# Planets related data

From Planck PLA 2015 Wiki

The planet flux density measurements are described in a paper that is available in Planck-2017-LII^{[1]}.

The raw data can be downloaded here. The interpretation of these data should become apparent from reading the paper. However, the following list aims to provide accurate descriptions of each of the parameters that we provide.

The results are contained in 21 data files, one file for each planet observation made by Planck HFI(Planck) High Frequency Instrument. Each file contains 15 data columns. These data should allow the reader to reconstruct the Planck-HFI(Planck) High Frequency Instrument estimates of planet spectral radiance as well as associated uncertainties, both statistical and systematic.

The columns are:

*Channel: The Planck-HFI(Planck) High Frequency Instrument detector name. *obs tims: The observation time [MJD] corresponding to the time when this detector is centred on the planet. *RA: Astrometric right ascension (ICRF/J2000) ephmeris corresponding to the location of the planet at the time of observation.

Observer location is set to: Planck Space Observatory [500@-489] *DEC: Astrometric declination (ICRF/J2000) ephmeris corresponding to the location of the planet at the time of observation.

Observer location is set to: Planck Space Observatory [500@-489] *pda: Solid angle [arcsec^2] of the planet used in the brightness analysis.

This corresponds to $\Omega _\mathrm{p}$ in the paper (see discussion in Section 2.1). *dpda: Assumed error in planet solid angle [arcsec^2]. *T: Planet thermodynamic temperature [K] (see definition in paper) at the band reference frequency

corresponding to 100, 143, 217, 353, 545, or 857 GHz (see discussion in Section 2.1). *dT1: Statistical uncertainty in the determination of the thermodynamic temperature [K]. *dT2: Systematic uncertainty in the determination of the thermodynamic temperature [K]. *flux: Flux density [Jy] estimate at the reference frequency found by calculating the product of the planet

solid angle and the Planck blackbody formula with the planet thermodynamic temperature and reference frequency as inputs. *dflux1: Statistical uncertainty in flux density [Jy]. *dflux2: Systematic uncertainty in flux density [Jy]. *beam: Scanning beam solid angle [arcmin^2] used for this channel.

This corresponds to $\Omega _\mathrm{b}$ in the paper (see discussion in Section 2.1). *kappa1: Colour correction coefficient appropriate for this detector and planet.

This corresponds to $\kappa _1$ in the paper (see definition in Section 2.1). *kappa2: Colour correction coefficient appropriate for this detector and planet.

This corresponds to $\kappa _2$ in the paper (see definition in Section 2.1).

## References

- ↑
**Planck intermediate results. LII. Planets flux densities**, Planck Collaboration Int. LII A&A, 607, A122, (2017)