Asteroids

2025CJ4 help

Last update: 2025-02-22 05:33 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.392

Aphelion (Q)

0.992

Eccentricity (e)

0.433

Inclination (i)

20.9

deg

Orbit period (P)

210.4

Earth MOID

0.00223

U parameter

6.8

Next Earth close approach

Date

2029-02-07

Nominal distance (from Earth center)

0.14438

21599237

Maximum Brightness

25.4

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

26.1

mag

Diameter

16 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-02-14

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.692387

1-sigma variation

0.000036

Unit

Eccentricity (e)

Value

0.433144

1-sigma variation

0.000076

Unit

Inclination (i)

Value

20.9224

1-sigma variation

0.0075

Unit

Long. of Ascending Node (Ω)

Value

145.3731

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

184.2700

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

307.37472

1-sigma variation

0.00978

Unit

Perihelion distance

Value

0.392484

1-sigma variation

Unit

Aphelion distance

Value

0.992290

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002251

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.618951

1-sigma variation

Unit

MOID

Value

0.002229

1-sigma variation

Unit

Orbit Period

Value

210.4368

1-sigma variation

Unit

U parameter

Value

6.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.30537E-9	-2.76275E-9	-2.69841E-7	-3.47519E-9	7.78401E-9	-3.53132E-7
e	-2.76275E-9	5.84723E-9	5.71123E-7	7.35565E-9	-1.64603E-8	7.47350E-7
i	-2.69841E-7	5.71123E-7	5.58188E-5	7.19466E-7	-1.59487E-6	7.29630E-5
Ω	-3.47519E-9	7.35565E-9	7.19466E-7	9.28681E-9	-2.02746E-8	9.39013E-7
ω	7.78401E-9	-1.64603E-8	-1.59487E-6	-2.02746E-8	5.76367E-8	-2.13238E-6
M	-3.53132E-7	7.47350E-7	7.29630E-5	9.39013E-7	-2.13238E-6	9.55931E-5

Date of computation: 2025-02-19 15:19 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

26.102

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

16 - 40*

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

[-]

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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

0.837515

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-02-14.503987

Unit

Source

[2]

Last Observation

Value

2025-02-15.793856

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

57 (3)

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 2025CJ4 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1955-02-23 15:03	685.1	0.1368305	0.1015328	0.0120260
EARTH	1959-02-08 15:01	179.2	0.1130469	0.1000687	0.0043433
MERCURY	1961-10-11 12:54	122.4	0.0273983	0.0238014	0.0014624
EARTH	1966-02-19 20:08	880.0	0.0748739	0.0481775	0.0090636
EARTH	1970-02-07 09:02	89.8	0.1807667	0.1245040	0.0190294
EARTH	1977-02-15 17:36	> 1 d	0.0225751	0.0040962	0.0268073
MERCURY	1980-04-28 08:23	> 1 d	0.0239498	0.0184858	0.0256976
MERCURY	1983-03-21 19:00	871.5	0.0463062	0.0183993	0.0192277
EARTH	1988-02-15 17:03	601.4	0.0122266	0.0030796	0.0053957
EARTH	1999-02-20 05:51	574.5	0.0750529	0.0578776	0.0057846
EARTH	2003-02-08 08:29	178.4	0.1267448	0.1083348	0.0061670
EARTH	2010-02-24 01:38	249.3	0.1467359	0.1329843	0.0046165
EARTH	2014-02-11 02:05	298.8	0.0504708	0.0390230	0.0038340
EARTH	2025-02-14 10:21	< 1 s	0.0047010	0.0046972	0.0000013
EARTH	2029-02-07 11:07	36.4	0.1443820	0.1397899	0.0015324
MERCURY	2032-05-06 10:13	346.8	0.0284770	0.0164200	0.0047909
EARTH	2040-02-21 04:39	428.9	0.0829492	0.0693403	0.0045705
EARTH	2044-02-11 10:29	453.5	0.0528348	0.0357378	0.0057473
MERCURY	2045-08-06 16:37	594.8	0.0342375	0.0139680	0.0124171
EARTH	2055-02-25 00:22	228.2	0.1604888	0.1443622	0.0054157
EARTH	2059-02-15 23:31	517.2	0.0169500	0.0041453	0.0046082
MERCURY	2061-09-24 11:09	117.9	0.0148349	0.0132228	0.0008390
EARTH	2063-02-08 19:45	26.8	0.1100799	0.1064579	0.0012081
EARTH	2074-02-24 18:15	774.7	0.1571326	0.1089549	0.0166146
EARTH	2078-02-17 00:10	> 1 d	0.0327261	0.0057223	0.0200367
EARTH	2082-02-09 14:29	1161.8	0.0821003	0.0248770	0.0202937
MERCURY	2095-09-08 17:05	1140.0	0.0397859	0.0105433	0.0154813
EARTH	2097-02-20 16:03	526.8	0.0837168	0.0675592	0.0054348
EARTH	2101-02-13 07:44	107.7	0.0277475	0.0242999	0.0011526
EARTH	2105-02-08 12:20	46.6	0.1657888	0.1526793	0.0043805
MERCURY	2106-01-18 11:01	670.7	0.0189524	0.0137401	0.0079187
EARTH	2116-02-23 18:05	1386.3	0.1036019	0.0561531	0.0165885
EARTH	2120-02-14 17:28	> 1 d	0.0187010	0.0032844	0.0203256
EARTH	2124-02-09 07:39	53.3	0.1747419	0.1622763	0.0041689

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
173.12533111	42.45119253	0.00222896	MINIMUM
355.77975107	222.48605653	0.61889359	SADDLE
356.62926840	43.74631231	1.38095112	SADDLE
178.25314629	225.41744361	2.00335416	MAXIMUM

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MOID Plots

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