Asteroids

2023WC help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

1.002

Aphelion (Q)

1.181

Eccentricity (e)

0.082

Inclination (i)

17.0

deg

Orbit period (P)

416.5

Earth MOID

0.02842

U parameter

7.0

Next Earth close approach

Date

2031-11-13

Nominal distance (from Earth center)

0.12998

19445331

Maximum Brightness

23.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.1

mag

Diameter

26 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-11-16

Observatory

ATLAS Chile, Rio Hurtado

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

1.091479

1-sigma variation

0.000158

Unit

Eccentricity (e)

Value

0.082235

1-sigma variation

0.000108

Unit

Inclination (i)

Value

17.0291

1-sigma variation

0.0124

Unit

Long. of Ascending Node (Ω)

Value

232.5593

1-sigma variation

0.0007

Unit

Arg. of Perihelion (ω)

Value

217.7435

1-sigma variation

0.0333

Unit

Mean Anomaly (M)

Value

245.00921

1-sigma variation

0.10296

Unit

Perihelion distance

Value

1.001721

1-sigma variation

Unit

Aphelion distance

Value

1.181237

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.147412

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.028625

1-sigma variation

Unit

MOID

Value

0.028415

1-sigma variation

Unit

Orbit Period

Value

416.5061

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.49369E-8	1.70064E-8	1.96388E-6	1.02744E-7	-5.20381E-6	-1.62478E-5
e	1.70064E-8	1.16058E-8	1.34043E-6	7.00673E-8	-3.53586E-6	-1.10914E-5
i	1.96388E-6	1.34043E-6	1.54877E-4	8.09403E-6	-4.07855E-4	-1.28120E-3
Ω	1.02744E-7	7.00673E-8	8.09403E-6	4.23534E-7	-2.14383E-5	-6.69452E-5
ω	-5.20381E-6	-3.53586E-6	-4.07855E-4	-2.14383E-5	1.10785E-3	3.37243E-3
M	-1.62478E-5	-1.10914E-5	-1.28120E-3	-6.69452E-5	3.37243E-3	1.06013E-2

Date of computation: 2025-09-10 00:30 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

25.075

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

26 - 60*

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

665

Unit

Source

[1]

Normalized RMS of residuals

Value

0.602973

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-11-16.276401

Unit

Source

[2]

Last Observation

Value

2023-11-20.28032

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

29 (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

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 2023WC 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	1950-11-18 02:20	96.9	0.1323052	0.1171078	0.0050828
EARTH	1958-11-16 03:33	211.4	0.0318730	0.0278475	0.0034555
EARTH	1966-11-14 20:34	684.7	0.0534918	0.0277957	0.0182886
EARTH	1974-11-12 04:14	725.1	0.1588445	0.0898212	0.0232750
EARTH	1975-05-03 19:16	> 1 d	0.1589251	0.1510961	0.0065478
EARTH	1983-05-12 18:05	> 1 d	0.1500772	0.1478827	0.0034516
EARTH	1991-05-23 07:11	> 1 d	0.1935419	0.1713427	0.0098450
EARTH	2007-11-18 23:44	160.4	0.1838695	0.1352434	0.0162922
EARTH	2015-11-17 07:31	262.5	0.0672581	0.0400221	0.0098866
EARTH	2023-11-15 21:47	< 1 min	0.0307891	0.0307203	0.0000229
EARTH	2031-11-13 07:20	342.8	0.1299840	0.0982777	0.0106539
EARTH	2032-05-01 09:14	1350.7	0.1661727	0.1561636	0.0041701
EARTH	2040-05-10 18:04	> 1 d	0.1472240	0.1465300	0.0017328
EARTH	2048-05-21 20:13	> 1 d	0.1896821	0.1657884	0.0125221
EARTH	2064-11-18 03:29	427.9	0.1759651	0.0587925	0.0403730
EARTH	2072-11-16 08:17	1024.4	0.0533356	0.0283513	0.0337737
EARTH	2080-11-14 21:43	588.6	0.0404204	0.0284506	0.0134157
EARTH	2088-11-11 20:55	79.6	0.1603464	0.1513866	0.0029895
EARTH	2089-05-04 00:51	621.7	0.1549043	0.1506446	0.0015324
EARTH	2097-05-14 06:56	> 1 d	0.1542260	0.1494237	0.0056592
EARTH	2121-11-18 17:14	1355.4	0.1176212	0.0292128	0.0761412

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
325.71427257	311.65944944	0.02839724	MINIMUM
134.39774344	125.25478343	0.14710811	MINIMUM
52.31687723	43.71830437	0.30285192	SADDLE
229.06092008	213.80478251	0.34564991	SADDLE
15.70878853	183.79848244	2.00662049	SADDLE
165.44369575	333.32825682	2.15978550	MAXIMUM

Download:

MOID Plots

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