Asteroids

2023ET help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.853

Aphelion (Q)

2.742

Eccentricity (e)

0.526

Inclination (i)

2.8

deg

Orbit period (P)

880.1

Earth MOID

0.00106

U parameter

7.4

Next Earth close approach

Date

2051-11-22

Nominal distance (from Earth center)

0.05582

8350446

Maximum Brightness

22.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.1

mag

Diameter

16 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-03-12

Observatory

ATLAS South Africa, Sutherland

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

1.797275

1-sigma variation

0.000834

Unit

Eccentricity (e)

Value

0.525519

1-sigma variation

0.000246

Unit

Inclination (i)

Value

2.8348

1-sigma variation

0.0011

Unit

Long. of Ascending Node (Ω)

Value

168.8604

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

307.1755

1-sigma variation

0.0006

Unit

Mean Anomaly (M)

Value

59.06525

1-sigma variation

0.29368

Unit

Perihelion distance

Value

0.852774

1-sigma variation

Unit

Aphelion distance

Value

2.741777

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.006624

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.899108

1-sigma variation

Unit

MOID

Value

0.001062

1-sigma variation

Unit

Orbit Period

Value

880.0764

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.95259E-7	2.05457E-7	9.07711E-7	-4.57450E-8	-4.23323E-7	-2.44878E-4
e	2.05457E-7	6.07158E-8	2.68263E-7	-1.34374E-8	-1.25369E-7	-7.23645E-5
i	9.07711E-7	2.68263E-7	1.18617E-6	-5.65120E-8	-5.61961E-7	-3.19706E-4
Ω	-4.57450E-8	-1.34374E-8	-5.65120E-8	1.36585E-8	-3.98539E-9	1.61151E-5
ω	-4.23323E-7	-1.25369E-7	-5.61961E-7	-3.98539E-9	3.61857E-7	1.49088E-4
M	-2.44878E-4	-7.23645E-5	-3.19706E-4	1.61151E-5	1.49088E-4	8.62491E-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

26.103

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

[-]

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

942

Unit

Source

[1]

Normalized RMS of residuals

Value

0.442217

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-03-12.937098

Unit

Source

[2]

Last Observation

Value

2023-03-20.31575

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

70 (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 2023ET 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	1950-02-01 06:08	> 1 w	0.1262227	0.0937387	0.0109569
EARTH	1975-11-18 17:48	> 1 w	0.0698863	0.0473728	0.0778971
EARTH	1983-02-11 19:14	> 1 mo	0.1105143	0.0163321	0.0575979
EARTH	2015-12-10 22:48	> 1 w	0.0962619	0.0532115	0.0181294
EARTH	2023-03-11 07:50	< 1 min	0.0034487	0.0034444	0.0000014
EARTH	2051-11-22 18:48	> 1 w	0.0558193	0.0471650	0.0538578
EARTH	2064-01-01 17:27	> 1 mo	0.1294831	0.0742906	0.0441677
EARTH	2076-02-20 12:45	> 1 mo	0.0944813	0.0109602	0.1469691
EARTH	2088-03-15 11:28	> 1 w	0.0359785	0.0028799	0.2065742
EARTH	2116-12-03 05:57	> 1 mo	0.0638714	0.0481402	1.0893417
4 Vesta	2119-12-27 09:44	> 1 d	0.0167876	0.0165598	0.2176242

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
31.67408097	66.85491753	0.00097664	MINIMUM
328.94828164	321.40953263	0.04696222	MINIMUM
359.57718569	12.83324764	0.13625557	SADDLE
180.07103528	193.95492444	1.72708509	SADDLE
0.38469918	194.24698408	1.86817849	SADDLE
180.16042675	14.00244719	3.72521489	MAXIMUM

Download:

MOID Plots

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