What is hd?

Some articles on hd:

HD 150706
... HD 150706 is a 7th magnitude star in the constellation of Ursa Minor ... The HD 150706 system Companion Mass Semimajor axis Orbital period Eccentricity Radius b >2.7±1.1 MJ 6.7±1.4 5894±6 0.38±0.36 — ...
Telewizja Polska - TVP Channels - HD Channels
... TVP1 HD - HD version of TVP1, from June 1, 2012 TVP2 HD - HD version of TVP2, from June 1, 2012 TVP HD - the best productions of TVP in HD ...
2011 IIHF World Championship - IIHF Broadcasting Rights
... Country Broadcaster HD (High Definition) Austria ORF Belarus BTRC Bulgaria Nova Sport Canada TSN TSN HD RDS RDS HD Croatia Sportska Czech Republic ČT ČT HD Denmark TV2 ...
HD 114386
... HD 114386 is a 9th magnitude star located approximately 91 light years away in the constellation of Centaurus ... The HD 114386 system Companion Mass Semimajor axis Orbital period Eccentricity Radius b 0.37 MJ 1.03 445 0.12 — c 1.19 MJ 1.83 1046 0.06 — ...
HD 188015
... HD 188015 is an 8th magnitude star about 172 light-years away in the constellation of Vulpecula ... The HD 188015 system Companion Mass Semimajor axis Orbital period Eccentricity Radius c >0.07 MJ 0.08 8.386 0.23 — b >1.50 ± 0.13 MJ 1.203 ± 0.070 461.2 ...