Questions tagged [star-catalogues]

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What does G/IG signify in the galaxy names ESO 012- G 014 and ESO 293-IG 034?

The NASA/IPAC EXTRAGALACTIC DATABASE (NED) lists galaxies from the European Southern Observatory (ESO) catalog as G (ESO 012- G 014) or IG (ESO 293-IG 034). What does G/IG signify?
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1answer
43 views

Are there any good DSO API's for python out there?

I was wondering if there was good DSO database API out there for python so I could fetch things like a distance away from Earth or radius etc. I tried looking however couldn't find the exact thing I ...
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51 views

How is the distance of a star from Earth calculated in the HYG star database

The HYG star database can be found here From the hygdata_v3.csv file, how are the cartesian (x,y,z) coordinates calculated? (Is there a mathematical formula for this?) And in the dso.csv file, there ...
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What are Stokes parameters for galaxy shapes, how do they compare to Stokes parameters in optics?

I remember Stokes parameters as a way to completely define the polarization state of a well-defined beam of light. However several questions here refer to Stokes parameters used in characterizing the ...
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Difference between J2000, FK5 and ICRS coordinate systems? Which one does the Yale Bright Star Catalog use?

I have no background in astronomy. I have been wanting to write code to make star charts for a given location and time, which led to this question. I figured out that I would need to convert the ...
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1answer
66 views

How to query a region on the sky when given only ecliptic coordinates?

I am new at using the Python packages astropy/astroquery and what I want to achieve is to use it to find stars that lay on the TESS continuous view zone (CVZ). I ...
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67 views

Does the Sun have a numerical designation in any star catalogues?

Given the existence of large star catalogues listing millions of astronomical objects with numerical designations (such as Tabby's Star, KIC 8462852) it occurred to me that one of them might contain ...
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1answer
90 views

Which database of celestial objects do stargazing apps use?

Stargazing apps such as Star Walk must have a database with a list of celestial objects, their names and details and each of their celestial coordinates. I am interested to know which database these ...
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1answer
95 views

Why does the number of extrasolar planets vary in different sources?

There are at least three catalogues that are counting up-to-date discovered exoplanets. What criteria do they use to count the number of planets? Every catalogue has a different count value. So at ...
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1answer
42 views

For stars around 13th magnitude, are their entries in various catalogues usually linked, or does one do this manually?

@MikeG's speedy answer to "What star was the asteroid 2014 MU69 predicted to occult on 2018-08-04?" lists three names for one 13th magnitude star, from three catalogues; 2MASS, UCAC4, and Gaia DR2. ...
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1answer
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How can I convert Bayer/Flamsteed designations to Hipparchos numbers?

In a text file I have a table of star data with Bayer/Flamsteed designations. I need to convert these into Hipparchos numbers. How can I automatically do this?
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Is there a complete edition of the Cambridge Catalogue of Radio Sources (esp. 3C) available digitally?

In radio astronomy, many common objects are refered to by their designation from the 3rd Cambridge Catalogue of Radio Sources, e.g. 3C 353. For hobbyist purposes, I would like to create a catalogue ...
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3answers
548 views

Why nobody cares to give the nearest stars better names?

The star occupying 6th place on Wikipedia's list of nearest stars and brown dwarfs can be called either Lalande 21185, BD+36 2147, Gliese 411 or HD 95735. That seems to me like a fine, quadruple ...
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342 views

What is the star whose western traditional name is the longest?

My definition of traditional name is that name that appears in the stellar catalogs made in classical antiquity by Greeks and Romans and which were later translated and compiled by the Arabs to be ...
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1answer
636 views

Where and how to look up the coordinates and magnitude of the star in this occultation prediction?

The motivation for this question comes from this question. A star is named in the occultation prediction shown below, from AsteroidOccultations.com's News & Announcements for 2014 MU69 on ...
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66 views

Duplicate entries in Tycho-2 main and supplement 1

When checking the internal consistency of the Tycho-2 catalogue, I came across 254 entries in the main catalogue file that are also present in supplement 1 (the Hipparcos/Tycho-1 stars not included in ...
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57 views

Stellar catalogues stars in specific sky regions – without downloading the catalogs

I’m interested, to give a scientific realism to a project I’m working on, in finding a picture of all stars belonging to a star catalogue such as Tycho 2 or Hipparcos for some very specific sky ...
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3answers
3k views

Milky Way position on the sky

I'm looking for some sort of boundary data to be able to render the milky way on a star map, as visible from Earth. Something that looks like this: For that, I need something like a collection of RA ...
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Gliese Catalog Designation prefixes

In the Gliese catalog there are a bunch of prefixes, such as GJ, GI, Wo, etc. My question is do the numbers overlap ever? I tried to look it up, but nothing I could find was conclusive to me.
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1answer
4k views

Looking for star database

I am looking for a particular set of information to essentially make a star map for a game. What I need: All stars within 11,462 light years of Earth. Their stellar classification. If they have any ...
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2answers
72 views

Can't find Cassiopias Schedar or Caph in Tycho-2 catalog supplement 1

I'm trying to locate three stars inside Cassiopeia, gam cas, Schedar, and Caph. I have found gamma Cas inside the Tycho-2 catalog supp1.dat file, however when I look for Schedar or Caph I have no luck....
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427 views

Open access table of visible stars with magnitude, coordinates, and possibly color?

I'm looking for a link to a table of visible stars that is open and available to everyone. It should have magnitude, RA, dec, and possibly some indication of color. This will be used to produce ...