Neo Planner V2.4  -  Common restrictions  -  Explanations


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Within the picture, click on the zone that you want to be explained: (not in all browsers available)

These settings are the fifth step in getting Neo Planner up and running.  

Here you define some common restrictions for the planning process.
These settings are primarily used to define the observable area in all directions from the location of the observatory, including self-defined Moon distances.
One should keep an eye on a horizon that is not too far out, even if the observatory would allow it. A full range from R.A. 12 east and west of the meridian makes it difficult for the program
to determine the best observation time for all objects, which is calculated based on the altitude of the nocturnal ephemeris.
So you should generally choose an area that is about 6-10 R.A. hours east or west of the meridian on midnight or more precisely, of the siderial time.

This range can be increased to a greater extent if one carefully checks the results of the calculations for correct chronological order.

Plausibility checks or actions are usually only carried out after leaving the cursor in the input field.

IAU Observatory Code:

The active observatory is displayed

- Moon restrictions

In contrast to deep sky photographers or observers, the moon is not a real obstacle for observers from Near Earth Objects.
Nevertheless, observing our companion too closely will lead to some unusable images. This applies in particular to phases of the moon around 100%.
In this window you have the opportunity to determine the distances between the objects and the moon according to your own experience.
Neo Planner will then sort out those objects whose positions during the night come too close to the moon by the degrees entered.

Experience has shown that when the moon is above the horizon, up to 1 mag lighter objects than usual are selected, depending on the moon phase.
 -> look here how to control the brightness of the objects

 

RA hours east before Siderial time:

Enter the RA hours which objects should be observed east of sidereal time depending on the nature of the horizon.

RA hours west after Siderial time:

Enter the RA hours which objects should be observed west of sidereal time  depending on the nature of the horizon.

Twilight end after sunset:

With this setting you define the time span between sunset and the start of the observation.
Since the start of the observation is based on individual experiences and preferences, enter the time span here yourself.
This can change during the year, depending on the location of the observatory.
For K87 on 50 northern latitude, I start the observation according to the sensitivity of my CCD camera, when nautical dusk is reaching MPSAS ~ 20 mag.
I then adjust the time span in the course of the year according to the seasons.

Twilight start before sunrise:

With this setting you define the time span between the last observation of the night and sunrise.
Since the end of the observation is based on individual experiences and preferences, enter the time span here yourself.
This can change during the year, depending on the location of the observatory.
For K87 on 50 northern latitude, I end the observation according to the sensitivity of my CCD camera, when nautical dusk is reaching MPSAS ~ 20 mag.
I then adjust the time span in the course of the year according to the seasons.

MPSAS -  Magnitude per Square Arc Second -  explanation

Minimum altitude ALT in degree:

The minimum height above the horizon depends primarily on experience as to which objects can reasonably be observed above the horizon with the equipment.
Near Earth Objects in particular require a high quality survey, so a generous degree value should be preferred.

Neo Planner then selects those objects which reach the specified height when crossing the meridian.

 

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