Asteroids

509935 2009QL8 help

Last update: 2024-04-24 23:53 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.887

Aphelion (Q)

2.976

Eccentricity (e)

0.541

Inclination (i)

4.2

deg

Orbit period (P)

980.2

Earth MOID

0.02798

U parameter

0.0

Next Earth close approach

Date

2060-10-04

Nominal distance (from Earth center)

0.0891

13328971

Maximum Brightness

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

19.5

mag

Diameter

300 - 800*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2009-08-20

Observatory

Catalina Sky 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)
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

1.931178

1-sigma variation

5.067E-9

Unit

Eccentricity (e)

Value

0.540879

1-sigma variation

3.277E-8

Unit

Inclination (i)

Value

4.2409

1-sigma variation

4.312E-6

Unit

Long. of Ascending Node (Ω)

Value

84.4718

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

339.6472

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

129.25874

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.886645

1-sigma variation

Unit

Aphelion distance

Value

2.975711

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.077011

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.757034

1-sigma variation

Unit

MOID

Value

0.027985

1-sigma variation

Unit

Orbit Period

Value

980.2387

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.56736E-17	1.34455E-16	-2.77622E-15	9.11748E-15	-2.33859E-14	-2.38243E-14
e	1.34455E-16	1.07415E-15	-2.63780E-14	-2.53373E-13	7.24406E-14	-7.38857E-14
i	-2.77622E-15	-2.63780E-14	1.85899E-11	2.00942E-10	-1.92742E-10	-1.75383E-13
Ω	9.11748E-15	-2.53373E-13	2.00942E-10	5.97336E-9	-5.75849E-9	-1.29275E-10
ω	-2.33859E-14	7.24406E-14	-1.92742E-10	-5.75849E-9	5.65403E-9	9.45941E-11
M	-2.38243E-14	-7.38857E-14	-1.75383E-13	-1.29275E-10	9.45941E-11	4.73915E-11

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

19.471

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

300 - 800*

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

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude
[3]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

3574

Unit

Source

[1]

Unobserved

Value

1788

Unit

Source

[1]

Normalized RMS of residuals

Value

0.448838

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2009-08-20.39152

Unit

Source

[2]

Last Observation

Value

2019-06-03.09803

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

272 (2)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2017-12-29

Unit

Source

[3]

Last Observation

Value

2017-12-29

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

1 (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 509935 2009QL8 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	1958-09-26 12:42	< 1 min	0.1496254	0.1496236	0.0000006
EARTH	1966-11-14 06:44	< 1 min	0.1034658	0.1034656	0.0000001
EARTH	1975-01-12 07:53	< 1 min	0.0484625	0.0484601	0.0000008
EARTH	2009-10-06 00:23	< 1 min	0.0806958	0.0806955	0.0000001
EARTH	2017-12-13 10:01	< 1 min	0.0881846	0.0881845	0.0000001
EARTH	2060-10-04 14:18	< 1 min	0.0890987	0.0890968	0.0000006
EARTH	2068-11-27 15:35	< 1 min	0.1023177	0.1023175	0.0000001
EARTH	2077-01-16 06:07	< 1 min	0.0784311	0.0784291	0.0000007
EARTH	2111-09-29 10:42	< 1 min	0.1603266	0.1603217	0.0000016
EARTH	2119-11-18 14:09	< 1 min	0.1041167	0.1041163	0.0000002

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