Asteroids

2018KR

Last update: 2023-06-03 23:50 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Aten

Perihelion (q)

0.700

Aphelion (Q)

1.069

Eccentricity (e)

0.209

Inclination (i)

1.1

deg

Orbit period (P)

303.9

Earth MOID

0.01215

U parameter

7.0

Next Earth close approach

Date

2023-06-07

Nominal distance (from Earth center)

0.0166

2482590

Maximum Brightness

120.6

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

26.4

mag

Diameter

19*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-05-17

Observatory

Mt. Lemmon Survey

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)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.884677

1-sigma variation

0.000091

Unit

Eccentricity (e)

Value

0.208661

1-sigma variation

0.000201

Unit

Inclination (i)

Value

1.0904

1-sigma variation

0.0010

Unit

Ascending Node (Ω)

Value

134.1385

1-sigma variation

0.0053

Unit

Arg. of Perihelion (ω)

Value

264.5770

1-sigma variation

0.0068

Unit

Mean Anomaly (M)

Value

112.32351

1-sigma variation

0.33674

Unit

Perihelion

Value

0.700080

1-sigma variation

Unit

Aphelion

Value

1.069274

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.122795

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.185039

1-sigma variation

Unit

MOID

Value

0.012147

1-sigma variation

Unit

Orbit Period

Value

303.9313

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.30763E-9	-1.82804E-8	-9.30828E-8	-4.75385E-7	6.11400E-7	-3.06926E-5
e	-1.82804E-8	4.02252E-8	2.04830E-7	1.04544E-6	-1.34488E-6	6.75371E-5
i	-9.30828E-8	2.04830E-7	1.04307E-6	5.31528E-6	-6.84129E-6	3.43898E-4
Ω	-4.75385E-7	1.04544E-6	5.31528E-6	2.83959E-5	-3.60231E-5	1.75605E-3
ω	6.11400E-7	-1.34488E-6	-6.84129E-6	-3.60231E-5	4.59141E-5	-2.25862E-3
M	-3.06926E-5	6.75371E-5	3.43898E-4	1.75605E-3	-2.25862E-3	1.13394E-1

Date of computation: 2023-05-08 23:51 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

26.39

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

19*

Unit

Source

[3]

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 ODIM	ESA orbit determination and impact monitoring system
[2]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[3]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

1827

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.768038

Unit

arcsec

Source

[1]

First Observation

Value

2018-05-17.33896

Unit

Source

[2]

Last Observation

Value

2018-06-03.24495

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

52 (1)

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 2018KR from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1952-03-21 21:50	> 1 d	0.0338008	0.0121541	0.0082366
EARTH	1957-03-15 09:28	837.3	0.1679785	0.1158314	0.0173849
EARTH	1968-06-11 06:12	123.0	0.1695103	0.1693919	0.0000411
EARTH	1973-06-12 02:30	1371.9	0.0246740	0.0170877	0.0096983
EARTH	1978-06-01 02:15	> 1 d	0.0411825	0.0207520	0.0084745
EARTH	1983-04-22 06:01	> 1 d	0.0655729	0.0641027	0.0004921
EARTH	1988-03-30 16:03	> 1 d	0.0462375	0.0317141	0.0048925
EARTH	1988-08-06 05:23	> 1 w	0.1959264	0.1825194	0.0044762
EARTH	1993-03-21 06:18	> 1 d	0.0266062	0.0107354	0.0108962
VENUS	1997-12-24 04:25	1323.3	0.0252373	0.0108948	0.0057465
EARTH	1998-04-02 19:03	> 1 d	0.0522795	0.0435723	0.0029132
EARTH	1998-08-04 19:48	> 1 d	0.1946178	0.1866756	0.0026504
EARTH	2003-03-20 21:38	724.5	0.0282552	0.0229897	0.0017948
EARTH	2008-03-25 02:34	> 1 d	0.0398365	0.0307881	0.0030505
VENUS	2009-07-10 11:37	1272.3	0.0462781	0.0346103	0.0049814
EARTH	2013-04-29 08:17	> 1 d	0.0648661	0.0639015	0.0003221
EARTH	2018-05-28 18:59	< 1 min	0.0402997	0.0401762	0.0000412
EARTH	2023-06-07 03:41	816.7	0.0165951	0.0162351	0.0008606
VENUS	2026-04-08 23:52	> 1 d	0.0114412	0.0082393	0.0198114
EARTH	2028-06-05 03:12	> 1 d	0.0277416	0.0153291	0.0094428
EARTH	2033-04-02 06:15	> 1 d	0.0598510	0.0557403	0.0018165
EARTH	2033-08-04 20:07	> 1 w	0.1981229	0.1798273	0.0062779
VENUS	2035-05-16 19:34	> 1 d	0.0308521	0.0240320	0.0104480
EARTH	2038-03-10 20:27	> 1 d	0.0431031	0.0090099	0.0270995
EARTH	2054-06-09 06:48	1197.1	0.1813346	0.1200935	0.0204846
EARTH	2059-06-10 05:13	1307.5	0.0158998	0.0157204	0.0008712
EARTH	2064-04-21 18:45	> 1 w	0.0720159	0.0538216	0.0061597
VENUS	2065-08-08 20:22	> 1 w	0.0192076	0.0097107	0.0178281
EARTH	2069-03-13 01:20	> 1 d	0.0195133	0.0195048	0.0003978
EARTH	2074-03-10 17:34	> 1 d	0.0946713	0.0165972	0.2020326
VENUS	2086-07-07 10:06	> 1 mo	0.0205157	0.0135869	0.0893788
EARTH	2095-06-09 05:33	> 1 w	0.1463047	0.0143060	0.6673303
EARTH	2100-06-11 00:41	> 1 d	0.0588887	0.0146257	0.6626173
EARTH	2105-06-07 21:35	> 1 w	0.0163008	0.0147846	0.0806531
EARTH	2110-01-21 17:14	> 1 mo	0.1834091	0.0518106	1.3762029
EARTH	2110-05-12 07:29	> 1 mo	0.0648296	0.0091275	0.6742194
EARTH	2115-03-31 17:46	> 1 mo	0.0570494	0.0198336	1.4239161
EARTH	2115-08-04 22:18	> 1 mo	0.1981900	0.0461900	1.7190899
VENUS	2119-01-15 04:18	> 1 mo	0.0273540	0.0245044	1.2140835
EARTH	2120-03-13 01:56	> 1 mo	0.0212480	0.0212413	0.0328794

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