Asteroids

2023JC4 help

Last update: 2026-07-30 14:25 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.684

Aphelion (Q)

1.057

Eccentricity (e)

0.214

Inclination (i)

2.4

deg

Orbit period (P)

296.9

Earth MOID

0.00559

U parameter

6.6

Next Earth close approach

Date

2036-05-10

Nominal distance (from Earth center)

0.05273

7888244

Maximum Brightness

20.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.3

mag

Diameter

23 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-05-14

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

0.870882

1-sigma variation

0.000046

Unit

Eccentricity (e)

Value

0.214165

1-sigma variation

0.000096

Unit

Inclination (i)

Value

2.3823

1-sigma variation

0.0012

Unit

Long. of Ascending Node (Ω)

Value

190.2633

1-sigma variation

0.0049

Unit

Arg. of Perihelion (ω)

Value

211.1542

1-sigma variation

0.0059

Unit

Mean Anomaly (M)

Value

118.42088

1-sigma variation

0.11523

Unit

Perihelion distance

Value

0.684370

1-sigma variation

Unit

Aphelion distance

Value

1.057394

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.018846

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.298922

1-sigma variation

Unit

MOID

Value

0.005591

1-sigma variation

Unit

Orbit Period

Value

296.8501

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.12372E-9	-4.43059E-9	-5.75292E-8	-2.25178E-7	2.71826E-7	-5.31008E-6
e	-4.43059E-9	9.24333E-9	1.20018E-7	4.69707E-7	-5.67048E-7	1.10781E-5
i	-5.75292E-8	1.20018E-7	1.55854E-6	6.10380E-6	-7.36682E-6	1.43843E-4
Ω	-2.25178E-7	4.69707E-7	6.10380E-6	2.40080E-5	-2.89282E-5	5.62986E-4
ω	2.71826E-7	-5.67048E-7	-7.36682E-6	-2.89282E-5	3.48809E-5	-6.79636E-4
M	-5.31008E-6	1.10781E-5	1.43843E-4	5.62986E-4	-6.79636E-4	1.32772E-2

Date of computation: 2026-07-30 14:25 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

25.291

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

23 - 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

[-]

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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

1244

Unit

Source

[1]

Normalized RMS of residuals

Value

0.534025

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-05-13.559374

Unit

Source

[2]

Last Observation

Value

2023-06-01.29814

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

56 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2023JC4 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	1954-06-06 23:47	> 1 d	0.1749907	0.0283063	0.2065297
VENUS	1957-12-25 08:52	> 1 mo	0.0293794	0.0291226	0.0173117
EARTH	1958-04-07 04:08	> 1 mo	0.0380212	0.0163487	0.0649319
EARTH	1971-06-07 18:23	168.7	0.0804721	0.0248962	0.0185441
EARTH	1975-03-23 03:36	> 1 d	0.0123653	0.0087201	0.0211051
VENUS	1975-09-19 21:06	> 1 w	0.0469685	0.0461290	0.0063020
EARTH	1984-06-08 05:04	> 1 d	0.0749215	0.0379332	0.0709926
EARTH	1988-03-19 23:06	> 1 d	0.1052640	0.0103584	0.0790740
EARTH	1997-06-03 12:40	> 1 d	0.0370813	0.0370456	0.0006606
VENUS	1998-07-29 20:21	> 1 d	0.0307537	0.0302384	0.0024352
EARTH	2001-03-22 02:06	473.0	0.1876848	0.1485088	0.0130643
EARTH	2010-05-30 17:05	> 1 d	0.0387945	0.0372153	0.0009768
EARTH	2014-03-21 23:00	113.1	0.1763654	0.1659725	0.0034646
VENUS	2021-04-12 18:50	693.4	0.0422854	0.0422647	0.0000233
EARTH	2023-01-30 13:08	28.4	0.1928481	0.1925690	0.0000930
EARTH	2023-05-24 08:17	< 1 min	0.0453385	0.0452735	0.0000216
EARTH	2036-05-10 19:18	> 1 d	0.0527297	0.0504348	0.0008755
VENUS	2044-01-21 22:26	> 1 d	0.0395659	0.0378931	0.0011003
EARTH	2049-04-07 15:13	1122.3	0.0401784	0.0369008	0.0010963
EARTH	2062-04-22 22:13	> 1 d	0.0526961	0.0474606	0.0019535
VENUS	2064-05-30 03:01	> 1 d	0.0293670	0.0293602	0.0002606
EARTH	2075-05-14 03:47	> 1 w	0.0507941	0.0435308	0.0113431
VENUS	2084-09-11 20:43	> 1 w	0.0312964	0.0302094	0.0132457
EARTH	2088-05-29 22:30	> 1 w	0.0380377	0.0373601	0.0118259
EARTH	2092-03-18 18:33	> 1 d	0.1388559	0.0053176	0.1590803
EARTH	2101-06-07 18:52	953.3	0.1004282	0.0384202	0.2609221
VENUS	2104-11-28 01:56	> 1 mo	0.0447184	0.0446600	0.0097708
EARTH	2105-03-19 15:57	> 1 w	0.0414428	0.0034477	0.2101698
EARTH	2114-06-08 15:22	> 1 d	0.0983154	0.0393892	0.4713843
EARTH	2118-03-19 17:44	> 1 d	0.0620704	0.0042049	0.7218453

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
133.00580756	77.53076381	0.00559124	MINIMUM
217.57789326	147.09282414	0.03744237	MINIMUM
180.35686719	116.46605488	0.05456158	SADDLE
354.66337296	291.65381563	0.30922754	SADDLE
354.12081354	111.00178999	1.69114442	SADDLE
176.14072277	293.06360597	2.05029361	MAXIMUM

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MOID Plots

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