Asteroids

2018RY7 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.867

Aphelion (Q)

1.167

Eccentricity (e)

0.147

Inclination (i)

13.3

deg

Orbit period (P)

374.5

Earth MOID

0.09303

U parameter

2.3

Next Earth close approach

Date

2058-10-12

Nominal distance (from Earth center)

0.11285

16882822

Maximum Brightness

21.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.3

mag

Diameter

40 - 80*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-09-14

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

1.016847

1-sigma variation

1.131E-7

Unit

Eccentricity (e)

Value

0.147187

1-sigma variation

0.000001

Unit

Inclination (i)

Value

13.3452

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

2.6947

1-sigma variation

1.122E-5

Unit

Arg. of Perihelion (ω)

Value

136.7405

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

61.09442

1-sigma variation

0.00045

Unit

Perihelion distance

Value

0.867181

1-sigma variation

Unit

Aphelion distance

Value

1.166514

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.110985

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.098030

1-sigma variation

Unit

MOID

Value

0.093032

1-sigma variation

Unit

Orbit Period

Value

374.5260

1-sigma variation

Unit

U parameter

Value

2.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.27947E-14	8.02743E-14	8.38147E-12	2.37799E-13	3.25469E-12	-5.04951E-11
e	8.02743E-14	5.65851E-13	5.88823E-11	1.71261E-12	2.43954E-11	-3.16812E-10
i	8.38147E-12	5.88823E-11	6.48381E-9	1.69338E-10	3.01706E-9	-3.36753E-8
Ω	2.37799E-13	1.71261E-12	1.69338E-10	1.25866E-10	-1.11042E-10	-8.52821E-10
ω	3.25469E-12	2.43954E-11	3.01706E-9	-1.11042E-10	2.81992E-9	-1.47582E-8
M	-5.04951E-11	-3.16812E-10	-3.36753E-8	-8.52821E-10	-1.47582E-8	2.01537E-7

Date of computation: 2026-06-04 23:11 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

24.328

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

40 - 80*

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

329

Unit

Source

[1]

Unobserved

Value

2546

Unit

Source

[1]

Normalized RMS of residuals

Value

0.450272

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-09-14.3151

Unit

Source

[2]

Last Observation

Value

2019-08-09.42936

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

97 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2018RY7 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	1976-10-14 09:43	2.5	0.1344005	0.1343292	0.0000238
EARTH	1977-10-03 02:27	7.1	0.1050551	0.1050296	0.0000085
EARTH	1978-09-15 10:39	10.4	0.1680807	0.1680268	0.0000180
EARTH	1979-03-07 14:00	13.4	0.1437955	0.1437301	0.0000218
EARTH	1980-04-01 18:39	10.1	0.0937717	0.0937656	0.0000020
EARTH	1981-04-22 22:35	5.7	0.1665728	0.1664909	0.0000273
EARTH	2017-10-14 12:52	< 1 min	0.1330187	0.1330160	0.0000009
EARTH	2018-10-03 02:27	< 1 min	0.1056738	0.1056720	0.0000006
EARTH	2019-09-15 06:39	< 1 min	0.1697699	0.1697666	0.0000011
EARTH	2020-03-07 03:40	< 1 min	0.1428769	0.1428748	0.0000007
EARTH	2021-04-02 08:57	< 1 min	0.0940447	0.0940428	0.0000006
EARTH	2022-04-23 12:34	< 1 min	0.1688062	0.1688006	0.0000019
EARTH	2058-10-12 10:16	3.8	0.1128547	0.1128109	0.0000146
EARTH	2059-09-28 20:08	8.3	0.1196655	0.1196185	0.0000157
EARTH	2060-09-08 07:41	11.0	0.1910974	0.1910392	0.0000194
EARTH	2061-03-15 06:44	12.8	0.1211691	0.1211156	0.0000179
EARTH	2062-04-09 02:57	8.9	0.1042178	0.1041730	0.0000150
EARTH	2098-10-15 11:50	3.0	0.1420283	0.1419312	0.0000324
EARTH	2099-10-04 14:04	9.1	0.1035329	0.1035020	0.0000103
EARTH	2100-09-16 17:26	13.5	0.1658433	0.1657670	0.0000255
EARTH	2101-03-06 04:57	17.9	0.1492956	0.1492138	0.0000273
EARTH	2102-04-02 09:22	13.5	0.0936685	0.0936637	0.0000016
EARTH	2103-04-24 03:47	7.6	0.1647356	0.1646234	0.0000374

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
45.27158840	88.44736284	0.09451492	MINIMUM
241.81257249	273.35162175	0.09967604	MINIMUM
324.17319162	357.24555770	0.23426328	SADDLE
142.45026411	185.93531398	0.26925651	SADDLE
359.05944250	217.11851129	1.87558988	SADDLE
188.65681007	46.96377762	2.14877402	MAXIMUM

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MOID Plots

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