Asteroids

2023EW help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Amor

Perihelion (q)

1.021

Aphelion (Q)

1.814

Eccentricity (e)

0.280

Inclination (i)

3.3

deg

Orbit period (P)

616.3

Earth MOID

0.03188

U parameter

7.0

Next Earth close approach

Date

2050-03-14

Nominal distance (from Earth center)

0.03549

5308962

Maximum Brightness

20.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.2

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-03-13

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

1.417325

1-sigma variation

0.000305

Unit

Eccentricity (e)

Value

0.279907

1-sigma variation

0.000145

Unit

Inclination (i)

Value

3.2933

1-sigma variation

0.0015

Unit

Long. of Ascending Node (Ω)

Value

177.0768

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

342.3723

1-sigma variation

0.0012

Unit

Mean Anomaly (M)

Value

337.76947

1-sigma variation

0.22628

Unit

Perihelion distance

Value

1.020606

1-sigma variation

Unit

Aphelion distance

Value

1.814044

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.036271

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.776525

1-sigma variation

Unit

MOID

Value

0.031884

1-sigma variation

Unit

Orbit Period

Value

616.3149

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.29376E-8	4.41991E-8	4.44714E-7	-6.92179E-8	3.57003E-7	-6.89818E-5
e	4.41991E-8	2.10201E-8	2.11497E-7	-3.29189E-8	1.69776E-7	-3.28062E-5
i	4.44714E-7	2.11497E-7	2.12806E-6	-3.31261E-7	1.70809E-6	-3.30083E-4
Ω	-6.92179E-8	-3.29189E-8	-3.31261E-7	5.17253E-8	-2.65592E-7	5.13758E-5
ω	3.57003E-7	1.69776E-7	1.70809E-6	-2.65592E-7	1.38009E-6	-2.64986E-4
M	-6.89818E-5	-3.28062E-5	-3.30083E-4	5.13758E-5	-2.64986E-4	5.12009E-2

Date of computation: 2026-03-17 23:26 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

26.222

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

15 - 30*

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

1144

Unit

Source

[1]

Normalized RMS of residuals

Value

0.473751

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-03-13.150969

Unit

Source

[2]

Last Observation

Value

2023-04-15.266435

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

61 (2)

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

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 2023EW 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	1954-03-02 11:01	> 1 mo	0.0349282	0.0257241	0.0392044
EARTH	1986-02-02 20:03	> 1 d	0.1430359	0.0311253	0.0404293
EARTH	1991-03-31 21:32	> 1 d	0.1145488	0.0046668	0.0536180
EARTH	2023-03-15 06:30	< 1 min	0.0363442	0.0362910	0.0000178
EARTH	2050-03-14 15:50	> 1 w	0.0354882	0.0273132	0.0202131
EARTH	2072-02-25 18:57	> 1 mo	0.0446199	0.0107468	0.2922070
EARTH	2099-02-19 11:13	> 1 mo	0.0609633	0.0029522	0.7645238

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
6.42344672	65.84442430	0.03071409	MINIMUM
181.40910264	239.71044863	0.80453885	SADDLE
2.86530191	241.13450468	2.03003847	SADDLE
181.66884926	59.89773071	2.80564118	MAXIMUM

Download:

MOID Plots

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