HD 10307 (HR 483) is a
spectroscopic binary star in the constellation
Andromeda. The primary is similar to the
Sun
The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core. The Sun radiates this energy mainly as light, ultraviolet, and infrared radi ...
in mass, temperature and metal content. situated about 42 light-years from
Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...
Its companion, HR 483 B, is a little-studied
red dwarf.
HD 10307 was identified in September 2003 by astrobiologist
Margaret Turnbull
Margaret Carol "Maggie" Turnbull (born 1975) is an American astronomer and astrobiologist. She received her PhD in Astronomy from the University of Arizona in 2004. Turnbull is an authority on star systems which may have habitable planets, so ...
from the
University of Arizona
The University of Arizona (Arizona, U of A, UArizona, or UA) is a public land-grant research university in Tucson, Arizona. Founded in 1885 by the 13th Arizona Territorial Legislature, it was the first university in the Arizona Territory.
T ...
in
Tucson
, "(at the) base of the black ill
, nicknames = "The Old Pueblo", "Optics Valley", "America's biggest small town"
, image_map =
, mapsize = 260px
, map_caption = Interactive map ...
as one of the most promising nearby candidates for hosting life based on her analysis of the
HabCat list of stars.
[
]
System
HR 483 is a binary located 42.6 ly away, in Andromeda. The two stars orbit one another elliptically ( e=0.44),[ approaching as close as 4.2 AU and receding to 10.5 AU, with a period of just under twenty years.][
HD 10307 A, the larger component, is a G-type main-sequence star similar to the Sun, only slightly brighter, hotter, larger, and older than the Sun—though with a slightly smaller mass. It has a low level of activity and is a candidate Maunder minimum analog.][ A ]debris disk
A debris disk (American English), or debris disc (Commonwealth English), is a circumstellar disk of dust and debris in orbit around a star. Sometimes these disks contain prominent rings, as seen in the image of Fomalhaut on the right. Debris di ...
has been detected in this system.[
The presence of a moderately close companion could disrupt the orbit of a hypothetical planet in HD 10307's ]habitable zone
In astronomy and astrobiology, the circumstellar habitable zone (CHZ), or simply the habitable zone, is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure.J. F. Kast ...
. However, the uncertainty of the orbital parameters makes it equally uncertain exactly where stable orbits would be in this system.
METI message to HD 10307
There was a METI message sent to HD 10307. It was transmitted from Eurasia
Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Japanese archipelago ...
's largest radar
Radar is a detection system that uses radio waves to determine the distance ('' ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, we ...
, 70-meter Eupatoria Planetary Radar. The message was named Cosmic Call 2, it was sent on July 6, 2003, and it will arrive at HD 10307 in September 2044.[ http://www.cplire.ru/rus/ra&sr/VAK-2004.html]
References
External links
High proper-motion Star
Image HD 10307
* ttps://web.archive.org/web/20060901165959/http://stellar.phys.appstate.edu/cgi-bin/spectra/specdisplay.pl?starname=HD10307 Spectra HD 10307
{{DEFAULTSORT:HD 10307
G-type main-sequence stars
M-type main-sequence stars
Solar analogs
Maunder Minimum
Spectroscopic binaries
Andromeda (constellation)
Durchmusterung objects
010307
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