Asteroids

2025YZ help

Last update: 2025-12-22 13:01 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.952

Aphelion (Q)

2.137

Eccentricity (e)

0.384

Inclination (i)

3.7

deg

Orbit period (P)

701.4

Earth MOID

0.03507

U parameter

8.1

Next Earth close approach

Date

2049-03-15

Nominal distance (from Earth center)

0.08162

12209611

Maximum Brightness

22.5

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

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

1.544884

1-sigma variation

0.001709

Unit

Eccentricity (e)

Value

0.383581

1-sigma variation

0.000714

Unit

Inclination (i)

Value

3.7403

1-sigma variation

0.0065

Unit

Long. of Ascending Node (Ω)

Value

68.3753

1-sigma variation

0.0021

Unit

Arg. of Perihelion (ω)

Value

63.1571

1-sigma variation

0.0059

Unit

Mean Anomaly (M)

Value

325.47087

1-sigma variation

0.05910

Unit

Perihelion distance

Value

0.952296

1-sigma variation

Unit

Aphelion distance

Value

2.137473

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.137084

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.577771

1-sigma variation

Unit

MOID

Value

0.035069

1-sigma variation

Unit

Orbit Period

Value

701.3623

1-sigma variation

Unit

U parameter

Value

8.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.91993E-6	1.22075E-6	1.10728E-5	-2.68890E-6	9.72429E-6	1.00990E-4
e	1.22075E-6	5.10369E-7	4.62799E-6	-1.12761E-6	4.06946E-6	4.22214E-5
i	1.10728E-5	4.62799E-6	4.22733E-5	-9.42962E-6	3.60207E-5	3.82924E-4
Ω	-2.68890E-6	-1.12761E-6	-9.42962E-6	4.56321E-6	-1.12898E-5	-9.31177E-5
ω	9.72429E-6	4.06946E-6	3.60207E-5	-1.12898E-5	3.50542E-5	3.36439E-4
M	1.00990E-4	4.22214E-5	3.82924E-4	-9.31177E-5	3.36439E-4	3.49290E-3

Date of computation: 2025-12-22 13:01 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

0.465679

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-17.19662

Unit

Source

[2]

Last Observation

Value

2025-12-22.352806

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

42 (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 2025YZ 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	1955-01-08 04:08	> 1 d	0.0438081	0.0309829	0.0108228
MARS	1966-04-12 14:42	> 1 d	0.0452121	0.0436822	0.0147895
EARTH	1978-02-16 00:27	> 1 mo	0.0674513	0.0667206	0.0070911
MARS	1995-09-15 10:16	> 1 w	0.0372356	0.0223564	0.1430305
EARTH	2001-03-17 15:45	> 1 w	0.0984154	0.0651253	0.1752589
EARTH	2026-01-02 05:28	< 1 min	0.0361838	0.0359912	0.0000642
EARTH	2049-03-15 04:18	> 1 mo	0.0816162	0.0642630	0.1352816
EARTH	2074-02-06 01:23	> 1 mo	0.0672302	0.0611367	0.0227397
EARTH	2099-01-02 19:17	> 1 w	0.0370082	0.0362739	0.0145846
EARTH	2122-03-28 09:55	> 1 mo	0.1733718	0.0627399	0.5836268
EARTH	2123-12-17 23:11	> 1 mo	0.1330995	0.0317260	0.6260802

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
338.12166033	357.91079926	0.03506866	MINIMUM
21.15387265	60.62547957	0.06458240	MINIMUM
7.19402379	40.28799538	0.06828070	SADDLE
180.79216045	210.94612475	1.12504410	SADDLE
1.45806268	211.80329700	1.96710393	SADDLE
180.48880969	30.73483921	3.12221862	MAXIMUM

Download:

MOID Plots

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