Results 31 to 40 of about 2,956 (261)
Some Statistics on Long-Period Comets [PDF]
Symposium - International Astronomical Union, 1979 Distributions of the original reciprocal semimajor axes l/a and the perihelion distances q of eighty “new” comets (Marsden et al, 1978) are discussed from the view point of a hypothesis of the interstellar origin (Hasegawa, 1976).
I. Hasegawa, T. Shimizu
openaire +1 more source
Planetary Trojans – the main source of short period comets? [PDF]
, 2010 One of the key considerations when assessing the potential habitability of telluric worlds will be that of the impact regime experienced by the planet. In this work, we present a short review of our understanding of the impact regime experienced by the ...
Horner, J. +3 more
core +1 more source
The transition between long period comets, short period comets and meteoroid streams [PDF]
International Astronomical Union Colloquium, 1985 It has long been realised that Jovian perturbation is the dominant cause of the transition of long period comets (Period > 200 yr) into short period ones (P < 200 yr). When the differences in the detectability of comets in the two groups are taken into account it is clear that the present day flux of long period comets is sufficient to provide ...
openaire +1 more source
Activity of 50 Long-Period Comets Beyond 5.2 AU [PDF]
, 2016 Remote investigations of the ancient solar system matter has been traditionally carried out through the observations of long-period (LP) comets that are less affected by solar irradiation than the short-period counterparts orbiting much closer to the Sun.
Kelemen, János +25 more
core +1 more source
The Planetary Science Journal, 2023 We measured the chemical composition of comet C/2021 A1 (Leonard) using the long-slit echelle grating spectrograph iSHELL/IRTF on 2021 December 20 and on 2022 January 8 and 9.
Sara Faggi +3 more
doaj +1 more source
What long-period comets tell us about the Oort Cloud
, 2023 Context. The Oort Cloud is located in the farthest outskirts of the Solar System, extending to a heliocentric distance of several tens of thousands of au, and remains the last region of the Solar System where no object has been detected.
Arika Higuchi +5 more
core +1 more source
Anisotropy of long-period comets explained by their formation process [PDF]
The Astronomical Journal, 2020 Long-period comets coming from the Oort cloud are thought to be planetesimals formed in the planetary region on the ecliptic plane. We have investigated the orbital evolution of these bodies due to the Galactic tide. We extended Higuchi et al.
openaire +2 more sources
Small-body encounters using solar sail propulsion
, 2004 Cometary Rendezvous and Flybys have large V requirements, which impose almost unattainable, and sometimes prohibitive, demands on the propellant budget of conventional, chemical propulsion.
Colin R. McInnes +6 more
core +1 more source
The Astrophysical Journal Supplement SeriesWe present the first results from the Cometary Object Study Investigating their Nature and Evolution (COSINE) project, based on a uniformly processed data set of 484 comets observed over the full 15 yr duration of the Wide-field Infrared Survey Explorer (
Yuna G. Kwon +10 more
doaj +1 more source
Advanced Materials, EarlyView.Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora +17 more
wiley +1 more source