Asteroids

2023EM

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

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Aten

Perihelion (q)

0.833

Aphelion (Q)

1.036

Eccentricity (e)

0.109

Inclination (i)

14.2

deg

Orbit period (P)

330.1

Earth MOID

0.02080

U parameter

4.8

Next Earth close approach

Date

2023-08-17

Nominal distance (from Earth center)

0.16934

25332864

Maximum Brightness

128.7

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

25.5

mag

Diameter

29*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-03-09

Observatory

GINOP-KHK, Piszkesteto

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

0.934798

1-sigma variation

0.000004

Unit

Eccentricity (e)

Value

0.108767

1-sigma variation

0.000044

Unit

Inclination (i)

Value

14.1713

1-sigma variation

0.0119

Unit

Ascending Node (Ω)

Value

166.6680

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

215.3598

1-sigma variation

0.0076

Unit

Mean Anomaly (M)

Value

124.78818

1-sigma variation

0.01235

Unit

Perihelion

Value

0.833123

1-sigma variation

Unit

Aphelion

Value

1.036474

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.021356

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.159721

1-sigma variation

Unit

MOID

Value

0.020801

1-sigma variation

Unit

Orbit Period

Value

330.1226

1-sigma variation

Unit

U parameter

Value

4.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.56444E-11	-1.66485E-10	-4.44093E-8	8.43414E-10	-2.84728E-8	4.65799E-8
e	-1.66485E-10	1.92254E-9	5.19272E-7	-1.01517E-8	3.31708E-7	-5.40792E-7
i	-4.44093E-8	5.19272E-7	1.40550E-4	-2.76255E-6	8.96279E-5	-1.46082E-4
Ω	8.43414E-10	-1.01517E-8	-2.76255E-6	5.52763E-8	-1.74976E-6	2.85153E-6
ω	-2.84728E-8	3.31708E-7	8.96279E-5	-1.74976E-6	5.74378E-5	-9.35484E-5
M	4.65799E-8	-5.40792E-7	-1.46082E-4	2.85153E-6	-9.35484E-5	1.52407E-4

Date of computation: 2023-03-17 13:06 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

25.478

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

29*

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 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

0.338357

Unit

arcsec

Source

[1]

First Observation

Value

2023-03-09.882744

Unit

Source

[2]

Last Observation

Value

2023-03-16.85774

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

74 (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 2023EM 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	1957-03-03 13:12	64.8	0.1119780	0.0966304	0.0051447
EARTH	1957-09-04 14:50	> 1 d	0.1566563	0.1563636	0.0003037
EARTH	1976-03-06 01:01	21.7	0.0208530	0.0207854	0.0000313
EARTH	1976-08-16 07:18	208.7	0.1695881	0.1693052	0.0000963
EARTH	1985-09-26 07:21	296.0	0.1812113	0.1803988	0.0002748
EARTH	1995-03-11 14:29	81.9	0.0885087	0.0863917	0.0007071
EARTH	2004-03-03 05:29	2.3	0.1197801	0.1177444	0.0006789
EARTH	2004-09-05 05:05	320.8	0.1566957	0.1564744	0.0000794
EARTH	2023-03-06 16:32	< 1 min	0.0208948	0.0208454	0.0000165
EARTH	2023-08-17 02:07	71.0	0.1693397	0.1692824	0.0000192
EARTH	2032-09-27 04:20	145.3	0.1829882	0.1828463	0.0000478
EARTH	2042-03-09 23:60	53.0	0.0705700	0.0685149	0.0006864
EARTH	2042-08-03 17:55	144.7	0.1950935	0.1941595	0.0003137
EARTH	2051-03-03 19:00	13.2	0.1361470	0.1341609	0.0006624
EARTH	2051-09-08 07:52	213.8	0.1576841	0.1575914	0.0000332
EARTH	2061-03-20 21:56	16.8	0.1969629	0.1957742	0.0003963
EARTH	2070-03-06 04:33	8.5	0.0217609	0.0216722	0.0000306
EARTH	2070-08-17 18:13	35.2	0.1671395	0.1669643	0.0000584
EARTH	2079-10-03 15:56	271.6	0.1932781	0.1928295	0.0001515
EARTH	2089-03-06 14:38	67.8	0.0223558	0.0211636	0.0004685
EARTH	2089-08-13 12:11	371.7	0.1747313	0.1733455	0.0004702
EARTH	2098-09-19 12:43	> 1 d	0.1694398	0.1660332	0.0014454
EARTH	2108-03-15 04:27	1004.1	0.1339213	0.1035038	0.0103219
EARTH	2117-03-05 04:18	395.2	0.0679379	0.0334182	0.0125370
EARTH	2117-08-27 16:48	> 1 d	0.1570007	0.1560990	0.0013254

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