Asteroids

2018MR8 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.799

Aphelion (Q)

1.146

Eccentricity (e)

0.178

Inclination (i)

28.0

deg

Orbit period (P)

350.2

Earth MOID

0.10526

U parameter

1.4

Next Earth close approach

Date

2040-01-19

Nominal distance (from Earth center)

0.1868

27945462

Maximum Brightness

24.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.4

mag

Diameter

220 - 500*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-06-24

Observatory

Pan-STARRS 1, Haleakala

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.972285

1-sigma variation

2.468E-8

Unit

Eccentricity (e)

Value

0.178261

1-sigma variation

1.984E-7

Unit

Inclination (i)

Value

27.9513

1-sigma variation

3.199E-5

Unit

Long. of Ascending Node (Ω)

Value

288.0307

1-sigma variation

6.906E-6

Unit

Arg. of Perihelion (ω)

Value

155.4990

1-sigma variation

3.321E-5

Unit

Mean Anomaly (M)

Value

259.26707

1-sigma variation

0.00011

Unit

Perihelion distance

Value

0.798964

1-sigma variation

Unit

Aphelion distance

Value

1.145606

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.107420

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.173712

1-sigma variation

Unit

MOID

Value

0.105264

1-sigma variation

Unit

Orbit Period

Value

350.1780

1-sigma variation

Unit

U parameter

Value

1.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.09170E-16	-2.09792E-15	-3.40106E-13	-5.76948E-14	-7.22519E-14	-2.44917E-12
e	-2.09792E-15	3.93747E-14	4.35831E-12	8.27428E-13	-3.46809E-12	1.55995E-11
i	-3.40106E-13	4.35831E-12	1.02342E-9	1.66302E-10	2.59084E-11	1.57143E-9
Ω	-5.76948E-14	8.27428E-13	1.66302E-10	4.76916E-11	-4.97935E-11	3.20828E-10
ω	-7.22519E-14	-3.46809E-12	2.59084E-11	-4.97935E-11	1.10273E-9	-1.37205E-9
M	-2.44917E-12	1.55995E-11	1.57143E-9	3.20828E-10	-1.37205E-9	1.25296E-8

Date of computation: 2025-07-29 02:36 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

20.362

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

220 - 500*

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

1018

Unit

Source

[1]

Unobserved

Value

1890

Unit

Source

[1]

Normalized RMS of residuals

Value

0.545161

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-08-31.246621

Unit

Source

[2]

Last Observation

Value

2020-06-14.43385

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

241 (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 2018MR8 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	1971-07-12 02:27	< 1 min	0.1114148	0.1114060	0.0000029
EARTH	1994-01-05 16:45	< 1 min	0.1797305	0.1797266	0.0000013
EARTH	1994-07-10 06:09	< 1 min	0.1403427	0.1403342	0.0000028
EARTH	1995-07-15 04:18	< 1 min	0.1554415	0.1554322	0.0000031
EARTH	2017-01-12 14:36	< 1 min	0.1724053	0.1724049	0.0000002
EARTH	2017-07-07 23:00	< 1 min	0.1870412	0.1870408	0.0000001
EARTH	2018-07-13 23:43	< 1 s	0.1162160	0.1162157	0.0000001
EARTH	2040-01-19 09:30	< 1 min	0.1868039	0.1867989	0.0000017
EARTH	2041-07-12 15:13	< 1 min	0.1052199	0.1052194	0.0000002
EARTH	2064-01-02 08:50	1.8	0.1943419	0.1943286	0.0000044
EARTH	2064-07-11 01:22	< 1 min	0.1197554	0.1197430	0.0000041
EARTH	2065-07-15 07:06	< 1 min	0.1849904	0.1849672	0.0000077
EARTH	2087-01-09 10:21	2.5	0.1734468	0.1734411	0.0000019
EARTH	2087-07-09 21:14	< 1 min	0.1593786	0.1593514	0.0000091
EARTH	2088-07-14 08:04	< 1 min	0.1363570	0.1363324	0.0000082
EARTH	2110-01-16 15:57	3.3	0.1764634	0.1764514	0.0000040
EARTH	2111-07-15 01:19	< 1 min	0.1089241	0.1089107	0.0000045

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
212.09350978	188.13462284	0.10526370	MINIMUM
23.20656702	8.39099238	0.17234377	MINIMUM
302.64032694	275.91221773	0.46789186	SADDLE
111.37815984	101.73541306	0.49038776	SADDLE
334.00731795	134.68063355	1.79246680	SADDLE
188.61691262	350.27561555	2.12234440	MAXIMUM

Download:

MOID Plots

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