Asteroids

2009QR help

Last update: 2024-04-19 23:53 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.981

Aphelion (Q)

1.674

Eccentricity (e)

0.261

Inclination (i)

3.5

deg

Orbit period (P)

558.6

Earth MOID

0.00062

U parameter

9.0

Next Earth close approach

Date

2049-09-08

Nominal distance (from Earth center)

0.02651

3965563

Maximum Brightness

25.1

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

27.3

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2009-08-17

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

1.327419

1-sigma variation

0.035358

Unit

Eccentricity (e)

Value

0.260753

1-sigma variation

0.014973

Unit

Inclination (i)

Value

3.5000

1-sigma variation

0.1998

Unit

Long. of Ascending Node (Ω)

Value

150.2269

1-sigma variation

0.2064

Unit

Arg. of Perihelion (ω)

Value

211.3887

1-sigma variation

4.0335

Unit

Mean Anomaly (M)

Value

124.00434

1-sigma variation

1.85499

Unit

Perihelion distance

Value

0.981290

1-sigma variation

Unit

Aphelion distance

Value

1.673548

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.603056

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.001172

1-sigma variation

Unit

MOID

Value

0.000618

1-sigma variation

Unit

Orbit Period

Value

558.6125

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.25018E-3	5.29410E-4	-7.06322E-3	7.29830E-3	-1.42616E-1	-6.55887E-2
e	5.29410E-4	2.24187E-4	-2.99103E-3	3.09058E-3	-6.03931E-2	-2.77746E-2
i	-7.06322E-3	-2.99103E-3	3.99054E-2	-4.12335E-2	8.05745E-1	3.70559E-1
Ω	7.29830E-3	3.09058E-3	-4.12335E-2	4.26059E-2	-8.32562E-1	-3.82892E-1
ω	-1.42616E-1	-6.03931E-2	8.05745E-1	-8.32562E-1	1.62691E1	7.48210E0
M	-6.55887E-2	-2.77746E-2	3.70559E-1	-3.82892E-1	7.48210E0	3.44099E0

Date of computation: 2024-02-21 14:29 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

27.331

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

9 - 20*

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

5355

Unit

Source

[1]

Normalized RMS of residuals

Value

0.510432

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2009-08-17.24302

Unit

Source

[2]

Last Observation

Value

2009-08-22.088752

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

50 (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 2009QR 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	1957-10-31 20:01	> 1 w	0.1207833	0.0497061	0.1836465
EARTH	1968-08-30 20:15	> 1 d	0.0137732	0.0026021	0.0051980
EARTH	1979-10-24 17:08	> 1 d	0.0748605	0.0454626	0.0292388
EARTH	2009-08-20 16:07	< 1 min	0.0087170	0.0087051	0.0000040
EARTH	2023-08-21 21:08	> 1 d	0.0070361	0.0002501	0.0183982
MARS	2036-10-10 18:01	> 1 mo	0.0444473	0.0323975	0.8257764
EARTH	2049-09-08 04:31	> 1 mo	0.0265081	0.0075316	2.7710986
EARTH	2072-08-26 19:54	> 1 mo	0.0078747	0.0006032	30.1261299
EARTH	2103-08-31 03:15	> 1 mo	0.0126916	0.0001639	4056.0728389
MARS	2113-09-18 18:31	> 1 mo	0.0384773	0.0293078	55241.2288301
EARTH	2117-11-06 03:21	> 1 mo	0.1498517	0.0509665	194277.5909903

Download as:

2009QR

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2069-08-25.720	76983.720	0.403	0.000	2.34 ± 0.000	8.02E7	6.71E-9	2.52E-10	-9.46	0


Based on 50 optical observations (of which 1 are rejected as outliers) from 2009/08/17.243 to 2009/08/22.089.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.45 and 2.45 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20240110 090431.326 UTC.

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Download Impactor Table as: