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pypm install pynomad

How to install PyNOMAD

  1. Download and install ActivePython
  2. Open Command Prompt
  3. Type pypm install pynomad
 Python 2.7Python 3.2Python 3.3
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0.1.0 Available View build log
Lastest release
version 0.1.0 on Jan 9th, 2014

PyNOMAD is used for accessing a locally hosted copy of The Naval Observatory Merged Astrometric Dataset (NOMAD). More information on NOMAD is available at:

System Message: ERROR/3 (<string>, line 8)

Unexpected indentation.
Full copies of the NOMAD catalog are large:
92Gigs uncompressed

System Message: WARNING/2 (<string>, line 13)

Definition list ends without a blank line; unexpected unindent.

30Gigs when compressed with: gzip --best nomad/[0-9][0-9][0-9]/m*

The nomad.py module works with either uncompressed or compressed copies of the catalog.

A typical usage to fetch a region of the catalog is:

#!/usr/bin/env python

from nomad import fetch_nomad_box

ra_range = [281., 281.05] # RA is in degrees dec_range = [-30.6, -30.55] # Dec is in degrees stars = fetch_nomad_box(ra_range, dec_range, epoch=2000.0)

A typical usage to retrieve by NOMAD catalog ID is:

#!/usr/bin/env python

from nomad import fetch_star_by_nomad_id

star = fetch_star_by_nomad_id(['0594-0896798'], epoch=None)

stars = fetch_star_by_nomad_id(['0594-0896794', '0594-0896795',
'0594-0896796', '0594-0896798'], epoch=None)

Note that in all cases the returned object is a pandas.DataFrame.

Some catalog data files used for testing the code are included in:
These are grabbed directly from USNO's website serving the NOMAD database:

System Message: WARNING/2 (<string>, line 47)

Definition list ends without a blank line; unexpected unindent.

These can be used to perform one-time tests cross-checking that the nomad module is working correctly with the local copy of the catalog. These tests (and some other internal consistency checks) can be run by using the nomad_test.py module:

System Message: ERROR/3 (<string>, line 51)

Unexpected indentation.
python nomad_test.py

Originally written 2013-04-05 by Henry Roe (hroe@hroe.me)

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Last updated Jan 9th, 2014

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