Asteroids

2023EP1

Last update: 2023-03-30 21:00 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.645

Aphelion (Q)

1.689

Eccentricity (e)

0.448

Inclination (i)

31.4

deg

Orbit period (P)

460.4

Earth MOID

0.00432

U parameter

7.9

Next Earth close approach

Date

2026-09-05

Nominal distance (from Earth center)

0.10753

16085800

Maximum Brightness

122.2

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

20.5

mag

Diameter

280*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-03-14

Observatory

ATLAS Chile, Rio Hurtado

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.166850

1-sigma variation

0.000768

Unit

Eccentricity (e)

Value

0.447619

1-sigma variation

0.000381

Unit

Inclination (i)

Value

31.4008

1-sigma variation

0.0254

Unit

Ascending Node (Ω)

Value

349.9499

1-sigma variation

0.0024

Unit

Arg. of Perihelion (ω)

Value

81.5315

1-sigma variation

0.0347

Unit

Mean Anomaly (M)

Value

33.67622

1-sigma variation

0.05809

Unit

Perihelion

Value

0.644546

1-sigma variation

Unit

Aphelion

Value

1.689155

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.131987

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.005779

1-sigma variation

Unit

MOID

Value

0.004323

1-sigma variation

Unit

Orbit Period

Value

460.3850

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.90177E-7	2.92627E-7	1.95205E-5	-1.82417E-6	2.66361E-5	-4.46233E-5
e	2.92627E-7	1.45097E-7	9.67917E-6	-9.04471E-7	1.32065E-5	-2.21256E-5
i	1.95205E-5	9.67917E-6	6.45687E-4	-6.03353E-5	8.80973E-4	-1.47595E-3
Ω	-1.82417E-6	-9.04471E-7	-6.03353E-5	5.63833E-6	-8.23294E-5	1.37925E-4
ω	2.66361E-5	1.32065E-5	8.80973E-4	-8.23294E-5	1.20220E-3	-2.01395E-3
M	-4.46233E-5	-2.21256E-5	-1.47595E-3	1.37925E-4	-2.01395E-3	3.37397E-3

Date of computation: 2023-03-30 12:41 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

20.541

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

280*

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 ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.60793

Unit

arcsec

Source

[1]

First Observation

Value

2023-03-14.017803

Unit

Source

[2]

Last Observation

Value

2023-03-24.08125

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

170 (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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2023EP1 from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1960-03-07 14:08	> 1 w	0.0652993	0.0047229	0.2190762
EARTH	1963-08-28 22:22	> 1 w	0.1865289	0.1120152	0.1756618
EARTH	1965-03-17 11:05	> 1 w	0.1804260	0.0013193	0.2196009
EARTH	1968-09-11 12:46	> 1 w	0.1363683	0.1086934	0.1336936
EARTH	1989-03-05 06:34	> 1 d	0.1447411	0.0027342	0.1927053
EARTH	1994-03-14 12:50	> 1 d	0.1018904	0.0035888	0.1720083
EARTH	1997-09-07 06:41	> 1 w	0.1061628	0.1052410	0.0192989
EARTH	2023-03-12 15:58	< 1 s	0.0471119	0.0469938	0.0000394
EARTH	2026-09-05 04:32	> 1 d	0.1075269	0.1042554	0.0056381
EARTH	2047-03-04 12:46	> 1 d	0.1894385	0.0012780	0.1451635
EARTH	2052-03-13 08:02	> 1 d	0.0808924	0.0029876	0.1684508
EARTH	2055-09-07 12:20	> 1 w	0.1042161	0.1038949	0.0130498
EARTH	2076-03-05 19:23	> 1 d	0.1245486	0.0020073	0.1898834
EARTH	2081-03-16 06:21	> 1 w	0.1449792	0.0005540	0.1769542
EARTH	2084-09-10 18:46	> 1 w	0.1260926	0.1049617	0.0934549
EARTH	2105-03-09 07:41	> 1 d	0.0599798	0.0024478	0.0875990
EARTH	2108-08-30 11:25	> 1 d	0.1710164	0.1118275	0.0445612
EARTH	2113-09-15 05:31	1317.6	0.1588480	0.1254942	0.0120887

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