Asteroids

2025YK1 help

Last update: 2026-02-01 12:45 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.263

Aphelion (Q)

4.705

Eccentricity (e)

0.894

Inclination (i)

3.5

deg

Orbit period (P)

1429.8

Earth MOID

0.02409

U parameter

7.1

Next Earth close approach

Date

2069-12-10

Nominal distance (from Earth center)

0.08915

13336518

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

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.483751

1-sigma variation

0.001346

Unit

Eccentricity (e)

Value

0.894308

1-sigma variation

0.000076

Unit

Inclination (i)

Value

3.5280

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

63.6761

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

259.8324

1-sigma variation

0.0017

Unit

Mean Anomaly (M)

Value

3.88102

1-sigma variation

0.00407

Unit

Perihelion distance

Value

0.262512

1-sigma variation

Unit

Aphelion distance

Value

4.704991

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.397070

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.584682

1-sigma variation

Unit

MOID

Value

0.024089

1-sigma variation

Unit

Orbit Period

Value

1429.7517

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.81076E-6	1.02286E-7	5.37671E-7	2.71335E-7	-2.25080E-6	-5.47791E-6
e	1.02286E-7	5.77795E-9	3.03703E-8	1.53054E-8	-1.27141E-7	-3.09435E-7
i	5.37671E-7	3.03703E-8	1.60731E-7	9.00894E-8	-6.77425E-7	-1.62654E-6
Ω	2.71335E-7	1.53054E-8	9.00894E-8	1.27185E-7	-4.17515E-7	-8.20624E-7
ω	-2.25080E-6	-1.27141E-7	-6.77425E-7	-4.17515E-7	2.87737E-6	6.80917E-6
M	-5.47791E-6	-3.09435E-7	-1.62654E-6	-8.20624E-7	6.80917E-6	1.65717E-5

Date of computation: 2026-02-01 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

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

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

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	0.0579789	0.0530533	0.0193456
EARTH	1967-12-22 02:25	22.5	0.0212382	0.0210411	0.0001479
EARTH	1979-04-08 03:32	> 1 d	0.0715710	0.0521601	0.0350021
MERCURY	1979-05-24 11:07	> 1 d	0.0408699	0.0003457	0.1046947
EARTH	2006-04-01 08:50	> 1 d	0.1516168	0.0477057	0.0735913
MERCURY	2021-11-24 22:50	> 1 d	0.0272873	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	0.0021192
MARS	2041-11-21 13:04	> 1 d	0.0307268	0.0295327	0.0249210
EARTH	2069-12-10 11:13	> 1 d	0.0891491	0.0316217	0.0964621

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
47.49111119	345.94082689	0.02408877	MINIMUM
311.88368920	97.03747893	0.04317704	MINIMUM
358.81168473	219.58450703	0.75201173	SADDLE
358.83032939	39.60010540	1.24983902	SADDLE
179.93536743	42.02533480	3.71934260	SADDLE
179.92509675	222.01928735	5.71709099	MAXIMUM

Download:

MOID Plots

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