Asteroids

660096 1998SL36 help

Last update: 2024-05-15 23:53 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.809

Aphelion (Q)

1.972

Eccentricity (e)

0.418

Inclination (i)

19.1

deg

Orbit period (P)

599.1

Earth MOID

0.02074

U parameter

0.0

Next Earth close approach

Date

2058-03-12

Nominal distance (from Earth center)

0.06212

9293651

Maximum Brightness

18.2

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

20.2

mag

Diameter

240 - 500*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1998-09-24

Observatory

Steward Observatory, Kitt Peak-Spacewatch

Orbit Visualiser

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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

1.390860

1-sigma variation

3.532E-9

Unit

Eccentricity (e)

Value

0.418046

1-sigma variation

2.007E-8

Unit

Inclination (i)

Value

19.0543

1-sigma variation

9.460E-6

Unit

Long. of Ascending Node (Ω)

Value

353.0832

1-sigma variation

7.246E-6

Unit

Arg. of Perihelion (ω)

Value

116.7960

1-sigma variation

7.903E-6

Unit

Mean Anomaly (M)

Value

133.11947

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.809416

1-sigma variation

Unit

Aphelion distance

Value

1.972304

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.409455

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.028151

1-sigma variation

Unit

MOID

Value

0.020740

1-sigma variation

Unit

Orbit Period

Value

599.1334

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.24754E-17	-5.82922E-17	8.27188E-15	5.91029E-17	6.33398E-15	-2.27528E-14
e	-5.82922E-17	4.02790E-16	-3.33285E-14	-8.95473E-15	-2.20392E-14	1.05628E-13
i	8.27188E-15	-3.33285E-14	8.94838E-11	2.82242E-11	-2.50761E-11	-1.26551E-11
Ω	5.91029E-17	-8.95473E-15	2.82242E-11	5.25065E-11	-5.35729E-11	3.40510E-12
ω	6.33398E-15	-2.20392E-14	-2.50761E-11	-5.35729E-11	6.24636E-11	-1.64176E-11
M	-2.27528E-14	1.05628E-13	-1.26551E-11	3.40510E-12	-1.64176E-11	4.21009E-11

Date of computation: 2024-04-23 11:24 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

20.244

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

240 - 500*

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

8537

Unit

Source

[1]

Unobserved

Value

829

Unit

Source

[1]

Normalized RMS of residuals

Value

0.62053

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1998-09-24.16604

Unit

Source

[2]

Last Observation

Value

2022-02-07.662994

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

242 (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

2017-03-12

Unit

Source

[3]

Last Observation

Value

2017-03-12

Unit

Source

[3]

Delay (Discarded)

Value

2 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

3 (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 660096 1998SL36 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	1953-03-09 12:51	< 1 min	0.0855096	0.0855086	0.0000003
EARTH	1976-03-12 09:22	< 1 min	0.0498468	0.0498444	0.0000008
MARS	1977-05-27 19:20	< 1 min	0.0482473	0.0482464	0.0000003
EARTH	2017-03-16 13:29	< 1 s	0.0214320	0.0214319	0.0000000
EARTH	2058-03-12 01:05	< 1 min	0.0621242	0.0621221	0.0000007
EARTH	2076-03-16 21:29	< 1 s	0.0253956	0.0253954	0.0000001
EARTH	2094-03-28 18:25	< 1 min	0.1984671	0.1984662	0.0000003
EARTH	2117-03-07 07:22	< 1 min	0.1206001	0.1205987	0.0000005

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