

Kitt Peak-Bok

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

1.848993

1-sigma variation

0.013193

Unit

Eccentricity (e)

Value

0.540231

1-sigma variation

0.003574

Unit

Inclination (i)

Value

6.7661

1-sigma variation

0.0392

Unit

Long. of Ascending Node (Ω)

Value

87.3810

1-sigma variation

0.0090

Unit

Arg. of Perihelion (ω)

Value

73.7274

1-sigma variation

0.0033

Unit

Mean Anomaly (M)

Value

326.72713

1-sigma variation

0.38165

Unit

Perihelion distance

Value

0.850111

1-sigma variation

Unit

Aphelion distance

Value

2.847875

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.153419

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.524856

1-sigma variation

Unit

MOID

Value

0.040620

1-sigma variation

Unit

Orbit Period

Value

918.3354

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.74063E-4	4.71537E-5	5.17277E-4	1.19208E-4	-4.25387E-5	5.03523E-3
e	4.71537E-5	1.27739E-5	1.40130E-4	3.22934E-5	-1.15231E-5	1.36404E-3
i	5.17277E-4	1.40130E-4	1.53724E-3	3.54267E-4	-1.26449E-4	1.49636E-2
Ω	1.19208E-4	3.22934E-5	3.54267E-4	8.16487E-5	-2.91661E-5	3.44841E-3
ω	-4.25387E-5	-1.15231E-5	-1.26449E-4	-2.91661E-5	1.06191E-5	-1.23058E-3
M	5.03523E-3	1.36404E-3	1.49636E-2	3.44841E-3	-1.23058E-3	1.45657E-1

Date of computation: 2026-01-05 12:45 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

25.048

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

26 - 60*

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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.361185

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-21.334993

Unit

Source

[2]

Last Observation

Value

2026-01-03.970519

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

19 (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 2025YY3 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	1953-02-14 14:55	> 1 mo	0.1610722	0.0252010	2.0573799
EARTH	1958-04-04 11:04	> 1 mo	0.1515409	0.0928913	2.2699639
EARTH	1963-05-04 04:44	> 1 mo	0.1005664	0.0918463	1.7712256
EARTH	2026-01-05 07:46	< 1 min	0.0464198	0.0456062	0.0002712
EARTH	2031-01-26 04:56	> 1 mo	0.1187376	0.0277331	0.2372383
EARTH	2036-03-05 09:30	> 1 mo	0.1750541	0.1674451	0.0219174
EARTH	2041-04-16 16:19	> 1 mo	0.1256569	0.0871947	0.5025056
EARTH	2046-05-06 18:05	> 1 mo	0.1084832	0.0878775	0.6715928
EARTH	2114-01-04 06:48	> 1 mo	0.0746663	0.0437857	1.1410026
EARTH	2119-01-19 11:18	> 1 mo	0.0864796	0.0422812	0.5903461
EARTH	2124-02-28 06:02	> 1 w	0.1726122	0.1324703	0.0133836

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
328.68171460	5.26554878	0.04062006	MINIMUM
34.43030572	118.25944250	0.08935078	MINIMUM
3.37527394	64.85088342	0.17747701	SADDLE
180.65161475	240.35712397	1.84850764	SADDLE
1.77610389	241.91766898	1.85628491	SADDLE
180.38243481	60.20347287	3.83522126	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out