2012 QG42: ephemerides

A Minor-Planet Follow-Up Page

2012 QG42

This page provides ephemeries for ths potentially hazardous asteroid

A PDF document describing the use of the MPES is available.

Information on any known problems with this
service is available.


 

Astrometric observations of any of the following objects should be sent directly to mpc@cfa.harvard.edu. Updated orbits will be available automatically through this page.

 

Display

ephemerides or  summary
The following objects are available:

    2012 QG42


Options:

By default, ephemerides are geocentric, begin now and are for 20 days at 1
day intervals.

Start date for ephemerides:

Number of dates to output

Ephemeris interval:

Ephemeris
units:

days   hours   minutes   seconds

For daily ephemerides, enter desired offset from 0h UT:

hours

Observatory code:

Display positions in:

truncated sexagesimal or

full sexagesimal or   decimal units

Display motions as:

“/sec   “/min   “/hr   °/day

Total motion and direction

Separate R.A. and Decl. sky motions   Separate R.A. and Decl. coordinate motions

Suppress output if sun above local horizon   Suppress output if object below local horizon

Generate perturbed ephemerides for unperturbed orbits

Measure azimuths:

westwards from the south meridian  eastwards from the north meridian

Also display elements for epoch

Format for elements output:

none MPC 1-line MPC 8-line
SkyMap (SkyMap Software) Guide (Project Pluto) xephem (E. Downey)
Home Planet (J. Walker) MyStars! (Relative Data Products) TheSky (Software Bisque)
Starry Night (Sienna Software) Deep Space (D. S. Chandler) PC-TCS (D. Harvey)
Earth Centered Universe (Nova Astronomics) Dance of the Planets (ARC) MegaStar V4.x (E.L.B. Software)
SkyChart 2000.0 (Southern Stars Software) Voyager II (Carina Software) SkyTools (CapellaSoft)
Autostar (Meade Instruments)

 

 

If you select 8-line MPC format, you may display the residual block for the
objects selected:

Show residuals blocks. Show only residual lines containing observations from code

.
If you select 8-line MPC format the elements will be displayed with the ephemerides.
If you select any format other than 8-line MPC format, only the elements are returned.
In such cases your browser should download the elements file and save it
to your local disk.

 


Supplementary Information

 

Summary 

The summary lists the current J2000.0 coordinates, visual magnitude and
solar elongation of the selected minor planets, as well as information on
the date of last observation (where available), forthcoming opposition
data and details on the latest published orbit. The opposition data lists
the date of the next opposition and the declination and visual magnitude
at that time. 

 

Formats 

The list of available formats for the orbital elements was correct at the
time this document was prepared. It is possible that the Minor Planet
Center now supports further formats. If you select the summary option,
any newly supported formats will be listed. 

 

Elements 

The elements supplied are the latest published elements for the
specified objects. Elements will be found even if the designation you
enter is a non-principal designation in an identification or if the object
has been numbered. 

Ephemerides can be supplied for objects with only Väisälä
elements, but the elements themselves are not supplied.

 

Ephemerides 

The ephemerides supplied for minor planets and comets are
perturbed (if the orbits were computed with perturbations) and can be
generated over the time period 1900 to 2040. Objects with unperturbed
orbit solutions will return unperturbed ephemerides. Objects must be
identified in images by their motion, not by their apparent closeness
to a predicted position. 

The time-scale of the supplied ephemerides is UTC.

If you desire a topocentric ephemeris, enter your observatory code
in the appropriate box. When local circumstances are displayed, the
azimuths are reckoned westwards from the south meridian.

As an aide-mémoire, the packed
form of the object’s designation (as used on the
astrometric
observation record
)
is displayed immediately above the ephemeris.


This service utilises the Minor Planet Ephemeris Service, courtesy of
the IAU’s Minor Planet
Center
.

The calculations will be performed on the
Tamkin
Foundation Computing Network
.


Valid HTML 4.01!

 

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