Asteroids

2017MJ8 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.560

Aphelion (Q)

2.257

Eccentricity (e)

0.602

Inclination (i)

9.9

deg

Orbit period (P)

610.5

Earth MOID

0.13099

U parameter

1.2

Next Earth close approach

Date

2032-05-31

Nominal distance (from Earth center)

0.18214

27247744

Maximum Brightness

20.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.7

mag

Diameter

190 - 400*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-06-20

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.408468

1-sigma variation

3.095E-8

Unit

Eccentricity (e)

Value

0.602289

1-sigma variation

9.751E-8

Unit

Inclination (i)

Value

9.8643

1-sigma variation

2.302E-5

Unit

Long. of Ascending Node (Ω)

Value

8.1381

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

149.6252

1-sigma variation

4.495E-5

Unit

Mean Anomaly (M)

Value

182.03240

1-sigma variation

0.00010

Unit

Perihelion distance

Value

0.560163

1-sigma variation

Unit

Aphelion distance

Value

2.256773

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.866980

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.407471

1-sigma variation

Unit

MOID

Value

0.130986

1-sigma variation

Unit

Orbit Period

Value

610.5468

1-sigma variation

Unit

U parameter

Value

1.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.58116E-16	1.62168E-15	-7.83803E-14	1.22728E-13	-7.94901E-14	-2.19274E-12
e	1.62168E-15	9.50839E-15	-1.29673E-12	1.77787E-12	-4.88375E-14	-7.57187E-12
i	-7.83803E-14	-1.29673E-12	5.29816E-10	-7.25551E-10	-1.10714E-11	1.71192E-9
Ω	1.22728E-13	1.77787E-12	-7.25551E-10	2.93976E-9	-1.92403E-9	-2.32939E-9
ω	-7.94901E-14	-4.88375E-14	-1.10714E-11	-1.92403E-9	2.02053E-9	-3.70104E-11
M	-2.19274E-12	-7.57187E-12	1.71192E-9	-2.32939E-9	-3.70104E-11	9.76825E-9

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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.686

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

190 - 400*

Unit

Source

[4]

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]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

3664

Unit

Source

[1]

Unobserved

Value

1646

Unit

Source

[1]

Normalized RMS of residuals

Value

0.688972

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2011-09-26.42597

Unit

Source

[2]

Last Observation

Value

2021-10-07.12988

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

43 (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

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 2017MJ8 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	1951-11-19 03:22	< 1 min	0.1298117	0.1298087	0.0000010
EARTH	1956-11-22 11:04	< 1 min	0.1478687	0.1478565	0.0000041
EARTH	2032-05-31 17:01	< 1 min	0.1821399	0.1821352	0.0000016
EARTH	2037-06-07 05:45	< 1 min	0.1625202	0.1625192	0.0000003
EARTH	2042-06-12 22:45	< 1 min	0.1896167	0.1896091	0.0000025
EARTH	2053-11-14 10:08	< 1 min	0.1807607	0.1807455	0.0000051
EARTH	2058-11-19 05:09	< 1 min	0.1347545	0.1347495	0.0000017
EARTH	2063-11-23 21:19	< 1 min	0.1477366	0.1477257	0.0000036

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
298.65971441	316.78515783	0.13097699	MINIMUM
60.21559041	154.37471610	0.16263256	MINIMUM
359.60556779	54.60281651	0.43568746	SADDLE
179.69364222	237.04563888	1.25340896	SADDLE
1.40409486	238.09760914	1.56906652	SADDLE
180.77906068	57.57773707	3.24552444	MAXIMUM

Download:

MOID Plots

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