Asteroids

2025KY4 help

Last update: 2025-05-31 13:00 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

1.007

Aphelion (Q)

1.305

Eccentricity (e)

0.129

Inclination (i)

4.9

deg

Orbit period (P)

454.1

Earth MOID

0.01880

U parameter

6.6

Next Earth close approach

Date

2025-06-05

Nominal distance (from Earth center)

0.01853

2772118

Maximum Brightness

20.1

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

27.1

mag

Diameter

10 - 23*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-05-27

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.156179

1-sigma variation

0.000100

Unit

Eccentricity (e)

Value

0.128685

1-sigma variation

0.000079

Unit

Inclination (i)

Value

4.9099

1-sigma variation

0.0023

Unit

Long. of Ascending Node (Ω)

Value

246.2993

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

43.1167

1-sigma variation

0.0034

Unit

Mean Anomaly (M)

Value

308.11643

1-sigma variation

0.00850

Unit

Perihelion distance

Value

1.007396

1-sigma variation

Unit

Aphelion distance

Value

1.304962

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.026218

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.268360

1-sigma variation

Unit

MOID

Value

0.018800

1-sigma variation

Unit

Orbit Period

Value

454.0838

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.96087E-9	7.86947E-9	2.33240E-7	-9.38796E-9	-5.50799E-8	8.14343E-7
e	7.86947E-9	6.25081E-9	1.83045E-7	-7.35547E-9	-2.38598E-8	6.29601E-7
i	2.33240E-7	1.83045E-7	5.51026E-6	-2.22219E-7	-1.99559E-6	1.95615E-5
Ω	-9.38796E-9	-7.35547E-9	-2.22219E-7	9.00109E-9	8.73423E-8	-7.92290E-7
ω	-5.50799E-8	-2.38598E-8	-1.99559E-6	8.73423E-8	1.18254E-5	-1.25728E-5
M	8.14343E-7	6.29601E-7	1.95615E-5	-7.92290E-7	-1.25728E-5	7.22289E-5

Date of computation: 2025-05-31 13:00 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

27.051

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

10 - 23*

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

0.751494

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-05-27.296852

Unit

Source

[2]

Last Observation

Value

2025-05-31.040352

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (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 2025KY4 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	1979-08-28 11:17	> 1 d	0.1816200	0.1052463	0.0292569
EARTH	1984-06-24 07:02	> 1 d	0.0555485	0.0297244	0.0086231
EARTH	1989-05-29 09:40	> 1 d	0.0533805	0.0149360	0.0159559
EARTH	1989-10-01 23:04	> 1 w	0.1653552	0.1415735	0.0093270
EARTH	2020-04-27 19:41	> 1 d	0.1822447	0.1728440	0.0031659
EARTH	2020-08-20 20:42	512.5	0.1249240	0.1164766	0.0029067
EARTH	2025-06-05 06:31	< 1 min	0.0185305	0.0185024	0.0000093
EARTH	2056-07-11 20:16	> 1 w	0.0723293	0.0431973	0.0119197
EARTH	2061-05-26 18:31	> 1 d	0.0842850	0.0332380	0.0173903
EARTH	2061-10-14 04:00	> 1 w	0.1823127	0.1585502	0.0089228
EARTH	2092-06-24 17:31	> 1 w	0.0564743	0.0038037	0.0495318
EARTH	2097-05-26 13:54	> 1 d	0.0871693	0.0143823	0.0470389
EARTH	2097-10-14 20:38	> 1 mo	0.1838903	0.1382615	0.0246569

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
329.14529201	151.84561609	0.01880046	MINIMUM
183.96153718	10.42750866	0.32833159	SADDLE
359.92722329	7.10548419	1.99031203	SADDLE
178.72021805	185.87636757	2.32021028	MAXIMUM

Download:

MOID Plots

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