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Abbreviations, etc.

MishMich

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MishMich

MishMich

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Acronyms and Abbreviations associated with amateur astronomy and associated equipment (v.1.1)

Common terms:

RDF - Red Dot Finder

Bins - Binoculars

Obsy - Observatory

APOD = Astronomy Picture of the Day

POW - Picture of the Week

Astronomy-specific:

AP - AstroPhysics (can be Astrophotography)

DSO - Deep Sky Object

AGN - Active Galactic Nuclei

BH - Black Hole

NS - Neutron Star

WD - White Dwarf

F - Following

Optics:

FWHM - Full Width Half Maximum

FR - Focal Ratio

FOV - Field of View

CA - Chromatic Aberration

SA - Spherical Aberration

FP - Fabry–Pérot interferometer

IR - Infra Red

UV - Ultra Violet

Mounts, Guiding, Location:

GEM - German Equatorial Mount

Alt-Az - Altitude-Azimuth (mount)

OAG - Off Axis Guider

RA - Right Ascension

DEC - Declination

ALT - Altitude

AZ - Azimuth

LAT - Lattitude

LONG - Longitude

CM - Central Meridian

Ls/Lsun - Planet-Sun angle as measured from the northern hemisphere spring equinox.

Telescopes (generally):

EP - Eyepieces

OTA - Optical Tube Assembly

Newt - Newtonian reflector telescope

Frac - Refractor telescope

Dob - Dobsonian mounted reflector telescope

Cat - Catadioptric optical system

Refractor specific:

ED - Extra-low Dispersion (glass)

Apo - Apochromat(ic)

Achro - Achromat(ic)

Doublet - (2 lens assembly)

Triplet - (3 lens assembly)

Catadioptric optical systems:

SCT - Schmidt-Cassegrain telescope

Mak - Maksutov-Cassegrain telescope

RCT - Ritchey-Chrétien telescope

SNT - Schmidt-Newtonian telescope

KCT - Klevtsov-Cassegrain telescope

Filters, Flatteners, Reducers:

FF - Field Flattener

FR - Focal Reducer

CaK - Calcium K Line

H-A/Ha - Hydrogen Alpha

HB - Hydrogen Beta

OIII - Oxygen Three

SII - Sulphur Two

LPR - Light Pollution Reduction

CLS - blocks light from street lamps, passes other visible light and H-alpha emissions.

SEF - Solid Etalon Filter

BF - Blocking filter

ITF - Induced transmission filter

ERF - Energy rejection filter

IR-cut - IR blocking filter

IR-pass - IR pass filter

Astrophotography, imaging, video related:

DSLR - Digital Single Lens Reflex

CCD - Charge-coupled Device

LCD - Liquid Crystal Display

LED - Light-emitting Diode

CMOS - Complementary metal–oxide–semiconductor

CCTV - Closed Circuit Television

HDD - Hard Disk Drive

USB - Universal Serial Bus

RS232 - Serial Port/cable

HD - High Definition

RGB - Image is built from separate red, green and blue filtered images

R(G)B - You might see this with a Mars image and it means that only red and green were truly imaged during the session, the green channel was synthesised artificially.

LRGB - An RGB image augmented with a luminence channel. Actually, I have no idea what this means in reality as taking a true unfiltered luminence channel on a planet is pretty pointless IMO (In My Opinion).

RRGB - An RGB image that uses the red channel for luminance (now this makes much more sense!)

IR-RGB - An RGB image that uses an IR (Infra Red) filtered image for luminance.

CFHT Pallete - R=Ha G=O3, B=S2

NBI - NarrowBand Imaging

eline - emission line

KAF - Kodak Full Frame technology

KAI - Kodak Interline technology

SBIG - Santa Barbara Instrument Group

FLI - Finger lakes Instrumentation

SX - Starlight Xpress

CFA - Colour Filter Array

CMY - cyan magenta yellow

ADC - analogue to digital converter

CDS - Correlated Double Sampling

MP - megapixel

um - size in microns, or micrometres

nm - nanometres

SNR - signal to noise ratio

DSS - DeepSky Stacker

QE - Quantum Efficiency

CTE - charge transfer efficiency

CCE - charge collection efficiency

DR - dynamic range

HDR - High Dynamic Range

PS - Photoshop (PSE(n) = PS Elements, CS2/3/4 = PS CS2/3/4)

FIT - Frame Interline Transfer

OTF - optical transfer function

CTF - contrast transfer function

PSF - point spread function

HFD - half flux diameter (used in focussing)

People, positions, organisations, places:

PI - Principle Investigator

SPM - Sir Patrick Moore

FLO - First Light Optics

SGL - StarGazersLounge

TS - TeleskopService

CFHT - Canada-France Hawaii Telescope

SW - skywatcher

OO - orion optics (the guys based in crewe)

TMB - Thomas M. Back (& lens assemblies of his design)

WO - WIlliam Optics

Tak - Takahashi

TV - Televue

Catalogs:

M (nnn) - Messier Catalogue (by Charles Messier)

NGC (nnn) - New General Catalogue (by J.L.E. Dreyer), 7,840 objects. Includes IC I & IC II - a further 5,326 objects

C (nnn) Caldwell Catalogue (by Sir Patrick Moore)

IC - Index Catalogue, an addendum to the NGC

HD - Henry Draper Star Catalogue

SH2 (nnn) Sharpless2 Nebula Catalogue

Misc:

'Central Meridian' is the line of longitude running down the exact centre of the planet from your location.

'Ls/Lsun' denotes the planet-sun angle as measured from the northern hemisphere spring equinox. Ls=0 means the planet is at spring, Ls=90 means the planet is experiencing summer in the northern hemisphere, LS=180 for the northern hemisphere autumn equinox and LS=270 for northern hemisphere winter.

'Following' refers to features that are closer to the limb where new features are rotating into view, than P Preceding features which are closer to the limb where features are about to rotate out of view. Basically, features on the following limb are coming towards you while those on the preceding limb are moving away from you.

Hubble pallette - R=S2 G=Ha B=O3

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MishMich

MishMich

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Another version - thanks guys - if I miss anything, let me know. If you think something could be located in a different section, let me know. So, if astrophotography can be branched into astrometry - you'll need to say what needs to go where, because I wouldn' know.

M.

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Doc

Doc

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Say a telescope on a EQ mount has tracked a target almost to the meridian, at or near this point, a German Equatorial mount requires the user to initiate a "meridian flip" to swap the position of the telescope and the counterweight so the mount can point at the same target and continue to track it westward.

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LukeSkywatcher

LukeSkywatcher

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Say a telescope on a EQ mount has tracked a target almost to the meridian, at or near this point, a German Equatorial mount requires the user to initiate a "meridian flip" to swap the position of the telescope and the counterweight so the mount can point at the same target and continue to track it westward.

Gotcha

My 90mm EQ scope has a GEM and i knew nothing of this. I Always wondered why my GEM mount could never let me observe that high up.

Nothing in the damn manual about this.

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Doc

Doc

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I'm not an imager so do not know the practical side of these mounts but I read alot, and have been around a while so have picked alot of infomation up along the way. I'm surprised it's not mentioned in the manual though.

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LukeSkywatcher

LukeSkywatcher

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I'm not an imager so do not know the practical side of these mounts but I read alot, and have been around a while so have picked alot of infomation up along the way. I'm surprised it's not mentioned in the manual though.

My Celestron destructions only told me how to mount the scope. NOTHING about flipping anything to track any object close to or past zenith.

THANKFULLY my SW130P Heritage Dob has no such issues.

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LukeSkywatcher

LukeSkywatcher

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If my scope came with destructions I would be very worried! :)

"Destructions" (rather then instructions) is a very English/Irish way of referring to instructional manuals for any given object.

It is a local thing. Ive been trying to learn Portugese for 3 yrs now.I know a bit more then the basics.

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pvaz

pvaz

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"Destructions" (rather then instructions) is a very English/Irish way of referring to instructional manuals for any given object.

It is a local thing. Ive been trying to learn Portugese for 3 yrs now.I know a bit more then the basics.

LOL I really didn't have a clue! Most of my English came naturally cause I used to live in a military base, with both Portuguese and US soldiers and had a few American friends. Only recently I came more in contact with British English mainly through this forum and some comedy shows (been a British humor fan since I can remember, "Life of Brian" is one of my favorite movies).

Nice going on the Portuguese! I bet you've been asking yourself "Why the hell do this people have to use a different word for every single personal pronoun, when they conjugate a verb?!?!"

Blame the romans... :)

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LukeSkywatcher

LukeSkywatcher

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Nice going on the Portuguese! I bet you've been asking yourself "Why the hell do this people have to use a different word for every single personal pronoun, when they conjugate a verb?!?!"

Blame the romans... :)

Portugal is like my second home ( i love the country,culture,food ). I am really trying to be fluent in the language.

Not an easy task, but i am pretty fluent in Spanish,.Italian, French, German,Gaelic and English.

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MishMich

MishMich

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Acronyms and Abbreviations associated with amateur astronomy and associated equipment used on SGL (v.1.2)

Common terms:

RDF - Red Dot Finder

Bins - Binoculars

Obsy - Observatory

APOD = Astronomy Picture of the Day

POW - Picture of the Week

Astronomy-specific:

AP - AstroPhysics (can be Astrophotography)

DSO - Deep Sky Object

AGN - Active Galactic Nuclei

BH - Black Hole

NS - Neutron Star

WD - White Dwarf

F - Following

Optics:

FWHM - Full Width Half Maximum

FR - Focal Ratio

FOV - Field of View

CA - Chromatic Aberration

SA - Spherical Aberration

FP - Fabry–Pérot interferometer

IR - Infra Red

UV - Ultra Violet

Mounts, Guiding, Location:

EQ - Equatorial (mount)

GEM - German Equatorial Mount

Alt-Az - Altitude-Azimuth (mount)

MF - Meridian Flip

OAG - Off Axis Guider

RA - Right Ascension

DEC - Declination

ALT - Altitude

AZ - Azimuth

LAT - Lattitude

LONG - Longitude

CM - Central Meridian

Ls/Lsun - Planet-Sun angle as measured from the northern hemisphere spring equinox.

Telescopes (generally):

EP - Eyepieces

OTA - Optical Tube Assembly

Newt - Newtonian reflector telescope

Frac - Refractor telescope

Dob - Dobsonian mounted reflector telescope

Cat - Catadioptric optical system

PST - Personal Solar Telescope

Refractor specific:

ED - Extra-low Dispersion (glass)

Apo - Apochromat(ic)

Achro - Achromat(ic)

Doublet - (2 lens assembly)

Triplet - (3 lens assembly)

Catadioptric optical systems:

SCT - Schmidt-Cassegrain telescope

Mak - Maksutov-Cassegrain telescope

RCT - Ritchey-Chrétien telescope

SNT - Schmidt-Newtonian telescope

KCT - Klevtsov-Cassegrain telescope

Filters, Flatteners, Reducers:

FF - Field Flattener

FR - Focal Reducer

CaK - Calcium K Line

H-A/Ha - Hydrogen Alpha

HB - Hydrogen Beta

OIII - Oxygen Three

SII - Sulphur Two

LPR - Light Pollution Reduction

CLS - blocks light from street lamps, passes other visible light and H-alpha emissions.

SEF - Solid Etalon Filter

BF - Blocking filter

ITF - Induced transmission filter

ERF - Energy rejection filter

IR-cut - IR blocking filter

IR-pass - IR pass filter

Astrophotography, imaging, video related:

DSLR - Digital Single Lens Reflex

CCD - Charge-coupled Device

LCD - Liquid Crystal Display

LED - Light-emitting Diode

CMOS - Complementary metal–oxide–semiconductor

CCTV - Closed Circuit Television

HDD - Hard Disk Drive

USB - Universal Serial Bus

RS232 - Serial Port/cable

HD - High Definition

RGB - Image is built from separate red, green and blue filtered images

R(G)B - You might see this with a Mars image and it means that only red and green were truly imaged during the session, the green channel was synthesised artificially.

LRGB - An RGB image augmented with a luminence channel. Actually, I have no idea what this means in reality as taking a true unfiltered luminence channel on a planet is pretty pointless IMO (In My Opinion).

RRGB - An RGB image that uses the red channel for luminance (now this makes much more sense!)

IR-RGB - An RGB image that uses an IR (Infra Red) filtered image for luminance.

CFHT Pallete - R=Ha G=O3, B=S2

NBI - NarrowBand Imaging

eline - emission line

KAF - Kodak Full Frame technology

KAI - Kodak Interline technology

SBIG - Santa Barbara Instrument Group

FLI - Finger lakes Instrumentation

SX - Starlight Xpress

CFA - Colour Filter Array

CMY - cyan magenta yellow

ADC - analogue to digital converter

CDS - Correlated Double Sampling

MP - megapixel

um - size in microns, or micrometres

nm - nanometres

SNR - signal to noise ratio

DSS - DeepSky Stacker

QE - Quantum Efficiency

CTE - charge transfer efficiency

CCE - charge collection efficiency

DR - dynamic range

HDR - High Dynamic Range

PS - Photoshop (PSE(n) = PS Elements, CS2/3/4 = PS CS2/3/4)

FIT - Frame Interline Transfer

OTF - optical transfer function

CTF - contrast transfer function

PSF - point spread function

HFD - half flux diameter (used in focussing)

OSC - One Shot Colour. (CCD camera that takes colour images without use of filters)

People, positions, organisations, places:

PI - Principle Investigator

SPM - Sir Patrick Moore

FLO - First Light Optics

SGL - StarGazersLounge

TS - TeleskopService

CFHT - Canada-France Hawaii Telescope

SW - skywatcher

OO - orion optics (the guys based in crewe)

TMB - Thomas M. Back (& lens assemblies of his design)

WO - WIlliam Optics

Tak - Takahashi

TV - Televue

Catalogs:

M (nnn) - Messier Catalogue (by Charles Messier)

NGC (nnn) - New General Catalogue (by J.L.E. Dreyer), 7,840 objects. Includes IC I & IC II - a further 5,326 objects

C (nnn) Caldwell Catalogue (by Sir Patrick Moore)

IC - Index Catalogue, an addendum to the NGC

HD - Henry Draper Star Catalogue

SH2 (nnn) Sharpless2 Nebula Catalogue

Misc:

'Central Meridian' is the line of longitude running down the exact centre of the planet from your location.

'Ls/Lsun' denotes the planet-sun angle as measured from the northern hemisphere spring equinox. Ls=0 means the planet is at spring, Ls=90 means the planet is experiencing summer in the northern hemisphere, LS=180 for the northern hemisphere autumn equinox and LS=270 for northern hemisphere winter.

'Following' refers to features that are closer to the limb where new features are rotating into view, than P Preceding features which are closer to the limb where features are about to rotate out of view. Basically, features on the following limb are coming towards you while those on the preceding limb are moving away from you.

Hubble pallette - R=S2 G=Ha B=O3

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