Asteroids

2023HG help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.931

Aphelion (Q)

2.271

Eccentricity (e)

0.418

Inclination (i)

4.7

deg

Orbit period (P)

740.2

Earth MOID

0.00391

U parameter

9.0

Next Earth close approach

Date

2027-04-28

Nominal distance (from Earth center)

0.15974

23897333

Maximum Brightness

25.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

11 - 24*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-04-16

Observatory

Catalina Sky 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

1.601387

1-sigma variation

0.008566

Unit

Eccentricity (e)

Value

0.418335

1-sigma variation

0.003445

Unit

Inclination (i)

Value

4.6614

1-sigma variation

0.4037

Unit

Long. of Ascending Node (Ω)

Value

197.3937

1-sigma variation

0.2183

Unit

Arg. of Perihelion (ω)

Value

322.2363

1-sigma variation

0.1623

Unit

Mean Anomaly (M)

Value

125.13116

1-sigma variation

0.63012

Unit

Perihelion distance

Value

0.931472

1-sigma variation

Unit

Aphelion distance

Value

2.271303

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.009533

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.975004

1-sigma variation

Unit

MOID

Value

0.003909

1-sigma variation

Unit

Orbit Period

Value

740.1897

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.33771E-5	2.95118E-5	-3.45829E-3	-1.86971E-3	1.38988E-3	-5.39762E-3
e	2.95118E-5	1.18695E-5	-1.39090E-3	-7.51984E-4	5.58999E-4	-2.17089E-3
i	-3.45829E-3	-1.39090E-3	1.62990E-1	8.81198E-2	-6.55055E-2	2.54392E-1
Ω	-1.86971E-3	-7.51984E-4	8.81198E-2	4.76416E-2	-3.54154E-2	1.37536E-1
ω	1.38988E-3	5.58999E-4	-6.55055E-2	-3.54154E-2	2.63274E-2	-1.02240E-1
M	-5.39762E-3	-2.17089E-3	2.54392E-1	1.37536E-1	-1.02240E-1	3.97049E-1

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

27.011

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

11 - 24*

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

929

Unit

Source

[1]

Normalized RMS of residuals

Value

0.738244

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-04-16.332231

Unit

Source

[2]

Last Observation

Value

2023-04-24.225437

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

31 (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

Close Approaches for 2023HG 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	2019-04-30 18:32	> 1 d	0.1991110	0.1265027	0.0242366
EARTH	2021-04-22 04:12	> 1 d	0.0947725	0.0565857	0.0127596
EARTH	2023-04-12 20:10	< 1 min	0.0148670	0.0148236	0.0000145
EARTH	2025-04-10 09:25	> 1 d	0.0054119	0.0032692	0.0090271
EARTH	2027-04-28 07:48	> 1 d	0.1597438	0.0139002	0.0868199
EARTH	2094-01-23 21:18	> 1 mo	0.0797263	0.0756706	0.7638804
EARTH	2096-03-09 02:55	> 1 mo	0.0706842	0.0497645	0.7873102
EARTH	2098-04-15 10:08	> 1 mo	0.0290477	0.0056117	2.5228586

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
26.22429481	96.42885677	0.00338765	MINIMUM
340.92179132	27.60601167	0.07516443	MINIMUM
353.84435312	47.15556020	0.07854501	SADDLE
180.44665979	238.11814215	1.26501296	SADDLE
1.68699039	239.23931200	1.93937962	SADDLE
180.87457206	58.38694792	3.26173101	MAXIMUM

Download:

MOID Plots

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