Asteroids

2018RC2 help

Last update: 2025-11-24 16:53 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.820

Aphelion (Q)

1.670

Eccentricity (e)

0.341

Inclination (i)

14.7

deg

Orbit period (P)

507.6

Earth MOID

0.00262

U parameter

1.0

Next Earth close approach

Date

2036-08-19

Nominal distance (from Earth center)

0.11908

17814558

Maximum Brightness

20.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.2

mag

Diameter

60 - 140*

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

1.245319

1-sigma variation

3.038E-8

Unit

Eccentricity (e)

Value

0.341227

1-sigma variation

1.165E-7

Unit

Inclination (i)

Value

14.7404

1-sigma variation

1.123E-5

Unit

Long. of Ascending Node (Ω)

Value

347.0041

1-sigma variation

6.720E-7

Unit

Arg. of Perihelion (ω)

Value

252.4413

1-sigma variation

2.875E-5

Unit

Mean Anomaly (M)

Value

144.58124

1-sigma variation

3.752E-6

Unit

Perihelion distance

Value

0.820382

1-sigma variation

Unit

Aphelion distance

Value

1.670255

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.218867

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.004134

1-sigma variation

Unit

MOID

Value

0.002621

1-sigma variation

Unit

Orbit Period

Value

507.5971

1-sigma variation

Unit

U parameter

Value

1.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.22766E-16	-2.84823E-15	-3.04346E-13	9.21686E-15	-7.82160E-13	8.06914E-14
e	-2.84823E-15	1.35611E-14	8.78869E-13	-1.44991E-14	3.29694E-12	-4.28428E-13
i	-3.04346E-13	8.78869E-13	1.26063E-10	-3.29670E-12	2.45389E-10	-2.31853E-11
Ω	9.21686E-15	-1.44991E-14	-3.29670E-12	4.51567E-13	-5.25378E-12	4.59992E-14
ω	-7.82160E-13	3.29694E-12	2.45389E-10	-5.25378E-12	8.26511E-10	-1.01692E-10
M	8.06914E-14	-4.28428E-13	-2.31853E-11	4.59992E-14	-1.01692E-10	1.40759E-11

Date of computation: 2025-11-24 16:53 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

23.209

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

60 - 140*

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

2374

Unit

Source

[1]

Unobserved

Value

344

Unit

Source

[1]

Normalized RMS of residuals

Value

0.553579

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-09-07.27493

Unit

Source

[2]

Last Observation

Value

2025-03-08.063318

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

381 (6)

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 2018RC2 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	1967-08-18 20:52	< 1 min	0.1673701	0.1673635	0.0000022
EARTH	1974-03-03 16:54	< 1 min	0.0835756	0.0835743	0.0000004
EARTH	1978-08-20 13:11	< 1 min	0.1161123	0.1161122	0.0000000
EARTH	1985-03-11 08:50	< 1 min	0.0511914	0.0511809	0.0000035
EARTH	2014-02-26 14:04	< 1 min	0.1907260	0.1907219	0.0000013
EARTH	2018-08-18 23:40	< 1 min	0.1269278	0.1269272	0.0000002
EARTH	2025-03-08 11:44	< 1 s	0.0050593	0.0050593	0.0000000
EARTH	2036-08-19 12:55	< 1 min	0.1190830	0.1190805	0.0000008
EARTH	2050-03-19 01:00	< 1 min	0.1355962	0.1355792	0.0000056
EARTH	2057-02-27 15:00	< 1 min	0.1670069	0.1669875	0.0000065
EARTH	2068-08-17 13:15	< 1 min	0.1690151	0.1689998	0.0000051
EARTH	2082-03-08 00:06	< 1 min	0.0135145	0.0134968	0.0000059
EARTH	2100-03-09 08:31	13.0	0.0051531	0.0050664	0.0000355
EARTH	2111-08-19 14:22	47.6	0.1558466	0.1226490	0.0135213

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
306.04598836	65.24103114	0.00262077	MINIMUM
66.29475056	225.41158520	0.11556093	MINIMUM
8.65432256	149.65364181	0.30175578	SADDLE
184.45785552	321.17855002	0.75251171	SADDLE
3.36452858	321.76251537	1.79416389	SADDLE
179.97256873	137.98017651	2.66494966	MAXIMUM

Download:

MOID Plots

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