Asteroids

2018RY6 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.772

Aphelion (Q)

3.431

Eccentricity (e)

0.633

Inclination (i)

5.2

deg

Orbit period (P)

1112.7

Earth MOID

0.02912

U parameter

9.0

Next Earth close approach

Date

2079-03-23

Nominal distance (from Earth center)

0.11427

17094686

Maximum Brightness

20.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.7

mag

Diameter

80 - 170*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-09-12

Observatory

University of Arizona 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

2.101425

1-sigma variation

0.057265

Unit

Eccentricity (e)

Value

0.632598

1-sigma variation

0.014052

Unit

Inclination (i)

Value

5.2168

1-sigma variation

0.1267

Unit

Long. of Ascending Node (Ω)

Value

172.8312

1-sigma variation

0.2391

Unit

Arg. of Perihelion (ω)

Value

84.5684

1-sigma variation

0.5243

Unit

Mean Anomaly (M)

Value

220.76944

1-sigma variation

41.35770

Unit

Perihelion distance

Value

0.772067

1-sigma variation

Unit

Aphelion distance

Value

3.430782

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.195205

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.335015

1-sigma variation

Unit

MOID

Value

0.029115

1-sigma variation

Unit

Orbit Period

Value

1112.6771

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.27927E-3	8.04670E-4	7.25206E-3	1.36918E-2	-3.00002E-2	-2.36835E0
e	8.04670E-4	1.97452E-4	1.77964E-3	3.35975E-3	-7.36202E-3	-5.81147E-1
i	7.25206E-3	1.77964E-3	1.60602E-2	3.02874E-2	-6.64401E-2	-5.23754E0
Ω	1.36918E-2	3.35975E-3	3.02874E-2	5.71696E-2	-1.25293E-1	-9.88843E0
ω	-3.00002E-2	-7.36202E-3	-6.64401E-2	-1.25293E-1	2.74866E-1	2.16665E1
M	-2.36835E0	-5.81147E-1	-5.23754E0	-9.88843E0	2.16665E1	1.71046E3

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

22.717

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

80 - 170*

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

2816

Unit

Source

[1]

Normalized RMS of residuals

Value

0.660723

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-09-12.2834

Unit

Source

[2]

Last Observation

Value

2018-09-17.40536

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (0)

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 2018RY6 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
7 Iris	1981-07-31 10:16	> 1 mo	0.0165137	0.0075198	23.2757297
EARTH	2009-03-30 13:40	> 1 mo	0.0268699	0.0265430	0.3522865
EARTH	2012-04-29 18:36	> 1 mo	0.1986298	0.0066647	1.0532989
EARTH	2018-08-03 12:56	60.0	0.1418609	0.1318347	0.0033422
EARTH	2021-08-27 00:32	> 1 mo	0.1294719	0.0415267	0.8330289
MARS	2058-04-19 01:34	> 1 mo	0.0431893	0.0282713	6.6276511
EARTH	2079-03-23 20:21	> 1 mo	0.1142709	0.0273149	12.0758230
EARTH	2082-04-08 06:33	> 1 mo	0.0920555	0.0273679	9.6745847
EARTH	2094-08-15 00:53	> 1 w	0.0823240	0.0260850	0.1206078
EARTH	2097-08-30 18:25	> 1 mo	0.1396258	0.0321694	2.5705677

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
325.45897698	88.51383353	0.02850540	MINIMUM
35.60070751	225.12135612	0.04276171	MINIMUM
0.80103414	157.26901302	0.25886692	SADDLE
0.63344307	336.92283771	1.75380030	SADDLE
180.16149718	336.27133067	2.45142244	SADDLE
180.13228445	156.26117775	4.44420970	MAXIMUM

Download:

MOID Plots

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