Asteroids

2023ER

Last update: 2023-03-30 23:53 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.696

Aphelion (Q)

1.378

Eccentricity (e)

0.329

Inclination (i)

17.4

deg

Orbit period (P)

385.8

Earth MOID

0.00240

U parameter

7.0

Next Earth close approach

Date

2039-08-22

Nominal distance (from Earth center)

0.1337

20000535

Maximum Brightness

124.3

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

24.1

mag

Diameter

50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-03-11

Observatory

ATLAS South Africa, Sutherland

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

1.037127

1-sigma variation

0.000135

Unit

Eccentricity (e)

Value

0.328636

1-sigma variation

0.000177

Unit

Inclination (i)

Value

17.4312

1-sigma variation

0.0104

Unit

Ascending Node (Ω)

Value

348.6366

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

78.6288

1-sigma variation

0.0065

Unit

Mean Anomaly (M)

Value

51.70998

1-sigma variation

0.02479

Unit

Perihelion

Value

0.696289

1-sigma variation

Unit

Aphelion

Value

1.377964

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.138873

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.003571

1-sigma variation

Unit

MOID

Value

0.002401

1-sigma variation

Unit

Orbit Period

Value

385.7858

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.82537E-8	2.39158E-8	1.40805E-6	2.94951E-8	8.82932E-7	-3.34875E-6
e	2.39158E-8	3.13393E-8	1.84508E-6	3.85941E-8	1.15641E-6	-4.38763E-6
i	1.40805E-6	1.84508E-6	1.08630E-4	2.27322E-6	6.80865E-5	-2.58323E-4
Ω	2.94951E-8	3.85941E-8	2.27322E-6	4.92547E-8	1.43038E-6	-5.41056E-6
ω	8.82932E-7	1.15641E-6	6.80865E-5	1.43038E-6	4.27401E-5	-1.61968E-4
M	-3.34875E-6	-4.38763E-6	-2.58323E-4	-5.41056E-6	-1.61968E-4	6.14351E-4

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

24.133

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

50*

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

1.0

Unit

Source

[1]

Astrometry Summary

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

Optical

Value

Unit

Source

RMS of Residuals

Value

0.641221

Unit

arcsec

Source

[1]

First Observation

Value

2023-03-11.937067

Unit

Source

[2]

Last Observation

Value

2023-03-30.03447

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

31 (0)

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 2023ER 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	1963-09-11 06:48	> 1 w	0.1652494	0.1095824	0.0461752
EARTH	1967-03-10 12:20	996.5	0.0147003	0.0015201	0.0190045
EARTH	1981-08-17 12:18	> 1 d	0.1866492	0.1359084	0.0188383
EARTH	1982-09-17 17:22	> 1 d	0.1987937	0.1534575	0.0175210
EARTH	1986-03-14 09:44	1434.2	0.1201188	0.0430995	0.0256877
EARTH	2000-08-26 02:15	> 1 d	0.1040452	0.1001413	0.0060645
EARTH	2004-03-06 11:41	796.0	0.0897495	0.0221625	0.0225503
EARTH	2019-09-03 14:47	484.9	0.1172539	0.1123929	0.0017487
EARTH	2023-03-09 21:37	< 1 min	0.0070032	0.0069907	0.0000042
EARTH	2039-08-22 03:31	> 1 d	0.1336953	0.1088689	0.0120010
EARTH	2044-03-10 14:00	1340.6	0.0312265	0.0029794	0.0247783
EARTH	2060-09-03 07:26	> 1 w	0.1242733	0.1069424	0.0359051
EARTH	2064-03-06 13:21	> 1 d	0.0944200	0.0034297	0.0894179
EARTH	2080-08-23 03:55	> 1 w	0.1201032	0.1041279	0.0662454
EARTH	2085-03-12 16:30	> 1 d	0.0753914	0.0041716	0.1436273
EARTH	2101-09-10 20:51	> 1 d	0.1597015	0.1192844	0.0168895
EARTH	2105-03-09 19:02	16.2	0.0310812	0.0287859	0.0007651
EARTH	2121-08-22 09:12	> 1 w	0.1374548	0.1053467	0.0718182

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