Asteroids

2018CL help

Last update: 2024-04-26 23:50 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.648

Aphelion (Q)

1.060

Eccentricity (e)

0.241

Inclination (i)

11.9

deg

Orbit period (P)

288.4

Earth MOID

0.00501

U parameter

6.1

Next Earth close approach

Date

2033-02-04

Nominal distance (from Earth center)

0.03446

5155214

Maximum Brightness

20.4

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

25.5

mag

Diameter

22 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-02-05

Observatory

Palomar Mountain--ZTF

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.854325

1-sigma variation

0.000020

Unit

Eccentricity (e)

Value

0.241227

1-sigma variation

0.000072

Unit

Inclination (i)

Value

11.8503

1-sigma variation

0.0045

Unit

Long. of Ascending Node (Ω)

Value

136.2662

1-sigma variation

3.741E-6

Unit

Arg. of Perihelion (ω)

Value

141.6782

1-sigma variation

0.0006

Unit

Mean Anomaly (M)

Value

160.37418

1-sigma variation

0.11617

Unit

Perihelion distance

Value

0.648239

1-sigma variation

Unit

Aphelion distance

Value

1.060411

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.006937

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.337056

1-sigma variation

Unit

MOID

Value

0.005015

1-sigma variation

Unit

Orbit Period

Value

288.4252

1-sigma variation

Unit

U parameter

Value

6.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.10320E-10	-1.45569E-9	-9.06928E-8	6.55123E-11	7.63231E-9	-2.35302E-6
e	-1.45569E-9	5.17530E-9	3.22433E-7	-2.31463E-10	-2.84313E-8	8.35100E-6
i	-9.06928E-8	3.22433E-7	2.00928E-5	-1.43521E-8	-1.77116E-6	5.20286E-4
Ω	6.55123E-11	-2.31463E-10	-1.43521E-8	1.39936E-11	1.09781E-9	-3.75406E-7
ω	7.63231E-9	-2.84313E-8	-1.77116E-6	1.09781E-9	3.09220E-7	-4.41667E-5
M	-2.35302E-6	8.35100E-6	5.20286E-4	-3.75406E-7	-4.41667E-5	1.34945E-2

Date of computation: 2024-04-23 10:08 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

25.454

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

22 - 50*

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

[-]

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Sources

No.	Name	Additional
[1]	ESA ODIM	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

2271

Unit

Source

[1]

Normalized RMS of residuals

Value

0.891553

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-02-05.23154

Unit

Source

[2]

Last Observation

Value

2018-02-07.0942

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

66 (10)

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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2018CL from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1954-12-20 09:41	> 1 mo	0.1903948	0.1684298	0.1485899
EARTH	1959-02-07 20:28	> 1 d	0.1079673	0.0102151	0.4145712
EARTH	1970-02-06 13:37	234.2	0.0048410	0.0048400	0.0000102
EARTH	1981-01-29 18:17	663.9	0.0813282	0.0727833	0.0028606
VENUS	1983-01-13 10:08	721.8	0.0333264	0.0245782	0.0032662
EARTH	1992-01-16 23:07	416.9	0.1365156	0.1335346	0.0009957
VENUS	1997-03-14 05:11	502.9	0.0359968	0.0253305	0.0039339
EARTH	2002-12-19 08:42	923.5	0.1882028	0.1848867	0.0011443
EARTH	2007-02-07 23:02	23.4	0.0952387	0.0869167	0.0027754
VENUS	2016-11-15 14:44	25.3	0.0227649	0.0227198	0.0000159
EARTH	2018-02-06 05:08	< 1 s	0.0060197	0.0060138	0.0000020
EARTH	2033-02-04 02:20	323.6	0.0344605	0.0259350	0.0028596
EARTH	2048-01-19 09:25	827.5	0.1284273	0.1222158	0.0020830
EARTH	2052-02-07 09:07	89.9	0.1270746	0.1128015	0.0047600
EARTH	2062-12-31 12:12	> 1 d	0.1714988	0.1617897	0.0033895
EARTH	2067-02-07 14:39	49.5	0.0609586	0.0370987	0.0079902
EARTH	2077-12-25 04:24	229.5	0.1800434	0.1792936	0.0002512
VENUS	2080-11-11 10:45	418.2	0.0337169	0.0240533	0.0035192
EARTH	2082-02-07 10:14	83.9	0.0351478	0.0252619	0.0033224
VENUS	2086-05-22 10:11	296.0	0.0256219	0.0221566	0.0012538
EARTH	2092-12-23 06:03	689.9	0.1814721	0.1788489	0.0008889
EARTH	2097-02-07 05:35	8.2	0.0659785	0.0528058	0.0044016
EARTH	2108-01-21 11:05	> 1 d	0.1231127	0.1106818	0.0041976
EARTH	2112-02-07 06:58	161.7	0.1939865	0.1760273	0.0059884
VENUS	2117-02-21 14:02	822.0	0.0437554	0.0339773	0.0034312
EARTH	2123-02-05 07:20	93.4	0.0350356	0.0320817	0.0009857

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