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DOCdb

Deep Sky Observer's Companion – the online database

 

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Full database:

Entire DOCdb database of 18,648 objects.

 browse:

 position:

Seven Sisters of the Pole (1 of 18,648)

 next:

oc gc pln bn dn gx gxcl ast aka lost

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 1  Exact identifier

NGC

Messier

IC

Bennett

Non-NGC/IC

Caldwell

How to access the information in the database:

If you're looking for info on a specific object, and you know its exact identifier (for example, 'PN G294.1+43.6' or 'Cl Stephenson 2'), type that in one of the boxes on the right (in section  1  ) and hit "goto". For objects in the Messier, Bennett and Caldwell lists, a handy drop-down selection is provided.

Alternatively (section  2  below), you can specify up to two phrases to find partial matches (for example, 'PN H' and 'IC', lists all Hubble planetaries also in the IC).

To find all objects based on their RA and Dec, either use  3  (to search around a point) or  4  (to find everything within a block of sky).

To find objects by constellation, see section  5 . To list objects appearing on the pages of certain star atlases, try  6 .

If you have no idea what you're looking for, section  7  will allow you to explore the sky visible during your current observing session. Note that you have to be logged in to use this feature (computers aren't that good yet).

Finally, you could try section  8  and search for up to two phrases in the text descriptions (for example, 'amazing', or 'naked' and 'broad'). This could take a long time, so be patient.

 2  Search by identifier

Find objects by various designations.

First search phrase in object designation

    and

Second search phrase in object designation

(notation conventions)

Type of object to include:

open cluster, star cluster, star cloud, association of stars
globular cluster
planetary nebula
bright nebula, reflection nebula, supernova remnant
dark nebula
galaxy
galaxy cluster, galaxy pair, group of galaxies
asterism, star (single), star (multiple), trapezium, nova
plate defect, unverified, lost, not exist

 3  Search around a co-ordinate

Find all objects within a certain radius from a point in the sky.

Search radius

 (20° maximum)

[format: degrees]

R.A. of centre point

[format: hours minutes seconds]

Declination of centre point

[format: sign degrees minutes seconds]

Type of object to include:

open cluster, star cluster, star cloud, association of stars
globular cluster
planetary nebula
bright nebula, reflection nebula, supernova remnant
dark nebula
galaxy
galaxy cluster, galaxy pair, group of galaxies
asterism, star (single), star (multiple), trapezium, nova
plate defect, unverified, lost, not exist

 4  Search by co-ordinate block

Find all objects within a block of sky, bound by co-ordinates:

R.A. (west to east)

to

[format: hours minutes seconds]

Declination (south to north)

to

[format: sign degrees minutes seconds]

Type of object to include:

open cluster, star cluster, star cloud, association of stars
globular cluster
planetary nebula
bright nebula, reflection nebula, supernova remnant
dark nebula
galaxy
galaxy cluster, galaxy pair, group of galaxies
asterism, star (single), star (multiple), trapezium, nova
plate defect, unverified, lost, not exist

 5  Search by constellation

Find all objects within the selected constellations:

Andromeda
Antlia
Apus
Aquarius
Aquila
Ara
Aries
Auriga
Bo÷tes
Caelum
Camelopardalis
Cancer
Canes Venatici
Canis Major
Canis Minor
Capricornus
Carina
Cassiopeia
Centaurus
Cepheus
Cetus
Chamaeleon
Circinus
Columba
Coma Berenices
Corona Australis
Corona Borealis
Corvus
Crater
Crux

Cygnus
Delphinus
Dorado
Draco
Equuleus
Eridanus
Fornax
Gemini
Grus
Hercules
Horologium
Hydra
Hydrus
Indus
Lacerta
Leo Minor
Leo
Lepus
Libra
Lupus
Lynx
Lyra
Mensa
Microscopium
Monoceros
Musca
Norma
Octans
Ophiuchus
Orion

Pavo
Pegasus
Perseus
Phoenix
Pictor
Pisces
Piscis Austrinus
Puppis
Pyxis
Reticulum
Sagitta
Sagittarius
Scorpius
Sculptor
Scutum
Serpens
Sextans
Taurus
Telescopium
Triangulum Australe
Triangulum
Tucana
Ursa Major
Ursa Minor
Vela
Virgo
Volans
Vulpecula

 6  Look up objects by star chart number

Millenium Star Atlas (MSA)

 (1-1548)

Uranometria 2000.0

 (1-473)

 7  What's up?

Explore the sky by finding everything above a certain altitude

Choose an altitude cut-off:

 8  Full text search

Search (slowly!) through the text descriptions and comments.

First search phrase

    and

Second search phrase

Favourite lists

Lacaille's catalogue

The Messier objects

Dunlop's catalogue

The Bennett objects

The Caldwell list

Named DSOs

Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.