Asteroids

2025YC3 help

Last update: 2025-12-28 13:16 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.704

Aphelion (Q)

1.003

Eccentricity (e)

0.175

Inclination (i)

23.6

deg

Orbit period (P)

287.9

Earth MOID

0.00521

U parameter

5.0

Next Earth close approach

Date

2040-12-22

Nominal distance (from Earth center)

0.00539

805846

Maximum Brightness

17.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

70 - 150*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-20

Observatory

ATLAS-MLO, Mauna Loa

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

0.853373

1-sigma variation

0.000003

Unit

Eccentricity (e)

Value

0.174887

1-sigma variation

0.000096

Unit

Inclination (i)

Value

23.6385

1-sigma variation

0.0549

Unit

Long. of Ascending Node (Ω)

Value

270.7909

1-sigma variation

0.0034

Unit

Arg. of Perihelion (ω)

Value

332.0892

1-sigma variation

0.0432

Unit

Mean Anomaly (M)

Value

176.87502

1-sigma variation

0.06404

Unit

Perihelion distance

Value

0.704129

1-sigma variation

Unit

Aphelion distance

Value

1.002617

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.301319

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.005345

1-sigma variation

Unit

MOID

Value

0.005206

1-sigma variation

Unit

Orbit Period

Value

287.9433

1-sigma variation

Unit

U parameter

Value

5.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.31408E-12	-2.49520E-10	-1.41579E-7	8.88975E-9	1.10783E-7	-1.64381E-7
e	-2.49520E-10	9.13388E-9	5.24729E-6	-3.29188E-7	-4.12627E-6	6.11847E-6
i	-1.41579E-7	5.24729E-6	3.01579E-3	-1.89190E-4	-2.37186E-3	3.51694E-3
Ω	8.88975E-9	-3.29188E-7	-1.89190E-4	1.18685E-5	1.48792E-4	-2.20626E-4
ω	1.10783E-7	-4.12627E-6	-2.37186E-3	1.48792E-4	1.86557E-3	-2.76619E-3
M	-1.64381E-7	6.11847E-6	3.51694E-3	-2.20626E-4	-2.76619E-3	4.10162E-3

Date of computation: 2025-12-28 13:16 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

23.041

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

70 - 150*

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

0.56598

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-19.158478

Unit

Source

[2]

Last Observation

Value

2025-12-27.436231

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

34 (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 2025YC3 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	1950-12-21 12:00	62.6	0.1874420	0.1838005	0.0012141
EARTH	1954-12-21 22:56	25.8	0.0985147	0.0977370	0.0002592
EARTH	1969-12-22 01:32	33.2	0.0661699	0.0550303	0.0037136
EARTH	1984-12-21 19:26	37.1	0.0758491	0.0637321	0.0040392
VENUS	1993-12-30 09:15	105.1	0.0148252	0.0127564	0.0008774
EARTH	1999-12-22 01:07	12.4	0.1125478	0.1072125	0.0017785
EARTH	2010-12-22 15:55	6.4	0.1089166	0.1051084	0.0012694
VENUS	2024-10-02 09:26	31.6	0.0311984	0.0297191	0.0004945
EARTH	2025-12-22 16:13	< 1 min	0.0247331	0.0245718	0.0000538
EARTH	2040-12-22 09:10	8.8	0.0053867	0.0052351	0.0001621
EARTH	2051-12-22 05:06	748.6	0.1868685	0.0500024	0.0463663
VENUS	2055-07-07 07:09	> 1 d	0.0318690	0.0112512	0.0697147
EARTH	2055-12-21 10:13	1021.8	0.1571386	0.0014498	0.0578390
EARTH	2066-12-22 21:46	97.5	0.0075656	0.0013245	0.0027628
EARTH	2077-12-22 11:49	271.8	0.0373773	0.0001271	0.0138084
VENUS	2083-10-24 19:01	781.3	0.0272951	0.0178404	0.0082528
EARTH	2088-12-20 20:18	234.5	0.1505328	0.1487977	0.0005999
EARTH	2095-12-22 10:15	61.0	0.1797206	0.1437941	0.0120446
EARTH	2106-12-24 01:50	33.8	0.0667733	0.0002934	0.0248475
VENUS	2115-03-10 13:15	> 1 d	0.0437109	0.0122530	0.0253670
EARTH	2117-12-23 14:37	54.2	0.0296507	0.0086005	0.0167362
VENUS	2123-10-23 00:29	1386.0	0.0208346	0.0142251	0.0131976

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
212.84265083	349.51828313	0.00520591	MINIMUM
31.73024833	178.20924881	0.29728445	MINIMUM
105.70897339	257.69160455	0.40323506	SADDLE
315.28156074	88.71988621	0.43105531	SADDLE
350.06422654	311.09862041	1.68179782	SADDLE
190.64924458	152.47115804	2.01187700	MAXIMUM

Download:

MOID Plots

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