Asteroids

2012QD8 help

Last update: 2024-04-25 08:10 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.577

Aphelion (Q)

3.248

Eccentricity (e)

0.698

Inclination (i)

5.6

deg

Orbit period (P)

966.2

Earth MOID

0.00209

U parameter

7.4

Next Earth close approach

Date

2026-03-09

Nominal distance (from Earth center)

0.0133

1989042

Maximum Brightness

16.2

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

23.1

mag

Diameter

60 - 140*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2012-08-17

Observatory

Pan-STARRS 1, Haleakala

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

1.912664

1-sigma variation

0.000319

Unit

Eccentricity (e)

Value

0.698106

1-sigma variation

0.000045

Unit

Inclination (i)

Value

5.5798

1-sigma variation

0.0053

Unit

Long. of Ascending Node (Ω)

Value

348.7185

1-sigma variation

0.0221

Unit

Arg. of Perihelion (ω)

Value

87.7697

1-sigma variation

0.0054

Unit

Mean Anomaly (M)

Value

113.60743

1-sigma variation

1.32883

Unit

Perihelion distance

Value

0.577422

1-sigma variation

Unit

Aphelion distance

Value

3.247905

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.051570

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.015236

1-sigma variation

Unit

MOID

Value

0.002092

1-sigma variation

Unit

Orbit Period

Value

966.1762

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.01964E-7	-1.43127E-8	-1.69628E-6	7.06293E-6	1.71103E-6	4.24321E-4
e	-1.43127E-8	2.00984E-9	2.38109E-7	-9.91386E-7	-2.40062E-7	-5.95622E-5
i	-1.69628E-6	2.38109E-7	2.82204E-5	-1.17503E-4	-2.84609E-5	-7.05902E-3
Ω	7.06293E-6	-9.91386E-7	-1.17503E-4	4.89256E-4	1.18515E-4	2.93922E-2
ω	1.71103E-6	-2.40062E-7	-2.84609E-5	1.18515E-4	2.87406E-5	7.12036E-3
M	4.24321E-4	-5.95622E-5	-7.05902E-3	2.93922E-2	7.12036E-3	1.76580E0

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

23.073

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

60 - 140*

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

4249

Unit

Source

[1]

Normalized RMS of residuals

Value

0.374414

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-08-17.44423

Unit

Source

[2]

Last Observation

Value

2012-09-06.04738

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

42 (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 2012QD8 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	1967-09-20 11:00	> 1 w	0.1812624	0.0181922	0.2620467
EARTH	1975-08-29 10:54	> 1 w	0.1589292	0.0131507	0.2447852
EARTH	1981-03-16 08:50	> 1 w	0.1607781	0.0047816	0.2563508
EARTH	2012-09-09 03:52	< 1 min	0.0434226	0.0433547	0.0000226
VENUS	2020-10-28 20:46	> 1 w	0.0461714	0.0013376	0.0713310
EARTH	2026-03-09 05:49	> 1 d	0.0132959	0.0019086	0.0584528
VENUS	2063-04-16 10:11	> 1 mo	0.0123827	0.0006754	3.3387392
MARS	2065-09-02 00:39	> 1 mo	0.0132992	0.0122171	5.0111405
VENUS	2071-04-17 04:46	> 1 mo	0.0389333	0.0000324	70.5767800

Download as:

2012QD8

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2047-03-08.974	68777.974	-0.265	1.10 ± 0.012	1.43E5	5.88E-6	2.82E-4	-3.73
2050-03-08.680	69873.680	4.018	0.17 ± 0.006	3.27E3	8.60E-8	4.22E-6	-5.62
2079-09-09.525	80650.525	3.787	1.02 ± 0.005	6.95E6	4.47E-11	2.19E-9	-9.23
2090-09-09.008	84668.008	0.961	0.90 ± 0.012	1.69E7	2.05E-8	9.93E-7	-6.65
2113-09-09.197	93068.197	-0.184	0.88 ± 0.004	1.00E8	5.80E-9	2.78E-7	-7.32
2117-09-08.622	94528.622	0.544	0.18 ± 0.010	9.09E7	8.50E-9	4.08E-7	-7.17
2118-09-09.168	94894.168	0.814	0.45 ± 0.006	2.90E7	2.07E-8	9.91E-7	-6.79
2120-09-08.746	95624.746	-0.326	0.87 ± 0.010	2.09E7	2.67E-8	1.28E-6	-6.69


Based on 42 optical observations (of which 1 are rejected as outliers) from 2012/08/17.444 to 2012/09/06.047.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.14 and 1.14 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20240110 090431.458 UTC.

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