Skip to content
Find reference stars for astronomical spectroscopy
Python HTML JavaScript
Branch: master
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.


Type Name Latest commit message Commit time
Failed to load latest commit information.


MIT License Made with Python Powered by Astropy

Find reference stars for astronomical spectroscopy :

Based on an idea and the stars database from François Teyssier. Able to find target's coordinates on SIMBAD, observer's place from IAU/MPC observatory code or place name, it also manages timezone and daylight saving. Main processing loop on stars database is parallelized.

Searching for stars nearer than 5° of M27, from 586 (Pic du Midi), september 15th, 23:00 local time :

Target: M  27 (19h59m36s +22d43m16s, Planetary Nebula in Vulpecula), altitude=68.3°, azimuth=204°, airmass=1.076
Observer: lat=42d56m13s, lon=0d08m27s, alt=2843m, tz=Europe/Paris, 2019-09-15 21:00 UTC
..  Star:       Sep:    VMag:   RA:       Dec:          Height:         B-V:    Eb-v:   SpType: Miles:
01  HD 187811   2.0°    4.89    19h51m04s +22d36m36s    67°, Δh=-0.8°   -0.143  0.10    B2,5Ve
02  HD 190993   1.9°    5.06    20h06m53s +23d36m52s    69°, Δh=1.4°    -0.16   0.04    B3V
03  HD 189944   2.1°    5.87    20h01m45s +24d48m02s    70°, Δh=2.1°    -0.133  0.05    B4V
04  HD 185859   4.9°    6.54    19h40m58s +20d28m38s    64°, Δh=-3.7°           0.63    B0.5Iae s0732
05  HD 192685   4.6°    4.76    20h15m16s +25d35m31s    72°, Δh=3.8°    -0.167  0.03    B3V
06  HD 187362   4.4°    5.0     19h48m59s +19d08m31s    64°, Δh=-4.2°   0.1     0.02    A3V
07  HD 192044   4.7°    5.9     20h12m01s +26d28m44s    72°, Δh=4.4°    -0.106  0.02    B7Ve

Required python packages : timezonefinder pytz numpy astropy astroquery joblib. AstroPy version >= 3.1 is required. Caution, numba badly interferes.

File Language Description Python Main script
base.csv CSV Stars database
lib/ Python Stars database
lib/ Python Formater for HTML or text display
lib/ Python Various functions
lib/ Python Observer
lib/ Python Object classification in SIMBAD
lib/ Python Target Python Optional WSGI backend
index.html HTML, CSS Optional web page
jslib.js JavaScript jQuery and JS-Storage for the web page
jscode.js JavaScript JavaScript code for the web page

Work in progress... Discussions on spectro-aras forum.

You can’t perform that action at this time.