Asteroids

2018RY1 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.544

Aphelion (Q)

1.102

Eccentricity (e)

0.339

Inclination (i)

1.2

deg

Orbit period (P)

272.6

Earth MOID

0.00078

U parameter

0.3

Next Earth close approach

Date

2027-10-16

Nominal distance (from Earth center)

0.01681

2515432

Maximum Brightness

20.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.5

mag

Diameter

30 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-09-07

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

0.822825

1-sigma variation

2.480E-9

Unit

Eccentricity (e)

Value

0.338747

1-sigma variation

8.670E-8

Unit

Inclination (i)

Value

1.1696

1-sigma variation

2.723E-6

Unit

Long. of Ascending Node (Ω)

Value

199.5633

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

325.0527

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

51.60534

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.544095

1-sigma variation

Unit

Aphelion distance

Value

1.101554

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.432848

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.010005

1-sigma variation

Unit

MOID

Value

0.000783

1-sigma variation

Unit

Orbit Period

Value

272.6210

1-sigma variation

Unit

U parameter

Value

0.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.15172E-18	-1.67684E-16	-5.01445E-16	-2.44598E-14	6.11114E-15	1.52943E-14
e	-1.67684E-16	7.51773E-15	6.89423E-14	-1.98045E-13	-3.94492E-14	1.12204E-12
i	-5.01445E-16	6.89423E-14	7.41552E-12	-1.57184E-10	1.43857E-10	2.95149E-11
Ω	-2.44598E-14	-1.98045E-13	-1.57184E-10	4.81808E-9	-4.50131E-9	-5.65121E-10
ω	6.11114E-15	-3.94492E-14	1.43857E-10	-4.50131E-9	4.44491E-9	9.33163E-11
M	1.52943E-14	1.12204E-12	2.95149E-11	-5.65121E-10	9.33163E-11	9.24302E-10

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

24.533

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

30 - 70*

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

2247

Unit

Source

[1]

Unobserved

Value

342

Unit

Source

[1]

Normalized RMS of residuals

Value

0.656255

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-08-14.475979

Unit

Source

[2]

Last Observation

Value

2024-10-08.10176

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

169 (5)

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 2018RY1 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	1960-08-04 09:03	16.4	0.0522731	0.0483676	0.0013018
EARTH	1963-09-19 23:22	588.1	0.0868428	0.0860393	0.0002679
EARTH	1966-10-17 11:35	34.8	0.1248794	0.1212569	0.0012075
EARTH	1974-08-06 23:48	26.0	0.1910965	0.1893459	0.0005835
EARTH	1977-08-16 20:25	97.7	0.0590514	0.0584490	0.0002008
EARTH	1980-10-15 14:07	< 1 min	0.0011589	0.0011577	0.0000004
EARTH	1983-10-17 13:00	< 1 min	0.0272744	0.0272737	0.0000002
VENUS	1984-02-15 20:29	< 1 s	0.0178959	0.0178956	0.0000001
EARTH	1986-10-16 21:13	< 1 min	0.1122313	0.1122279	0.0000011
VENUS	1986-11-24 23:09	< 1 min	0.0268790	0.0268754	0.0000012
VENUS	1998-04-13 22:48	< 1 min	0.0394280	0.0394265	0.0000005
VENUS	2001-01-19 16:10	< 1 s	0.0141339	0.0141333	0.0000002
EARTH	2009-08-03 00:19	< 1 min	0.1479922	0.1479918	0.0000001
EARTH	2012-08-01 19:31	< 1 min	0.0628137	0.0628133	0.0000001
EARTH	2015-08-05 12:02	< 1 min	0.0234531	0.0234529	0.0000001
EARTH	2018-08-21 00:47	< 1 min	0.0779057	0.0779055	0.0000001
EARTH	2021-09-13 14:36	< 1 min	0.0932942	0.0932940	0.0000001
EARTH	2024-10-06 12:10	< 1 s	0.0548780	0.0548778	0.0000001
EARTH	2027-10-16 17:57	< 1 min	0.0168146	0.0168145	0.0000001
EARTH	2030-10-15 21:00	< 1 min	0.1553345	0.1553340	0.0000001
VENUS	2039-10-25 00:18	< 1 min	0.0408790	0.0408770	0.0000007
EARTH	2047-08-02 22:44	< 1 min	0.0952365	0.0952352	0.0000004
EARTH	2050-08-07 01:04	< 1 min	0.0316104	0.0316098	0.0000002
VENUS	2051-03-10 10:42	< 1 s	0.0258265	0.0258260	0.0000002
EARTH	2053-09-01 20:22	< 1 min	0.0921643	0.0921641	0.0000001
VENUS	2053-12-15 08:16	< 1 min	0.0206449	0.0206441	0.0000003
EARTH	2056-10-06 10:57	< 1 min	0.0546673	0.0546667	0.0000002
EARTH	2059-10-17 15:17	< 1 min	0.0661440	0.0661428	0.0000004
VENUS	2071-10-19 21:50	< 1 min	0.0171118	0.0171099	0.0000006
EARTH	2076-08-03 07:20	< 1 min	0.1554575	0.1554548	0.0000009
EARTH	2079-08-03 05:38	< 1 min	0.0359152	0.0359129	0.0000008
EARTH	2082-08-13 18:59	< 1 min	0.0598454	0.0598443	0.0000004
EARTH	2085-09-07 09:41	< 1 min	0.0948057	0.0948054	0.0000001
VENUS	2085-12-14 05:33	< 1 min	0.0350226	0.0350217	0.0000003
EARTH	2088-09-29 01:18	< 1 min	0.0762504	0.0762493	0.0000004
EARTH	2091-10-14 16:20	< 1 min	0.0171749	0.0171720	0.0000010
VENUS	2093-08-18 00:23	< 1 s	0.0181841	0.0181829	0.0000004
EARTH	2094-10-16 22:33	< 1 min	0.0346604	0.0346581	0.0000008
VENUS	2096-05-27 11:09	< 1 min	0.0203930	0.0203889	0.0000014
EARTH	2097-10-15 18:37	< 1 min	0.1447041	0.1447000	0.0000014
VENUS	2107-10-14 12:04	< 1 min	0.0111156	0.0111151	0.0000002
VENUS	2110-07-21 16:53	< 1 min	0.0383811	0.0383533	0.0000093
EARTH	2114-08-05 20:59	< 1 min	0.1955274	0.1954928	0.0000115
EARTH	2117-08-03 06:28	< 1 min	0.0726687	0.0726288	0.0000133
EARTH	2120-08-08 15:23	2.7	0.0368801	0.0368504	0.0000099
VENUS	2121-12-07 09:46	1.3	0.0116169	0.0116072	0.0000032
EARTH	2123-09-06 23:05	21.1	0.0927399	0.0927382	0.0000006

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
231.27766631	280.61726426	0.00081268	MINIMUM
133.51418481	209.28064716	0.01920326	MINIMUM
181.81791730	244.46811950	0.09497607	SADDLE
4.30737606	66.97259124	0.44890912	SADDLE
4.41042414	247.09747439	1.55085655	SADDLE
182.13385481	64.68082713	2.09393450	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out