About: V841 Ophiuchi

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V841 Ophiuchi (Nova Ophiuchi 1848) was a bright nova discovered by John Russell Hind on 27 April 1848. It was the first object of its type discovered since 1670. At the time of its discovery, it had an apparent magnitude of 5.6, but may have reached magnitude 2 at its peak, making it easily visible to the naked eye. Near peak brightness it was described as "bright red" or "scalet", probably due to Hα line emission. Its brightness is currently varying slowly around magnitude 13.5. The area of the sky surrounding this nova had been examined frequently by astronomers prior to the nova's discovery, because it was near the reported location of "52 Serpentis", a star John Flamsteed had included in his catalogue with erroneous coordinates.

Attributes	Values
rdf:type	Thing place dbo:Location schema:Place celestial body star
rdfs:label	V841 Ophiuchi (en)
rdfs:comment	V841 Ophiuchi (Nova Ophiuchi 1848) was a bright nova discovered by John Russell Hind on 27 April 1848. It was the first object of its type discovered since 1670. At the time of its discovery, it had an apparent magnitude of 5.6, but may have reached magnitude 2 at its peak, making it easily visible to the naked eye. Near peak brightness it was described as "bright red" or "scalet", probably due to Hα line emission. Its brightness is currently varying slowly around magnitude 13.5. The area of the sky surrounding this nova had been examined frequently by astronomers prior to the nova's discovery, because it was near the reported location of "52 Serpentis", a star John Flamsteed had included in his catalogue with erroneous coordinates. (en)
foaf:depiction
dcterms:subject	Hercules (constellation) Objects with variable star designations 1848 in science Novae
Wikipage page ID	66005131 (xsd:integer)
Wikipage revision ID	1117762851 (xsd:integer)
Link from a Wikipage to another Wikipage	John Russell Hind Nova Stellar classification Hercules (constellation) Objects with variable star designations 1848 in science Apparent magnitude H-alpha Novae John Flamsteed Eclipsing binary Solar cycle Ophiuchus Variable star designation Cataclysmic variable AAVSO
sameAs	V841 Ophiuchi V841 Ophiuchi
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thumbnail	wiki-commons:Special:FilePath/V841OphLocation.png?width=300
appmag v	4.300000 (xsd:double)
constell	Ophiuchus
epoch	J2000.0 (en)
has abstract	V841 Ophiuchi (Nova Ophiuchi 1848) was a bright nova discovered by John Russell Hind on 27 April 1848. It was the first object of its type discovered since 1670. At the time of its discovery, it had an apparent magnitude of 5.6, but may have reached magnitude 2 at its peak, making it easily visible to the naked eye. Near peak brightness it was described as "bright red" or "scalet", probably due to Hα line emission. Its brightness is currently varying slowly around magnitude 13.5. The area of the sky surrounding this nova had been examined frequently by astronomers prior to the nova's discovery, because it was near the reported location of "52 Serpentis", a star John Flamsteed had included in his catalogue with erroneous coordinates. Like all cataclysmic variable (CV) stars, novae are short-period binary stars with a "donor" star transferring material to a white dwarf. In the case of V841 Ophiuchi, the orbital period is 14.43 hours, which is unusually long for a CV; the vast majority of such systems have periods below 10 hours. Peters and Thorstensen derive an orbital inclination of 30°±10 with respect to our line of sight which, combined with the relatively large separation implied by the orbital period, would explain why V841 Ophiuchi is not an eclipsing binary. They also found that the donor star is somewhat cooler than the Sun, with a spectral type of K3±2. Modern observations during a 30-year time interval show that V841 Ophiuchi undergoes regular brightness variations with a period of 3.4 years, and an amplitude of about 0.3 magnitudes, which may be due to oscillations in the donor star similar to our Sun's solar cycle. Nonperiodic "flickering" brightness variations have been reported, on timescales as short as 100 seconds. (en)
prov:wasDerivedFrom	wikipedia-en:V841_Ophiuchi?oldid=1117762851&ns=0
page length (characters) of wiki page	5774 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:V841_Ophiuchi
is Link from a Wikipage to another Wikipage of	John Russell Hind List of novae in the Milky Way galaxy Ophiuchus in Chinese astronomy CK Vulpeculae Stars named after people
is foaf:primaryTopic of	wikipedia-en:V841_Ophiuchi

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