Asteroids

2025YY help

Last update: 2025-12-19 04:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.918

Aphelion (Q)

4.332

Eccentricity (e)

0.650

Inclination (i)

7.1

deg

Orbit period (P)

1553.3

Earth MOID

0.00661

U parameter

7.9

Next Earth close approach

Date

2098-03-24

Nominal distance (from Earth center)

0.16968

25384256

Maximum Brightness

24.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.5

mag

Diameter

22 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-17

Observatory

Pan-STARRS 1, 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

2.624808

1-sigma variation

0.004331

Unit

Eccentricity (e)

Value

0.650338

1-sigma variation

0.000593

Unit

Inclination (i)

Value

7.0927

1-sigma variation

0.0048

Unit

Long. of Ascending Node (Ω)

Value

94.1872

1-sigma variation

0.0022

Unit

Arg. of Perihelion (ω)

Value

30.3656

1-sigma variation

0.0023

Unit

Mean Anomaly (M)

Value

346.92548

1-sigma variation

0.03336

Unit

Perihelion distance

Value

0.917795

1-sigma variation

Unit

Aphelion distance

Value

4.331821

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.013339

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

2.432091

1-sigma variation

Unit

MOID

Value

0.006609

1-sigma variation

Unit

Orbit Period

Value

1553.2619

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.87541E-5	2.56929E-6	2.06598E-5	-8.93991E-7	7.07531E-6	1.44468E-4
e	2.56929E-6	3.51990E-7	2.83043E-6	-1.22633E-7	9.69471E-7	1.97920E-5
i	2.06598E-5	2.83043E-6	2.32425E-5	-2.52476E-6	8.89618E-6	1.59257E-4
Ω	-8.93991E-7	-1.22633E-7	-2.52476E-6	4.96434E-6	-3.84884E-6	-7.23548E-6
ω	7.07531E-6	9.69471E-7	8.89618E-6	-3.84884E-6	5.20536E-6	5.47474E-5
M	1.44468E-4	1.97920E-5	1.59257E-4	-7.23548E-6	5.47474E-5	1.11290E-3

Date of computation: 2025-12-19 04:30 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

25.452

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

22 - 50*

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

0.664493

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-17.345338

Unit

Source

[2]

Last Observation

Value

2025-12-19.159778

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

34 (2)

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 2025YY 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	1958-02-16 18:29	> 1 mo	0.1061303	0.1035924	0.0395597
EARTH	1974-12-23 11:45	> 1 mo	0.0481159	0.0324492	0.3936556
EARTH	2025-12-23 06:47	1.3	0.0065772	0.0065616	0.0000052
EARTH	2098-03-24 00:22	> 1 mo	0.1696833	0.1138570	0.3253962
EARTH	2114-12-22 16:02	> 1 w	0.0249719	0.0106492	0.1359533

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
344.40688930	350.30580771	0.00660908	MINIMUM
0.76711871	204.26134689	1.93349538	SADDLE
180.24358287	203.25668336	3.31767271	SADDLE
180.02030576	23.15104117	5.31516343	MAXIMUM

Download:

MOID Plots

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