NEO Planner V4.3  -  Execute Planning  -  Explanations


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© Copyright: The data comes from official access to web services from MPC 

With comets y/n  V = -30 to xx.x:

Select here whether you want to include comets in the planning or not. Select the weakest magnitude down to which objects should be considered.

Neo Planner calculates observation times in R.A. order of currently visible comets according to the official publication of the MPC and additionally the most recently observed comets from CometasObs.
The reason for including the CometasObs observations lies in the sometimes considerable delay of the MPC in the publication of the last observations.

More information on the inclusion of comets in the planning process can be found here.

With comets, compared to NEO, you have to apply slightly different standards with regard to the Vmag selection. Since comets usually appear spotty on the CCD image,
the maximum usable brightness should be set somewhat higher than with NEO. In addition, comets move at far greater distances from the Earth,
which largely excludes a significant change in measured brightness.
29P SCHWASSMANN/WACHMANN with its regularly occurring outbursts in brightness is certainly an exception here just like outbreaks in other comets,
but is generally not taken into account.

The real brightness of comets is actually often very different from the brightness we find in the ephemeris of the MPC.
Therefore to calculate the exposure times, NEO Planner always uses the average Vmag of the last 10 observations, which are determined from the last publishing by the MPC
with MPEC XXX: OBSERVATIONS AND ORBITS OF COMETS AND A / OBJECTS.

With NEO y/n  V = -xx.x to xx.x:

Select here whether you want to include NEO the planning or not. Select the weakest magnitude down to which objects should be considered.
Entering N/n also means that numbered NEO will not be considered. Select the weakest magnitude down to which objects should be considered.

As a rule, every NEO observer has experience with the maximum NEO observable for him in relation to their brightness and should therefore enter his personal experience value here.
NEO Planner will therefore only select those objects whose Vmag values are numerically below the settings value.
The apparent speed does not play a role at this point when considering the maximum usable brightness.

The following model is used to select the NEO:

First it is checked whether the Vmag of the ephemeris is maximum 0.4 mag weaker than the limit value in the settings. If so, the object will continue to be considered.

Second, if the apparent speed in the ephemeris is less than 100.00 s / min, the average Vmag of the last 10 observations is used for the selection of the object,
otherwise the Vmag of the ephemeris.

The reason for taking into account the apparent speed at the time of the ephemeris is a possible strong change in the Vmag compared to previous observations..
At speeds over 100 seconds / minute at the time of the ephemeris we always use MPC's designated Vmag of the ephemeris for selection.
Otherwise fast objects might not be taken into account.

In additon, during the calculation of the exposure times, the selected NEO are subjected to a special Vmag consideration.
See the explanations for the revise button in the Preparation / Execute Planning tab

NEO from year:

NEO with provisional designations are always included in the planning. Enter the starting year of designations of objects not yet numbered.

These objects have not yet been finally numbered and require further follow-up observations. Recently discovered NEO, in particular, require further observation to improve their orbital elements.
The uncertainty factor U plays a special role in the orbital elements. Objects with a U factor of 3 or greater cannot be safely recovered in coming orbits. U = 0 is the best value.
It is therefore a special and valuable task for amateurs to help improve the orbital elements of the NEO.

NEO to year:

Enter the final year of designations of objects not yet numbered.

With numbered NEO y/n  V = xx.x to xx.x:

Select here whether you want to include numbered asteroids the planning or not. Select the weakest magnitude down to which objects should be considered.

Numbered objects are not in the foreground of the observation priorities. However, there may be reasons for observing objects whose orbit is very well known.
In the case of numbered NEOs such as 99944 Apophis or other asteroids that are passing very close to Earth, there may well be an interest in tracking such NEOs.
In particular, to make meaningful videos for presentation purposes or for other reasons, it can make perfect sense also to follow such objects.
In addition, around the full moon there is a good opportunity for diligent observers to include numbered NEOs in the list to compensate for the lack of other objects.

That is why NEO Planner offers the option of including numbered objects in the selection.

The determination of the observable NEO per observatory code is no longer carried out via the NEAm00.txt of the MPC, but via the new API Web Service of the Horizons system of the JPL.
This significantly reduces the loading time of the NEO's ephemeris, which is good for the overall performance of the Execute process.
The loading of all observable numbered NEO of the coming night is now carried out according to the parameters defined by NEO Planner such as minimum altitude or limitation of magnitude.
If numbered objects are selected, please also enter a limit for the magnitude V here.

All NEOCP object with V = -30 to  xx.x:

Confirming NEOCP objects is both a motivation and a challenge. Experience has shown that observers pay special attention to these objects.
The confirmation of new objects, but also the follow-up observation, is important in order to allow as many measurements as possible to flow into
the calculation of the orbital elements for a retrieval in later orbits.

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The following orbit classes can now also be integrated into the planning.
However, attention should be paid to a narrow selection of brightnesses and not planned to be mixed with other classes. Otherwise there is a risk of very long planning times.

With orbit type Mars Crossers  MCA y/n  V = xx.x to xx.x  with numbered y/n:

Asteroids that cross the orbit of Mars constrained by (1.3 au < q < 1.666 au; a < 3.2 au).
In order to avoid very long loading times, it is advisable to limit the selected objects using narrow Vmag from..to entries.
In addition, no other objects should be integrated into the planning.

With orbit type Jupiter Trojans  TJN y/n  V = xx.x to xx.x  with numbered y/n:

Asteroids trapped in Jupiterís L4/L5 Lagrange points (4.6 au < a < 5.5 au; e < 0.3).
In order to avoid very long loading times, it is advisable to limit the selected objects using narrow Vmag from..to entries.
Jupiter Trojans are very numerous and mostly already numbered. To avoid frustration with the length of time planning or program crashes this orbit class
should be selected with only unnumbered objects or set the Vmag range very narrow: e.g. Vmag from 19.0 to Vmag 19.3

In addition, no other objects should be integrated into the planning.

With orbit type Centaur  CEN y/n  V = xx.x to xx.x  with numbered y/n:

Objects with orbits between Jupiter and Neptune (5.5 au < a < 30.1 au).
In order to avoid very long loading times, it is advisable to limit the selected objects using narrow Vmag from..to entries.
In addition, no other objects should be integrated into the planning.

With orbit type TransNeptunian Object  TNO y/n  V = xx.x to xx.x  with numbered y/n:

Objects with orbits outside Neptune (a > 30.1 au).
In order to avoid very long loading times, it is advisable to limit the selected objects using narrow Vmag from..to entries.
In addition, no other objects should be integrated into the planning.

With orbit type Hyperbolic <Asteroid>  HYA y/n  V = xx.x to xx.x  with numbered y/n:

<Asteroids> (objects other than comets) on hyperbolic orbits (e > 1.0).
This orbit class is very rare and should only be of interest when interstellar objects are newly discovered.

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With own object list y/n:

Depending on the interest, the observer can create his own object list with any asteroids, which can be included in the planning selection area.
Application examples are the self-discovered numbered asteroids, which mostly come from the main belt, or discovered objects that are not yet numbered.

With the help of this function, a previously popular follow-up list of your own objects is no longer necessary.
T
hese objects are included in the planning process and taken into account in the final list, if the selection was successful according to the settings parameters.

Execute start 'auto', empty of special date and time:

If you enter "auto", the local start time of the planning is determined from the current GeoSetting data. First the current sunset and sunrise times are loaded.
Then the offset times from the common restrictions settings are used to calculate the start and end times. In the Revise planning display, this data is displayed as observation slot start and end times.
The calculated start time is used when planning the observation of the first object. Times can be adjusted in the Revise window.

New in version 4.2: To simulate other observation days, leave the 'auto' field empty and enter the desired planning date in local time in the form 'yyyy.MM.dd hh mm ss'.
NEO Planner then calculates the planning data for the date entered. Example: Simulation of a plan from April 13, 2029, the close flyby of (99942) Apophis, as shown in the image.

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ExecutePlanning:

The planning according to the settings and the parameters selected here takes place in differentiated steps, which are processed one after the other.
The planning process can be followed in the web browser on the right and in the progress bar.

First the objects of the current NEOCP are loaded and the observable objects are selected from them.
Then, together with the observable comets, NEO, numbered and own objects selected above, the ephemeris of the coming night session is determined.
After sorting all objects according to R.A. the planning is provided and then the observation times are calculated according to the settings.
The result of the planning can then be displayed in the Revise and Object Information Window, edited and, if desired, made available on a website.

Center position:

In the Execute Planning Window you now have the option to choose between two types of centering objects for the FoV.
 a. Centering the object's start position to the center of the FoV (as before).
 b. Centering the middle position of the object path to the center of the FoV.

By centering on the middle of the object path, you get a much longer path of fast objects per frame.
The adjusted middle positions are also taken into account in the JSON interface for N.I.N.A.  and the path is displayed correctly in the Execute Search window.

Revise:

In planning is displayed here in the calculated order and provides information about the objects that can be reached for the coming night.
In addition to the transit time of the object, the observation time calculated on the basis of the parameters is displayed.
In addition, the planning suggests the exposure times and the number of images per object. Here you can also revise and save the planning, e.g. to display it on a website.

NEOCP Check:

The NEOCP Check function enables the planning to be updated quickly, including the current NEOCP display. It is checked whether there are updates for individual NEOCP objects,
whether these have been deleted or an M.P.E.C. publication took place. If new provisional numbers are assigned, these will be determined and displayed.

Rejected objects:

Display of rejected objects in a new window. After every scheduling will update the display. The reasons for the sorting out are the location in the west and east or too close a moon distance.

 

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Copyright: The author of NEO Planner and all sites of this web is Bernhard Haeusler, Dettelbach, Germany, all rights reserved