Planetary

Ask the virtual scientist

	C/2007 W1
	Geometry: C/2007 W1 measured via Observatory from 0.3484 AU for date (2008/07/09 15:10 UT)	Change Object
	Atmosphere and surface: Production rate: 8.1900e+27 molecules/sec; Expansion velocity: 846.67 m/s; Atmospheric temperature: 81.6734 K; Gases: CH4,C2H6,CH3OH; Surface temperature: 200.0000 K; Albedo: 0.0400; Emissivity: 0.9600;	Change Composition
	Instrument parameters: Measurement range 2961.308850-3004.964550 cm with a resolution of 25000 RP. Molecular signatures included; Continuum/background fluxes enabled;	Change Instrument
	File units

Telescope / instrument

NIRSPEC is the Near Infrared Spectrometer at the Keck observatory on Manuakea (4200m), Hawaii. It is a cryogenic cross-dispersed echelle spectrograph which features spectroscopy over the 0.96-5.5 micron range at resolutions up to 40,000 (although currently optimized for RP lower than 25,000). The instrument samples this broad spectral range by employing an array of cross-dispersers and filter configurations.

Spectral range: Resolution:
Include atmospheric signatures Include continuum fluxes Integrate stellar templates
Terrestrial transmittance Apply Multiply Altitude/Water:
Spectrum intensity unit: Log plot
Telescope	Beam [FWHM]: Exozodi level: Diameter [m, effective]: Telescopes:
Noise	Time / exposure [s]: Number of exposures: Number of pixels: NETD[mK]: Speed[Hz]: η_Total, ε_opt, T_opt[K]

Cancel