Astrophotometer
Definition
A high-precision astronomical instrument (equipped with photoelectric sensors or calibrated CCD/CMOS cells) used in astrophotometry to quantitatively measure the luminous flux, intensity, and brightness of radiation emitted by celestial bodies. This device allows comparing the magnitude of a target star with a standard artificial light source or reference stars, forming the basis for calculating light curves of variable stars and detecting extrasolar planets.
Bilingual Equivalents
- Astrophotometer
- Astronomical photometer
Grammatical & Source Details
| Inflection Type | Neuter noun, regular plural structural forms applied in technical instruments classification. |
| Formation | Derived through modern scientific compounding of the spatial prefixoid 'astro-' and the technical noun 'photometer'. |
| Spelling / Pronunciation | [ˌæs.troʊ.fə.ˈtɒm.ə.tər] |
| Source | Glossary of Physics and Advanced Astronomical Instrumentation Standards |
Contextual Usage Examples
RO: Astronomii au montat un astrofotometru fotoelectric la focarul telescopului principal pentru a monitoriza eclipsa stelei binare.
EN: Astronomers mounted a photoelectric astrophotometer at the focus of the main telescope to monitor the binary star's eclipse.
RO: Noul astrofotometru digital poate înregistra variații de luminozitate de ordinul miimilor de magnitudine.
EN: The new digital astrophotometer can record brightness variations on the order of thousandths of a magnitude.
RO: Calibrarea unui astrofotometru se realizează prin observarea unor stele etalon cu flux luminos constant bine cunoscut.
EN: The calibration of an astrophotometer is performed by observing standard stars with a well-known constant luminous flux.
Idioms & Phrases
Astrofotometru cu filtre / Filter astrophotometer
RO: Dispozitiv prevăzut cu o roată de filtre optice standardizate (cum ar fi sistemul Johnson-Cousins) pentru analizarea luminii pe lungimi de undă specifice.
EN: A device equipped with a wheel of standardized optical filters (such as the Johnson-Cousins system) for analyzing light at specific wavelengths.
Astrofotometru fotoelectric / Photoelectric astrophotometer
RO: Aparat clasic de înaltă precizie bazat pe tuburi fotomultiplicatoare care transformă fotonii stelari în semnale electrice măsurabile.
EN: A classic high-precision device based on photomultiplier tubes that convert stellar photons into measurable electrical signals.
Eroare de astrofotometru / A data logging deviation caused by the sensor's dark current or variations in the Earth's atmospheric transparency.
RO: Abatere în înregistrarea datelor cauzată de curentul de întuneric al senzorului sau de variația transparenței atmosferei terestre.
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