Asteroids

2025HY2 help

Last update: 2025-05-03 00:31 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.901

Aphelion (Q)

3.939

Eccentricity (e)

0.628

Inclination (i)

6.1

deg

Orbit period (P)

1374.9

Earth MOID

0.03890

U parameter

8.6

Next Earth close approach

Date

2025-05-07

Nominal distance (from Earth center)

0.04559

6820430

Maximum Brightness

21.3

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

24.8

mag

Diameter

29 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-04-23

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.419836

1-sigma variation

0.009646

Unit

Eccentricity (e)

Value

0.627798

1-sigma variation

0.001556

Unit

Inclination (i)

Value

6.0596

1-sigma variation

0.0090

Unit

Long. of Ascending Node (Ω)

Value

70.0518

1-sigma variation

0.0168

Unit

Arg. of Perihelion (ω)

Value

201.1299

1-sigma variation

0.0122

Unit

Mean Anomaly (M)

Value

351.04779

1-sigma variation

0.05836

Unit

Perihelion distance

Value

0.900667

1-sigma variation

Unit

Aphelion distance

Value

3.939005

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.550467

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.088986

1-sigma variation

Unit

MOID

Value

0.038902

1-sigma variation

Unit

Orbit Period

Value

1374.9200

1-sigma variation

Unit

U parameter

Value

8.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.30451E-5	1.50081E-5	8.64603E-5	1.61565E-4	-1.17408E-4	5.62922E-4
e	1.50081E-5	2.42079E-6	1.39460E-5	2.60597E-5	-1.89370E-5	9.07988E-5
i	8.64603E-5	1.39460E-5	8.03585E-5	1.50002E-4	-1.08945E-4	5.23081E-4
Ω	1.61565E-4	2.60597E-5	1.50002E-4	2.81532E-4	-2.05037E-4	9.77486E-4
ω	-1.17408E-4	-1.89370E-5	-1.08945E-4	-2.05037E-4	1.49543E-4	-7.10341E-4
M	5.62922E-4	9.07988E-5	5.23081E-4	9.77486E-4	-7.10341E-4	3.40567E-3

Date of computation: 2025-05-02 13:17 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

24.805

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

29 - 70*

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

0.715051

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-04-23.349203

Unit

Source

[2]

Last Observation

Value

2025-05-02.08687

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

45 (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 2025HY2 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	1968-07-23 09:08	> 1 mo	0.0867222	0.0864116	0.8156591
EARTH	1991-05-14 06:32	> 1 mo	0.0324922	0.0310015	0.2982882
EARTH	2025-05-07 07:18	< 1 min	0.0455918	0.0453058	0.0000953
EARTH	2040-06-21 12:53	> 1 mo	0.1130442	0.1061654	0.0668501
EARTH	2078-05-06 09:08	> 1 mo	0.0829185	0.0276330	1.3353215

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
339.50959485	126.88447490	0.03890183	MINIMUM
20.12868215	210.01690872	0.09585428	MINIMUM
3.06152570	175.12383231	0.12269905	SADDLE
0.37509508	349.43406891	1.88424368	SADDLE
180.14434460	348.95411093	2.95601867	SADDLE
180.00267133	168.88838665	4.95441369	MAXIMUM

Download:

MOID Plots

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