Asteroids

2025CJ1 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.973

Aphelion (Q)

1.658

Eccentricity (e)

0.261

Inclination (i)

7.7

deg

Orbit period (P)

551.0

Earth MOID

0.00852

U parameter

6.7

Next Earth close approach

Date

2028-02-17

Nominal distance (from Earth center)

0.10489

15691642

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.2

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-02-04

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

1.315317

1-sigma variation

0.000158

Unit

Eccentricity (e)

Value

0.260612

1-sigma variation

0.000091

Unit

Inclination (i)

Value

7.7394

1-sigma variation

0.0023

Unit

Long. of Ascending Node (Ω)

Value

315.1421

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

152.4265

1-sigma variation

0.0007

Unit

Mean Anomaly (M)

Value

336.01909

1-sigma variation

0.06118

Unit

Perihelion distance

Value

0.972530

1-sigma variation

Unit

Aphelion distance

Value

1.658103

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.579830

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.010149

1-sigma variation

Unit

MOID

Value

0.008519

1-sigma variation

Unit

Orbit Period

Value

550.9903

1-sigma variation

Unit

U parameter

Value

6.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.48819E-8	1.43759E-8	3.62456E-7	1.29147E-8	1.63870E-8	-9.65053E-6
e	1.43759E-8	8.30730E-9	2.09341E-7	7.46633E-9	8.60306E-9	-5.57530E-6
i	3.62456E-7	2.09341E-7	5.28585E-6	1.88012E-7	2.84053E-7	-1.40604E-4
Ω	1.29147E-8	7.46633E-9	1.88012E-7	6.74325E-9	5.53309E-9	-5.00745E-6
ω	1.63870E-8	8.60306E-9	2.84053E-7	5.53309E-9	5.58173E-7	-6.64482E-6
M	-9.65053E-6	-5.57530E-6	-1.40604E-4	-5.00745E-6	-6.64482E-6	3.74315E-3

Date of computation: 2026-06-04 23:11 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

28.211

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

6 - 14*

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

487

Unit

Source

[1]

Normalized RMS of residuals

Value

0.755581

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-02-04.29708

Unit

Source

[2]

Last Observation

Value

2025-02-06.284171

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

55 (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

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 2025CJ1 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	1951-02-02 09:03	> 1 d	0.0095486	0.0093982	0.0056118
EARTH	1954-02-06 23:51	> 1 d	0.0285111	0.0077770	0.0231182
EARTH	1957-02-18 17:00	> 1 d	0.1356934	0.0444480	0.0304951
EARTH	2018-12-10 12:38	1206.4	0.1456977	0.1329922	0.0043867
EARTH	2022-01-13 12:17	1341.0	0.0687849	0.0609011	0.0026409
EARTH	2025-02-02 06:33	< 1 min	0.0084730	0.0084648	0.0000027
EARTH	2028-02-17 02:18	412.9	0.1048921	0.0947730	0.0033733
EARTH	2086-12-02 23:34	> 1 d	0.1886230	0.1142527	0.0314738
EARTH	2089-12-31 19:30	> 1 w	0.0987956	0.0504265	0.0259011
EARTH	2093-01-29 14:39	> 1 d	0.0187024	0.0065863	0.0240864
EARTH	2096-02-01 04:06	> 1 w	0.0114964	0.0073618	0.0491006
EARTH	2099-01-01 23:51	> 1 w	0.0994779	0.0448637	0.0550658
EARTH	2101-12-02 13:42	> 1 w	0.1990744	0.1161265	0.0527299

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
19.77159291	28.36676367	0.00851940	MINIMUM
177.43399611	181.43759442	0.64670193	SADDLE
359.33087867	182.46598217	1.98835923	SADDLE
180.72659763	3.97084517	2.64046433	MAXIMUM

Download:

MOID Plots

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