Asteroids

2025YK1 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.262

Aphelion (Q)

4.707

Eccentricity (e)

0.894

Inclination (i)

3.5

deg

Orbit period (P)

1430.6

Earth MOID

0.02414

U parameter

7.1

Next Earth close approach

Date

2069-12-10

Nominal distance (from Earth center)

0.08915

13336531

Maximum Brightness

20.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.5

mag

Diameter

50 - 120*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-17

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.484728

1-sigma variation

0.001348

Unit

Eccentricity (e)

Value

0.894364

1-sigma variation

0.000076

Unit

Inclination (i)

Value

3.5242

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

63.6090

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

259.9026

1-sigma variation

0.0017

Unit

Mean Anomaly (M)

Value

54.19990

1-sigma variation

0.04502

Unit

Perihelion distance

Value

0.262476

1-sigma variation

Unit

Aphelion distance

Value

4.706981

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.398393

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.582500

1-sigma variation

Unit

MOID

Value

0.024143

1-sigma variation

Unit

Orbit Period

Value

1430.5954

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.81654E-6	1.02442E-7	5.36085E-7	2.33247E-7	-2.20558E-6	-6.06723E-5
e	1.02442E-7	5.77722E-9	3.02307E-8	1.31321E-8	-1.24380E-7	-3.42157E-6
i	5.36085E-7	3.02307E-8	1.59285E-7	7.83669E-8	-6.60002E-7	-1.79052E-5
Ω	2.33247E-7	1.31321E-8	7.83669E-8	1.16841E-7	-3.63797E-7	-7.79023E-6
ω	-2.20558E-6	-1.24380E-7	-6.60002E-7	-3.63797E-7	2.75787E-6	7.36663E-5
M	-6.06723E-5	-3.42157E-6	-1.79052E-5	-7.79023E-6	7.36663E-5	2.02645E-3

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

23.494

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

50 - 120*

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

140

Unit

Source

[1]

Normalized RMS of residuals

Value

0.492134

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-17.389917

Unit

Source

[2]

Last Observation

Value

2026-01-12.448668

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

38 (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

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 2025YK1 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	1956-04-03 22:03	> 1 d	0.0579790	0.0530533	0.0193453
EARTH	1967-12-22 02:25	22.5	0.0212382	0.0210412	0.0001479
EARTH	1979-04-08 03:32	> 1 d	0.0715710	0.0521601	0.0350021
MERCURY	1979-05-24 11:07	> 1 d	0.0408700	0.0003457	0.1046949
EARTH	2006-04-01 08:50	> 1 d	0.1516167	0.0477057	0.0735913
MERCURY	2021-11-24 22:50	> 1 d	0.0272872	0.0123694	0.0236082
EARTH	2025-12-15 09:45	< 1 s	0.0854899	0.0854568	0.0000110
MERCURY	2033-09-15 14:49	> 1 d	0.0116077	0.0115982	0.0021190
MARS	2041-11-21 13:04	> 1 d	0.0307268	0.0295327	0.0249208
EARTH	2069-12-10 11:13	> 1 d	0.0891492	0.0316217	0.0964616

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
47.48723474	342.89387819	0.02414274	MINIMUM
311.95005232	94.03195701	0.04293218	MINIMUM
358.92781470	216.74594045	0.75144251	SADDLE
358.94392228	36.75658802	1.24907303	SADDLE
179.94203498	38.94452801	3.72209953	SADDLE
179.93203920	218.93886618	5.71852746	MAXIMUM

Download:

MOID Plots

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