Asteroids

2023GC2 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.857

Aphelion (Q)

1.152

Eccentricity (e)

0.147

Inclination (i)

6.9

deg

Orbit period (P)

367.5

Earth MOID

0.01243

U parameter

3.1

Next Earth close approach

Date

2026-04-05

Nominal distance (from Earth center)

0.08228

12308501

Maximum Brightness

24.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.1

mag

Diameter

10 - 22*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-04-14

Observatory

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.004170

1-sigma variation

4.102E-7

Unit

Eccentricity (e)

Value

0.146736

1-sigma variation

0.000010

Unit

Inclination (i)

Value

6.9045

1-sigma variation

0.0005

Unit

Long. of Ascending Node (Ω)

Value

198.8380

1-sigma variation

4.365E-5

Unit

Arg. of Perihelion (ω)

Value

255.0123

1-sigma variation

0.0007

Unit

Mean Anomaly (M)

Value

307.25450

1-sigma variation

0.00016

Unit

Perihelion distance

Value

0.856822

1-sigma variation

Unit

Aphelion distance

Value

1.151517

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.018507

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.051689

1-sigma variation

Unit

MOID

Value

0.012435

1-sigma variation

Unit

Orbit Period

Value

367.5438

1-sigma variation

Unit

U parameter

Value

3.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.68294E-13	-4.02502E-12	-1.88875E-10	1.55168E-11	2.75170E-10	5.40682E-11
e	-4.02502E-12	9.65744E-11	4.51407E-9	-3.72949E-10	-6.56997E-9	-1.34010E-9
i	-1.88875E-10	4.51407E-9	2.12134E-7	-1.71849E-8	-3.08865E-7	-6.04723E-8
Ω	1.55168E-11	-3.72949E-10	-1.71849E-8	1.90535E-9	2.53978E-8	4.72685E-9
ω	2.75170E-10	-6.56997E-9	-3.08865E-7	2.53978E-8	4.50414E-7	8.65291E-8
M	5.40682E-11	-1.34010E-9	-6.04723E-8	4.72685E-9	8.65291E-8	2.51990E-8

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

27.15

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

10 - 22*

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

369

Unit

Source

[1]

Unobserved

Value

522

Unit

Source

[1]

Normalized RMS of residuals

Value

0.771181

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-04-14.25185

Unit

Source

[2]

Last Observation

Value

2024-04-17.424194

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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 2023GC2 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	2019-04-10 02:23	< 1 min	0.1886930	0.1886576	0.0000118
EARTH	2020-04-07 10:22	< 1 min	0.1371170	0.1370913	0.0000085
EARTH	2021-04-06 00:14	< 1 min	0.0894551	0.0894396	0.0000052
EARTH	2022-04-05 02:50	< 1 min	0.0489871	0.0489821	0.0000017
EARTH	2023-04-04 21:10	< 1 min	0.0237085	0.0237047	0.0000013
EARTH	2024-04-04 00:26	< 1 min	0.0220622	0.0220591	0.0000011
EARTH	2025-04-04 14:09	< 1 min	0.0442002	0.0441931	0.0000024
EARTH	2026-04-05 20:34	< 1 min	0.0822772	0.0822582	0.0000063
EARTH	2027-04-07 14:14	< 1 min	0.1288333	0.1288031	0.0000101
EARTH	2028-04-08 21:08	< 1 min	0.1797676	0.1797268	0.0000136
EARTH	2121-09-17 20:26	14.4	0.1826984	0.1820375	0.0002203
EARTH	2122-09-21 04:05	16.6	0.1331032	0.1324839	0.0002065
EARTH	2123-09-24 16:42	18.9	0.0880958	0.0875568	0.0001797
EARTH	2124-09-27 02:32	20.0	0.0527178	0.0523462	0.0001242
EARTH	2125-09-30 04:25	16.7	0.0350855	0.0349761	0.0000369

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
91.94379403	91.06879125	0.01316689	MINIMUM
280.64086437	264.87174695	0.03603415	MINIMUM
6.13818446	358.68256373	0.16707795	SADDLE
186.34359985	176.96072689	0.18579806	SADDLE
359.63807683	171.24449125	1.86959499	SADDLE
178.34770877	349.92190463	2.13179783	MAXIMUM

Download:

MOID Plots

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