Asteroids

2018WE3 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.926

Aphelion (Q)

4.531

Eccentricity (e)

0.661

Inclination (i)

8.7

deg

Orbit period (P)

1646.2

Earth MOID

0.02443

U parameter

4.4

Next Earth close approach

Date

2027-09-22

Nominal distance (from Earth center)

0.15079

22558331

Maximum Brightness

19.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

21.1

mag

Diameter

560

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-11-27

Observatory

WISE

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.728461

1-sigma variation

0.000025

Unit

Eccentricity (e)

Value

0.660612

1-sigma variation

0.000003

Unit

Inclination (i)

Value

8.7098

1-sigma variation

2.660E-5

Unit

Long. of Ascending Node (Ω)

Value

240.6602

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

159.4814

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

207.37015

1-sigma variation

0.00772

Unit

Perihelion distance

Value

0.926007

1-sigma variation

Unit

Aphelion distance

Value

4.530915

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

3.018207

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.037563

1-sigma variation

Unit

MOID

Value

0.024429

1-sigma variation

Unit

Orbit Period

Value

1646.1715

1-sigma variation

Unit

U parameter

Value

4.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.10361E-10	7.98644E-11	5.97346E-10	1.93059E-9	-1.21803E-9	-1.90783E-7
e	7.98644E-11	1.04517E-11	7.81628E-11	2.52445E-10	-1.59764E-10	-2.49634E-8
i	5.97346E-10	7.81628E-11	7.07362E-10	2.61809E-9	-1.94396E-9	-1.86694E-7
Ω	1.93059E-9	2.52445E-10	2.61809E-9	1.24986E-8	-1.02897E-8	-6.03351E-7
ω	-1.21803E-9	-1.59764E-10	-1.94396E-9	-1.02897E-8	9.25208E-9	3.80521E-7
M	-1.90783E-7	-2.49634E-8	-1.86694E-7	-6.03351E-7	3.80521E-7	5.96339E-5

Date of computation: 2025-09-10 00:30 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

21.059

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.017

Unit

Source

[2]

Diameter

Value

560

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]	EARN	1.) Joseph R. Masiero et al 2020 Planet. Sci. J. 1 5

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

215

Unit

Source

[1]

Unobserved

Value

2450

Unit

Source

[1]

Normalized RMS of residuals

Value

0.605346

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-07-08.55702

Unit

Source

[2]

Last Observation

Value

2019-02-08.17717

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

58 (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

Close Approaches for 2018WE3 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1959-11-02 16:31	> 1 w	0.0889775	0.0663800	0.0149654
EARTH	1968-11-30 09:38	784.6	0.0187118	0.0184230	0.0005237
EARTH	2018-09-15 12:53	< 1 min	0.1854244	0.1854225	0.0000006
EARTH	2027-09-22 09:03	123.8	0.1507931	0.1496161	0.0003955
EARTH	2086-10-05 23:39	929.1	0.1283985	0.1216813	0.0023337
EARTH	2095-12-13 20:29	746.4	0.1048257	0.0912156	0.0046150
EARTH	2104-12-13 08:20	483.8	0.1102871	0.1008809	0.0031575

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
12.98866541	326.61700266	0.02481266	MINIMUM
358.68551200	116.15549144	1.93199959	SADDLE
179.65193967	117.78364908	3.52524339	SADDLE
179.88459057	297.89086192	5.52197793	MAXIMUM

Download:

MOID Plots

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