Asteroids

2023EP1 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.645

Aphelion (Q)

1.688

Eccentricity (e)

0.447

Inclination (i)

31.4

deg

Orbit period (P)

460.3

Earth MOID

0.00419

U parameter

5.8

Next Earth close approach

Date

2026-09-03

Nominal distance (from Earth center)

0.11444

17120717

Maximum Brightness

21.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.5

mag

Diameter

210 - 500*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-03-14

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.166624

1-sigma variation

0.000029

Unit

Eccentricity (e)

Value

0.447333

1-sigma variation

0.000014

Unit

Inclination (i)

Value

31.3718

1-sigma variation

0.0009

Unit

Long. of Ascending Node (Ω)

Value

349.9325

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

81.5699

1-sigma variation

0.0014

Unit

Mean Anomaly (M)

Value

252.33374

1-sigma variation

0.03768

Unit

Perihelion distance

Value

0.644755

1-sigma variation

Unit

Aphelion distance

Value

1.688494

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.131085

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.005602

1-sigma variation

Unit

MOID

Value

0.004189

1-sigma variation

Unit

Orbit Period

Value

460.2512

1-sigma variation

Unit

U parameter

Value

5.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.60430E-10	4.13033E-10	2.65778E-8	-2.72703E-9	4.07214E-8	-1.10520E-6
e	4.13033E-10	1.98837E-10	1.27973E-8	-1.30755E-9	1.94826E-8	-5.30541E-7
i	2.65778E-8	1.27973E-8	8.25062E-7	-8.40896E-8	1.25329E-6	-3.41392E-5
Ω	-2.72703E-9	-1.30755E-9	-8.40896E-8	8.70464E-9	-1.29232E-7	3.50274E-6
ω	4.07214E-8	1.94826E-8	1.25329E-6	-1.29232E-7	1.93465E-6	-5.23041E-5
M	-1.10520E-6	-5.30541E-7	-3.41392E-5	3.50274E-6	-5.23041E-5	1.41959E-3

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

20.521

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

210 - 500*

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

1040

Unit

Source

[1]

Normalized RMS of residuals

Value

0.582686

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-03-14.017803

Unit

Source

[2]

Last Observation

Value

2023-05-26.99458

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

201 (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

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 2023EP1 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	1950-03-10 01:33	> 1 d	0.0113618	0.0053991	0.0327508
EARTH	1953-08-29 09:49	> 1 d	0.1717276	0.1160075	0.0256151
EARTH	1955-03-18 05:16	> 1 d	0.1876771	0.0918525	0.0319424
EARTH	1958-09-10 03:58	> 1 d	0.1218952	0.1078542	0.0131911
EARTH	1984-03-04 07:28	46.2	0.1682942	0.1645573	0.0012457
EARTH	1989-03-11 10:56	395.4	0.0309512	0.0102969	0.0070496
EARTH	1992-09-01 15:36	526.2	0.1301298	0.1202410	0.0036550
EARTH	1997-09-15 18:56	532.3	0.1790461	0.1663365	0.0043531
EARTH	2018-03-04 12:55	44.7	0.1790897	0.1755837	0.0011687
EARTH	2023-03-12 15:58	< 1 s	0.0470756	0.0470710	0.0000015
EARTH	2026-09-03 23:01	74.3	0.1144449	0.1134064	0.0003547
EARTH	2052-03-07 09:49	324.6	0.0758357	0.0563082	0.0065111
EARTH	2057-03-16 12:45	366.0	0.1526674	0.1336734	0.0063313
EARTH	2060-09-09 06:43	554.4	0.1155181	0.1090875	0.0025962
EARTH	2086-03-10 04:10	257.5	0.0157292	0.0031888	0.0046871
EARTH	2089-08-28 16:18	588.9	0.1847535	0.1675257	0.0058914
EARTH	2091-03-17 12:39	680.0	0.1625743	0.1274431	0.0117104
EARTH	2094-09-08 00:14	> 1 d	0.1075227	0.1058823	0.0041160
EARTH	2125-03-07 05:04	> 1 d	0.1230248	0.0009899	0.1209660

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
70.99966843	67.51283504	0.00323217	MINIMUM
297.54323635	243.31160687	0.10536055	MINIMUM
3.86872067	336.78268196	0.54840314	SADDLE
184.21306790	151.48145049	0.97261821	SADDLE
1.04598238	151.61952210	1.60291335	SADDLE
176.77676888	326.09646715	2.58479241	MAXIMUM

Download:

MOID Plots

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