Asteroids

2025YL4 help

Last update: 2025-12-31 13:01 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.751

Aphelion (Q)

1.472

Eccentricity (e)

0.324

Inclination (i)

3.2

deg

Orbit period (P)

428.2

Earth MOID

0.00967

U parameter

7.1

Next Earth close approach

Date

2027-07-11

Nominal distance (from Earth center)

0.12648

18921249

Maximum Brightness

25.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

13 - 28*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-22

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

1.111763

1-sigma variation

0.000192

Unit

Eccentricity (e)

Value

0.324221

1-sigma variation

0.000240

Unit

Inclination (i)

Value

3.1877

1-sigma variation

0.0025

Unit

Long. of Ascending Node (Ω)

Value

90.8615

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

98.2311

1-sigma variation

0.0013

Unit

Mean Anomaly (M)

Value

272.96196

1-sigma variation

0.03319

Unit

Perihelion distance

Value

0.751306

1-sigma variation

Unit

Aphelion distance

Value

1.472221

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.059844

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.067385

1-sigma variation

Unit

MOID

Value

0.009671

1-sigma variation

Unit

Orbit Period

Value

428.1706

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.67337E-8	4.59132E-8	4.80518E-7	7.91880E-8	2.55254E-7	6.36049E-6
e	4.59132E-8	5.73875E-8	6.00587E-7	9.89704E-8	3.19147E-7	7.94994E-6
i	4.80518E-7	6.00587E-7	6.28733E-6	1.03702E-6	3.33758E-6	8.32015E-5
Ω	7.91880E-8	9.89704E-8	1.03702E-6	1.72312E-7	5.48242E-7	1.37112E-5
ω	2.55254E-7	3.19147E-7	3.33758E-6	5.48242E-7	1.78881E-6	4.41980E-5
M	6.36049E-6	7.94994E-6	8.32015E-5	1.37112E-5	4.41980E-5	1.10133E-3

Date of computation: 2025-12-31 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

26.601

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

13 - 28*

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

0.544268

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-22.334165

Unit

Source

[2]

Last Observation

Value

2025-12-30.855527

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

37 (1)

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 2025YL4 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	1952-01-04 18:49	> 1 mo	0.0525111	0.0087765	0.6676507
EARTH	1953-07-13 23:51	> 1 w	0.1932438	0.0123989	0.6944454
EARTH	1973-06-30 04:27	> 1 w	0.0621276	0.0124135	0.2523649
EARTH	1979-01-02 14:39	> 1 w	0.0232994	0.0091770	0.1513626
EARTH	1980-07-12 07:20	> 1 d	0.1676934	0.0120854	0.1565127
EARTH	1998-12-26 23:49	837.1	0.1128437	0.0839465	0.0096466
EARTH	2000-07-05 20:03	> 1 d	0.0361169	0.0114758	0.0238356
VENUS	2020-04-20 07:47	> 1 d	0.0354516	0.0216950	0.0046751
EARTH	2020-06-28 23:33	1189.6	0.0758171	0.0471447	0.0096389
EARTH	2026-01-01 15:43	< 1 min	0.0096932	0.0096715	0.0000072
EARTH	2027-07-11 22:02	89.9	0.1264807	0.1223522	0.0013764
EARTH	2033-02-10 22:09	> 1 d	0.1913377	0.1727154	0.0062087
EARTH	2052-12-24 23:27	312.4	0.1599750	0.1398016	0.0067257
EARTH	2054-07-04 01:27	302.2	0.0213580	0.0146351	0.0025641
VENUS	2057-10-24 17:03	> 1 d	0.0495697	0.0311780	0.0061317
EARTH	2060-01-02 07:15	1057.6	0.0108075	0.0095855	0.0053965
EARTH	2061-07-11 11:53	> 1 d	0.1298489	0.0137054	0.0495621
EARTH	2067-02-11 11:23	> 1 mo	0.1916628	0.0124807	0.1041862
MARS	2067-08-18 12:28	> 1 w	0.0326808	0.0243744	0.0755574
VENUS	2082-06-18 06:52	> 1 mo	0.0325116	0.0118265	0.1534632
EARTH	2086-12-25 06:43	> 1 mo	0.1626814	0.0093253	1.1868955
EARTH	2088-07-03 10:55	> 1 mo	0.0223410	0.0119327	1.1303888
EARTH	2094-01-03 22:04	> 1 d	0.0432038	0.0123258	0.1690397
EARTH	2095-07-14 02:53	> 1 w	0.1724637	0.0136489	0.2482024
MARS	2096-01-20 23:12	> 1 w	0.0483811	0.0417790	0.0795930
EARTH	2115-05-25 02:08	> 1 mo	0.1950514	0.0465443	1.9596784
VENUS	2120-01-01 04:00	> 1 mo	0.0386866	0.0075311	2.5822351
EARTH	2120-12-27 19:01	> 1 mo	0.1188870	0.0097288	4.0827907
EARTH	2122-07-07 11:49	> 1 mo	0.0266988	0.0120984	3.6256936

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
290.58413345	359.53293502	0.00968027	MINIMUM
74.59799006	181.49487667	0.01192617	MINIMUM
3.43302408	91.29374951	0.25391265	SADDLE
181.77170497	269.74402017	0.47649939	SADDLE
3.78324172	271.78623361	1.75125923	SADDLE
182.00082396	89.90788220	2.47233178	MAXIMUM

Download:

MOID Plots

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