Results 81 to 90 of about 35,742 (267)

Photometry and Models of Seven Main-Belt Asteroids

Universe
The China Near-Earth Object Survey Telescope (CNEOST) conducted four photometric surveys from 2015 to 2018 using image processing and aperture photometry techniques to obtain extensive light curve data on asteroids. The second-order Fourier series method
Jun Tian, Haibin Zhao, Bin Li, Yongxiong Zhang, Jian Chen, Leonid Elenin, Xiaoping Lu   +6 more
doaj   +1 more source

ASTEROIDS SEARCH RESULTS IN LARGE PHOTOGRAPHIC SKY SURVEYS

Odessa Astronomical Publications, 2017
Photographic observations of XX century contained numerous and varied information about all objects  and  events  of  the  Universe  fixed  on  plates.  The original and interesting observations of small bodies of the Solar  system  in  previous  years ...
S. V. Shatokhina, L. V. Kazantseva, O. M. Yizhakevych, I. Eglitis, V. M. Andruk   +4 more
doaj   +1 more source

Asteroid Distributions in the Ecliptic [PDF]

, 2009
We present analysis of the asteroid surface density distribution of main belt asteroids (mean perihelion $\Delta \simeq 2.404$ AU) in five ecliptic latitude fields, $-17 \gtsimeq \beta(\degr) \ltsimeq +15$, derived from deep \textit{Large Binocular Telescope} (LBT) $V-$band (85% completeness limit $V = 21.3$ mag) and \textit{Spitzer Space Telescope ...
arxiv   +1 more source

From Bednets to Rocket Ships: Efficiency in the Long‐Term and Neglect for the Present

Journal of Applied Philosophy, EarlyView.
ABSTRACT In this article I develop an objection to Longtermism – the view that concern for the long‐term future is a moral imperative – that is often gestured at, but not fleshed out. I call this the Far‐Future Priority Objection: Longtermism may entail significant resource reallocation and systemic neglect of the worst off today.
Elizabeth C. Hupfer
wiley   +1 more source

An overview of the petrography and petrology of particles from aggregate sample from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract The OSIRIS‐REx mission returned a sample of regolith from the carbonaceous asteroid Bennu in September 2023. We present preliminary in situ investigations of the petrology and petrography of selected particles ranging in size from 0.5 to 3 mm.
Harold C. Connolly Jr, Dante S. Lauretta, Timothy J. McCoy, Sara S. Russell, Pierre Haenecour, Anjani Polit, Jessica J. Barnes, Thomas J. Zega, Hisayoshi Yurimoto, Noriyuki Kawasaki, Kevin Righter, Guy Libourel, Marc Portail, Vincent Guigoz, Ashley J. King, Lindsay P. Keller, Kathy Thomas‐Keprta, Loan Le, Valarie Tu, Scott A. Eckley, Catherine M. Corrigan, Timothy Gooding, Timothy Rose, Rob Wardell, Soumya Ray, Victoria E. Hamilton, Nicole G. Lunning, Christopher J. Snead, Francis M. McCubbin, Michelle S. Thompson, Rhian H. Jones, Kenneth Domanik, Dolores Hill, Lucas Smith, Iunn J. Ong, Tobias Salge, Natasha Almeida, Catherine Harrison, Helena Bates, Paul Schofield, Ian A. Franchi, Brian H. May, Claudia Manzoni, Andrew J. Ryan, Ronald‐Louis Ballouz, Robert J. Macke, Jason P. Dworkin, Charles C. Lorentson, Kimberly Tait, Erica R. Jawin, Hannah H. Kaplan, Daniella N. DellaGuistina, Kevin J. Walsh, Michael C. Moreau, Heather L. Enos, C. W. V. Wolner, Heather L. Roper, Shogo Tachibana   +57 more
wiley   +1 more source

Detection of Hydration on Nominally Anhydrous S-complex Main Belt Asteroids

The Planetary Science Journal
We present the results of a survey of nominally anhydrous main belt S-complex asteroids. Thirty-three observations of 29 unique asteroids were obtained using the IRTF+SpeX instrument in prism and LXD short modes.
Maggie McAdam, Cristina Thomas, Lauren McGraw, Andrew Rivkin, Joshua Emery   +4 more
doaj   +1 more source

SEARCH SMALL BODIES IMAGES IN COLLECTIONS DIGITIZED PHOTOGRAPHIC OBSERVATIONS OF PREVIOUS YEARS

Odessa Astronomical Publications, 2016
Photographic observations of XX century is an important source of information on small bodies of the Solar system. The observations of chronologically earlier oppositions, photometric evaluation of brightness for long periods of time allow refining the ...
S. Shatokhina, L. Kazantseva, A. Kazantsev, V. Andruk, V. Golovnia   +4 more
doaj   +1 more source

Eccentricity distribution in the main asteroid belt [PDF]

, 2016
The observationally complete sample of the main belt asteroids now spans more than two orders of magnitude in size and numbers more than 64,000 (excluding collisional family members). We undertook an analysis of asteroids' eccentricities and their interpretation with simple physical models.
arxiv   +1 more source

AGONISM IN ASTEROIDS

The Biological Bulletin, 1975
1. Intraspecific agonistic behavior, called bouts, which involves ray interactions between individual sea stars, is reported in species from all three living orders of asteroids and described for Patiria miniata and Pycnopodia helianthoides. This behavior indicates a certain sensitivity to conspecific contact on the aboral surface, in which each ...
openaire   +3 more sources

An experimental study of trace element partitioning into troilite during iron meteorite crystallization

Meteoritics &Planetary Science, EarlyView.
Abstract Troilite is a common phase in iron meteorites, but there are limited data available for the partitioning behavior of elements between troilite and solid metal. In this study, we present the results of experiments with coexisting Fe‐Ni solid metal, an S‐rich metallic liquid, and troilite, conducted at 800–925°C in evacuated silica tubes at 1 ...
Nancy L. Chabot, Colin D. Hamill, Evangela E. Shread, Richard D. Ash, Catherine M. Corrigan   +4 more
wiley   +1 more source