The Avedisova catalog contains many exotic and little-known objects. Here's a guide to some of them.
28P radio source
The 28P radio sources were detected by the Dominion Radio Astrophysical Observatory in British Columbia and published in a paper by Higgs and van der Werf in 1991.
ADP radio source
The ADP catalog of galactic plane radio sources at 4.875 GHz detected by the Effelsberg radio telescope in Germany was published by Altenhoff, Downes, Pauls and Schraml in 1979.
BFS HII region
The BFS catalog of ionised hydrogen (HII) regions was published by Blitz, Fich and Stark in 1982.
BHR Bok globule
The BHR catalog of small dense molecular clouds (Bok globules) was published by Bourke, Hyland and Robinson in 1995.
This region contains a Be star, a B-class star with prominent emission lines.
The Bran catalog of small nebulae in the direction of the outer galaxy was published by Brand, Blitz and Wouterloot in 1986.
CB Bok globule
The CB catalog of small dense molecular clouds (Bok globules) was published by Clemens and Barvainis in 1988.
Caswell/Haynes HII region
The Caswell/Haynes HII regions are clouds of ionised hydrogen detected by the Parkes radio telescope in Australia and published by Caswell and Haynes in 1987.
CalTech B list radio source
Radio sources detected at 960 MHz by the California Institute of Technology Radio Observatory and published in a catalog in two papers by Wilson and Bolton in 1960 and 1963.
DG reflection nebula
The DG catalog of reflection nebulae was published by Dorschner and Gürtler in 1963.
DGSW galactic centre radio source
The DGSW catalog of compact radio sources in the galactic centre detected at 5 GHz by the Westerbork Synthesis Radio Telescope in the Netherlands was published by Downes, Goss, Schwarz and Wouterloot in 1979.
DR microwave source
The DR microwave sources in the Cygnus X region were detected by Downes and Rinehart and published in a 1966 catalog.
DWB HII region
The DWB catalog of HII regions associated with Cygnus X was compiled by Dickel, Wendker and Bieritz and published in 1969.
FIR galactic centre far infrared source
The FIR galactic centre survey of far infrared sources was carried out by a balloon-borne telescope in 1975 and published by Odenwald and Fazio in 1984.
FIRSSE infrared source
The Far Infrared Sky Survey Experiment survey of far infrared sources was carried out by a rocket-borne telescope and described in a report published by Price, Murdock and Shivanandan in 1983.
GGD Herbig-Haro object
The GGD catalog of Herbig-Haro objects was published by Gyulbudaghian, Glushkov and Denisyuk in 1978.
The GM nebulae were described by the Armenian astronomers Giulbudagian and Magakian in three papers published in 1977.
GPSR5 radio source
The GPSR5 survey of the galactic plane at 5GHz by the Very Large Array radio telescope in New Mexico was published by Becker, White, Helfand and Zoonematkermani in 1994.
GWC galactic centre radio source
The GWC catalog of radio sources in Sgr E in the galactic centre was compiled by Gray, Whiteoak, Cram and Goss and published in 1993.
SIMBAD lists this object as a galaxy.
Gum HII region
Colin Gum published his pioneering catalog of ionised hydrogen (HII) regions in 1955.
HFE infrared source
The far infrared (100μ) HFE survey of the galactic plane was carried out by three balloon flights in 1970 and 1971 and published by Hoffmann, Fredrick and Emery.
IRAS infrared source
The Infrared Astronomical Satellite (IRAS) was a joint project of the US, UK and the Netherlands. Operating in 1983, the satellite successfully observed more than 96% of the sky and detected about 350,000 infrared sources, most of which had never been seen before.
KR radio source
The KR catalog of galactic plane radio sources at 21 cm was compiled by Kallas and Reich using the Effelsberg radio telescope in Germany and published in 1980.
Lockman compact HII region
The Lockman catalog of compact ionised hydrogen (HII) regions detected by the National Radio Astronomy Observatory 140 ft radio telescope at Green Bank, West Virginia was published by Felix Lockman in 1989.
Lynds dark nebula
The Lynds dark nebulae are dusty regions that often harbour young stars. Beverly Lynds published her catalog in 1962.
A maser is an intense source of microwave radiation. Masers are usually generated by dust and molecular gas heated by young stars. The three most common types are generated by water, hydroxyl and methanol molecules, although other sources are known as well.
Mount Wilson emission line star
The Mount Wilson catalog of more than 1000 stars with emission lines in their spectra was compiled by Merrill and Burwell and published in three papers in 1933, 1943 and 1949.
NRAO radio source
The NRAO catalog of radio sources detected using the National Radio Astronomy Observatory 300 foot radio telescope at 750 and 1400 MHz in Green Bank, West Virginia was published by Pauliny-Toth, Wade, and Heeschen in 1966.
OH/IR variable star
This region contains a Mira-type massive variable star surrounded by an OH/IR gas envelope.
The often spectacular death throes of a main sequence star.
Post Asymptotic Giant Branch Star
The region contains a red giant or supergiant star that has evolved beyond the Asymptotic Giant Branch phase and is now becoming a preplanetary nebula.
RAFGL infrared source
The RAFGL catalog of infrared sources originated from two airborne missions flown by the US Air Force in 1982.
RCW HII region
The RCW catalog of ionised hydrogen (HII) regions was published by Rodgers, Campbell and Whiteoak under the direction of Bart Bok in 1960.
SGR galactic centre radio source
Early radio studies of the centre of the Milky Way identified 5 major radio sources - SGR A, B, C, D and E. Many of these have now been subdivided into several smaller sources.
Sandqvist dust cloud
Sandqvist released his catalog of dust clouds visible from the southern hemisphere in two papers published in 1976 and 1977.
Seiradakis galactic centre radio source
The Seiradakis galactic centre radio sources were detected by the Effelsberg radio telescope in Germany and published by Seiradakis and colleagues in 1989.
Sharpless HII region
The Sharpless catalog of ionised hydrogen (HII) regions was published in 1959.
SYCSW molecular clouds
The SYCSW catalog of 1682 giant molecular clouds in the first galactic quadrant using CO data from the Massachusetts-Stony Brook Galactic Survey was published by Scoville, Yun, Clemns, Sanders and Waller in 1987.
TAS galactic centre radio source
The TAS survey of galactic centre radio sources was carried out at 22 GHz by the Itapetinga radio telescope in Brazil and published by Tateyama, Abraham and Strauss in 1986.
VDB reflection nebula
The VDB catalog of reflection nebulae was published by van den Bergh in 1966.
Wendker radio source
The Wendker radio sources were detected at a frequency of 2695 MHz by the National Radio Astronomy Observatory 140 foot radio telescope at Green Bank, West Virginia in the Cygnus X region and published by Wendker in 1970.
Westerhout radio source
The Westerhout radio sources were detected at a frequency of about 1390 MHz during a survey carried out by Gart Westerhout using the Dwingeloo radio observatory in the Netherlands in September 1956 and published in a famous paper in 1958.
The Wouterloot/Brand objects are IRAS infrared sources in close proximity to one or more molecular clouds in the galactic plane between 85° to 280°. Wouterloot and Brand used kinematic data for the molecular gas to derive distance estimates for many of these objects in a paper published in 1989 as part of a major effort to map the outer galaxy.
Young stellar object
This region contains a young stellar object (YSO), a star in an early stage of development.