Asteroids

2018GB5 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.962

Aphelion (Q)

1.659

Eccentricity (e)

0.266

Inclination (i)

36.5

deg

Orbit period (P)

547.9

Earth MOID

0.07378

U parameter

9.0

Next Earth close approach

Date

2027-04-14

Nominal distance (from Earth center)

0.07554

11301029

Maximum Brightness

20.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

26 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-04-14

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.310370

1-sigma variation

0.004140

Unit

Eccentricity (e)

Value

0.265926

1-sigma variation

0.001771

Unit

Inclination (i)

Value

36.4909

1-sigma variation

0.0861

Unit

Long. of Ascending Node (Ω)

Value

26.0878

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

117.9162

1-sigma variation

0.3254

Unit

Mean Anomaly (M)

Value

61.43009

1-sigma variation

7.55362

Unit

Perihelion distance

Value

0.961908

1-sigma variation

Unit

Aphelion distance

Value

1.658831

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.394729

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.077887

1-sigma variation

Unit

MOID

Value

0.073779

1-sigma variation

Unit

Orbit Period

Value

547.8847

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.71386E-5	7.33031E-6	3.56476E-4	5.73101E-7	1.34730E-3	-3.12711E-2
e	7.33031E-6	3.13525E-6	1.52467E-4	2.45098E-7	5.76244E-4	-1.33749E-2
i	3.56476E-4	1.52467E-4	7.41462E-3	1.19209E-5	2.80235E-2	-6.50425E-1
Ω	5.73101E-7	2.45098E-7	1.19209E-5	1.91994E-8	4.50580E-5	-1.04568E-3
ω	1.34730E-3	5.76244E-4	2.80235E-2	4.50580E-5	1.05916E-1	-2.45828E0
M	-3.12711E-2	-1.33749E-2	-6.50425E-1	-1.04568E-3	-2.45828E0	5.70571E1

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

25.014

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

26 - 60*

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]	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

2757

Unit

Source

[1]

Normalized RMS of residuals

Value

0.700414

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-04-14.3391

Unit

Source

[2]

Last Observation

Value

2018-04-19.24692

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

45 (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

[-]

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 2018GB5 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	1985-04-10 07:06	> 1 mo	0.1756089	0.0746798	1.4898007
EARTH	1988-04-10 18:24	> 1 mo	0.1486962	0.0748746	1.2605387
EARTH	1991-04-12 03:18	> 1 mo	0.1274554	0.0748644	1.0166109
EARTH	1994-04-12 11:16	> 1 w	0.1097919	0.0749879	0.7609351
EARTH	1997-04-12 16:28	> 1 w	0.0972768	0.0750414	0.5289515
EARTH	2000-04-12 20:37	> 1 w	0.0882690	0.0753040	0.3308907
EARTH	2003-04-13 22:03	> 1 w	0.0828355	0.0752007	0.1942931
MARS	2005-10-02 18:52	> 1 w	0.0273815	0.0219464	0.1675938
EARTH	2006-04-13 22:38	> 1 w	0.0793459	0.0752530	0.1033026
EARTH	2009-04-13 20:23	> 1 d	0.0777126	0.0751586	0.0557879
EARTH	2012-04-13 17:53	> 1 d	0.0767521	0.0752947	0.0261513
EARTH	2015-04-14 13:30	> 1 d	0.0761655	0.0750641	0.0108570
EARTH	2018-04-14 09:04	< 1 min	0.0758838	0.0752686	0.0002051
EARTH	2021-04-14 03:35	> 1 d	0.0756387	0.0750433	0.0080089
EARTH	2024-04-13 22:32	> 1 d	0.0756713	0.0752151	0.0147938
EARTH	2027-04-14 16:23	> 1 d	0.0755427	0.0750341	0.0256067
EARTH	2030-04-14 10:32	> 1 w	0.0756709	0.0751339	0.0394408
EARTH	2033-04-14 03:49	> 1 w	0.0757109	0.0750081	0.0651599
EARTH	2036-04-13 21:37	> 1 w	0.0759839	0.0751739	0.0992381
EARTH	2039-04-14 14:04	> 1 w	0.0762014	0.0749477	0.1730459
EARTH	2042-04-14 06:27	> 1 mo	0.0768516	0.0750140	0.2904028
EARTH	2045-04-13 21:21	> 1 mo	0.0778303	0.0748326	0.5086581
EARTH	2048-04-13 11:56	> 1 mo	0.0796691	0.0750193	0.8551500
EARTH	2051-04-14 00:14	> 1 mo	0.0828173	0.0747923	1.4773495
EARTH	2054-04-13 11:21	> 1 mo	0.0882148	0.0748785	2.4101213
EARTH	2057-04-12 19:52	> 1 mo	0.0968115	0.0746604	3.7360888
EARTH	2060-04-12 03:02	> 1 mo	0.1092311	0.0748028	5.3248336
EARTH	2063-04-12 07:12	> 1 mo	0.1268169	0.0744513	7.0911314
EARTH	2066-04-11 10:10	> 1 mo	0.1490246	0.0744232	8.7875876
EARTH	2069-04-10 11:11	> 1 mo	0.1759495	0.0741205	10.3667067

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
47.36127573	101.22569934	0.07500634	MINIMUM
271.82308489	296.05337124	0.34894722	MINIMUM
336.33708555	10.11165020	0.61764320	SADDLE
158.24355888	208.10583127	1.00314394	SADDLE
349.81961764	211.15186131	1.88883250	SADDLE
198.03406616	62.34880457	2.56877591	MAXIMUM

Download:

MOID Plots

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