Asteroids

2018GE help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.823

Aphelion (Q)

1.020

Eccentricity (e)

0.107

Inclination (i)

1.2

deg

Orbit period (P)

323.1

Earth MOID

0.00995

U parameter

6.3

Next Earth close approach

Date

2026-06-07

Nominal distance (from Earth center)

0.04106

6142580

Maximum Brightness

24.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.5

mag

Diameter

9 - 19*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-04-05

Observatory

Mt. Lemmon Survey

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

0.921502

1-sigma variation

0.000034

Unit

Eccentricity (e)

Value

0.106910

1-sigma variation

0.000034

Unit

Inclination (i)

Value

1.2387

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

163.5984

1-sigma variation

0.0582

Unit

Arg. of Perihelion (ω)

Value

243.6353

1-sigma variation

0.0603

Unit

Mean Anomaly (M)

Value

219.46545

1-sigma variation

0.06294

Unit

Perihelion distance

Value

0.822984

1-sigma variation

Unit

Aphelion distance

Value

1.020019

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.034974

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.138892

1-sigma variation

Unit

MOID

Value

0.009954

1-sigma variation

Unit

Orbit Period

Value

323.1043

1-sigma variation

Unit

U parameter

Value

6.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.12310E-9	-1.15300E-9	1.38555E-8	1.95197E-6	-2.02161E-6	2.10922E-6
e	-1.15300E-9	1.18370E-9	-1.42243E-8	-2.00394E-6	2.07543E-6	-2.16539E-6
i	1.38555E-8	-1.42243E-8	1.70982E-7	2.40829E-5	-2.49418E-5	2.60211E-5
Ω	1.95197E-6	-2.00394E-6	2.40829E-5	3.39264E-3	-3.51366E-3	3.66588E-3
ω	-2.02161E-6	2.07543E-6	-2.49418E-5	-3.51366E-3	3.63900E-3	-3.79666E-3
M	2.10922E-6	-2.16539E-6	2.60211E-5	3.66588E-3	-3.79666E-3	3.96122E-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

27.473

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

9 - 19*

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

2931

Unit

Source

[1]

Normalized RMS of residuals

Value

0.875495

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-04-05.42481

Unit

Source

[2]

Last Observation

Value

2018-05-08.25986

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

58 (8)

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 2018GE 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	1958-01-24 20:58	> 1 mo	0.0983744	0.0141643	0.0671000
EARTH	1958-06-12 02:04	> 1 w	0.0416752	0.0302183	0.0803895
EARTH	1967-01-23 01:55	> 1 mo	0.1036859	0.0118709	0.0332385
EARTH	1967-06-13 04:35	> 1 d	0.0489837	0.0309135	0.0475888
EARTH	1975-11-09 14:32	> 1 w	0.1531213	0.1515406	0.0006101
EARTH	1984-03-26 09:34	30.2	0.0722849	0.0042295	0.0382040
EARTH	1984-08-31 15:00	> 1 mo	0.1166454	0.0850844	0.0140276
EARTH	1993-04-17 05:26	> 1 d	0.0191577	0.0131377	0.0020112
EARTH	2001-10-21 20:22	> 1 d	0.1551172	0.1547085	0.0001374
EARTH	2010-01-21 22:48	> 1 d	0.1065854	0.1050324	0.0005178
EARTH	2010-06-10 08:33	96.2	0.0500724	0.0476893	0.0008041
EARTH	2018-04-03 13:38	< 1 min	0.0104341	0.0104292	0.0000016
EARTH	2026-01-25 15:18	> 1 d	0.1057640	0.1041045	0.0005536
EARTH	2026-06-07 11:44	113.3	0.0410606	0.0388119	0.0007580
EARTH	2033-10-23 21:39	> 1 d	0.1696056	0.1695258	0.0000271
EARTH	2041-04-16 04:47	> 1 d	0.0177514	0.0112659	0.0022455
EARTH	2048-10-09 23:55	> 1 w	0.1698258	0.1677531	0.0007163
EARTH	2055-12-28 20:23	> 1 mo	0.1386105	0.1061914	0.0108431
EARTH	2056-06-05 11:41	394.4	0.1055942	0.0255749	0.0292530
EARTH	2063-03-22 06:01	320.3	0.0694859	0.0110371	0.0209996
EARTH	2063-08-15 13:21	> 1 mo	0.1239880	0.0970606	0.0092122
EARTH	2070-11-19 11:39	> 1 mo	0.1674789	0.1523724	0.0050366
EARTH	2078-03-24 21:00	> 1 w	0.0205266	0.0114050	0.0714566
EARTH	2078-07-27 17:36	> 1 mo	0.0963205	0.0019231	0.0530075
EARTH	2086-03-22 14:09	> 1 w	0.1169940	0.0096850	1.2600676
EARTH	2086-09-10 23:27	> 1 mo	0.1387872	0.0690054	0.3478971
EARTH	2094-10-25 22:40	> 1 mo	0.1611714	0.1473596	0.0389385
EARTH	2102-12-09 08:19	> 1 mo	0.1479376	0.0257194	0.3399424
EARTH	2103-06-11 15:05	> 1 w	0.1543961	0.0156088	1.6445133
EARTH	2111-01-25 17:24	> 1 mo	0.1036465	0.0378464	0.5739712
EARTH	2111-06-10 20:15	> 1 mo	0.0337551	0.0168492	0.8380573
EARTH	2118-12-03 21:05	> 1 mo	0.1581207	0.0165170	1.2200117
EARTH	2119-06-10 05:26	> 1 mo	0.1914386	0.0174105	6.8092021
EARTH	2126-10-17 19:46	> 1 mo	0.1658246	0.1131209	0.8638353

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
139.18383968	88.04922884	0.01000654	MINIMUM
195.64223442	139.53812795	0.02152771	MINIMUM
184.46591508	129.34063105	0.02172463	SADDLE
350.60335072	296.70718355	0.16587651	SADDLE
349.69398619	115.72372071	1.83624496	SADDLE
171.81186757	297.85202985	2.01166167	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2018GE

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2112-05-29.905	92600.905	-2.517	0.000	3.21 ± 0.000	1.49E8	1.07E-9	2.46E-2	-10.67	0


Based on 58 optical observations (of which 8 are rejected as outliers) from 2018/04/05.425 to 2018/05/08.260.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 5.72 and 5.72 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: