Interessant!
Interstellar Visitors: A Physical Characterization of Comet C/2019 Q4 (Borisov) with OSIRIS at the 10.4 m GTC
Julia de Leon, Javier Licandro, Miquel Serra-Ricart, Antonio Cabrera-Lavers, Joan Font Serra, Riccardo Scarpa, Carlos de la Fuente Marcos,.and Raúl de la Fuente Marcos
PDFSpektrenAV-Daten"The final spectrum was normalized to unity at 0.55 µm and is shown in Figure 1. We also plot the template spectrum of the D-type class as defined by DeMeo et al. (2009). As it can be seen, the visible spectrum of C/2019 Q4 resembles those of typical cometary nuclei. We computed the spectral slope in the 0.55–0.90 µm range, S’ = 10 ± 1 %/1000 ˚A, which is roughly in the middle of the range of visible spectral slopes observed for cometary nuclei and asteroids in cometary orbits (see Licandro et al. 2018). This suggests that comets formed in other stars can have a similar composition to those formed in the Solar System and thus be likely produced by similar processes."
Möglichkeiten einer CubeSat-Mission ab 2030:
Sending a Spacecraft to Interstellar Comet C/2019 Q4 (Borisov)Adam Hibberd, Nikolaos Perakis, Andreas M. Hein
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