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A comet seeker with about 3.9 inch aperture was installed at the [[United States Naval Observatory]] in 1843, and later transferred to the Smithsonian Museum in 1866.<ref name=":0" /> It had an aperture of 4 inches (10.2&nbsp;cm) and was made by Utzschneider & Fraunhofer in Munich.<ref name=":3">{{Cite book|url=https://books.google.com/books?id=qrRz-sXyXJYC&pg=PA125&lpg=PA125&dq=66+cm+(26%22)+foggy+bottom&source=bl&ots=afper4Pxyk&sig=ACfU3U0nwNFqPVxn3Dpr7qxE6pryguuBjA&hl=en&sa=X&ved=2ahUKEwiKlYKqq4_lAhXJl-AKHct-C4wQ6AEwC3oECAYQAQ#v=onepage&q=66%20cm%20(26%22)%20foggy%20bottom&f=false|title=The General History of Astronomy|date=1900|publisher=Cambridge University Press|isbn=9780521242561|language=en}}</ref> This was operated as part of suite of several other instruments including a larger refractor on an equatorial mounting, a meridian transit, mural circle, etc.<ref name=":3" />
A comet seeker with about 3.9 inch aperture was installed at the [[United States Naval Observatory]] in 1843, and later transferred to the Smithsonian Museum in 1866.<ref name=":0" /> It had an aperture of 4 inches (10.2&nbsp;cm) and was made by Utzschneider & Fraunhofer in Munich.<ref name=":3">{{Cite book|url=https://books.google.com/books?id=qrRz-sXyXJYC&pg=PA125 |title=The General History of Astronomy|date=1900|publisher=Cambridge University Press|isbn=9780521242561|language=en}}</ref> This was operated as part of suite of several other instruments including a larger refractor on an equatorial mounting, a meridian transit, mural circle, etc.<ref name=":3" />


[[Markree Observatory]] added a 3-inch aperture Comet Seeker on an equatorial mount by Ertel.<ref name=":1">{{Cite web|url=http://adsabs.harvard.edu/full/1884Obs.....7..329D|title=1884Obs.....7..329D Page 329|website=adsabs.harvard.edu|access-date=2019-10-01}}</ref> It was ordered in 1842, and in place until 1874.<ref name=":1" />
[[Markree Observatory]] added a 3-inch aperture Comet Seeker on an equatorial mount by Ertel.<ref name=":1">{{cite journal |last = Doberck |first = William |title = Markree Observatory |journal = [[The Observatory (journal)|The Observatory]] |volume = 7 |issue = 91 |pages = 329–332 |date = 1884 |bibcode = 1884Obs.....7..329D }}</ref> It was ordered in 1842, and in place until 1874.<ref name=":1" />


The Markree Comet Seeker was used to discover [[9 Metis]] in April 1848.<ref name=":2">{{Cite book|url=https://books.google.com/books?id=wyWjVWYWoO8C&pg=PA138&lpg=PA138&dq=Markree+Observatory,+which+was+used+to+discover+9+Metis+in+1848.&source=bl&ots=fxJf3pAKDz&sig=ACfU3U1xuwFX3G6XmlX-cvwlFHjyJK-cBg&hl=en&sa=X&ved=2ahUKEwjC993ex_vkAhUMm-AKHQQKBHoQ6AEwA3oECAkQAQ#v=onepage&q=Markree%20Observatory,%20which%20was%20used%20to%20discover%209%20Metis%20in%201848.&f=false|title=Observing and Cataloguing Nebulae and Star Clusters: From Herschel to Dreyer's New General Catalogue|last=Steinicke|first=Wolfgang|date=2010-08-19|publisher=Cambridge University Press|isbn=9781139490108|language=en}}</ref> It was discovered by Edward Cooper's assistant Andrew Graham, who worked at that observatory until 1860.<ref name=":1" /><ref name=":2" /> Graham also observed and sketched the [[Orion Nebula|Orion nebula]] with this Ertel Comet seeker.<ref name=":2" />
The Markree Comet Seeker was used to discover [[9 Metis]] in April 1848.<ref name=":2">{{Cite book|url=https://books.google.com/books?id=wyWjVWYWoO8C&pg=PA138 |title=Observing and Cataloguing Nebulae and Star Clusters: From Herschel to Dreyer's New General Catalogue|last=Steinicke|first=Wolfgang|date=2010-08-19|publisher=Cambridge University Press|isbn=9781139490108|language=en}}</ref> It was discovered by Edward Cooper's assistant Andrew Graham, who worked at that observatory until 1860.<ref name=":1" /><ref name=":2" /> Graham also observed and sketched the [[Orion Nebula|Orion nebula]] with this Ertel Comet seeker.<ref name=":2" />


A 8.6 cm (~3.39 in.) aperture Comet Seeker was used, with some customizations, to produce the [[Bonner Durchmusterung]] star catalog from [[Bonn Observatory]], in the 19th century.<ref>{{Cite web|url=http://adsabs.harvard.edu/full/1987JBAA...97..339H|title=1987JBAA...97..339H Page 339|website=adsabs.harvard.edu|access-date=2019-10-12}}</ref>
An {{convert|8.6|cm|adj=on}} aperture Comet Seeker was used, with some customizations, to produce the [[Bonner Durchmusterung]] star catalog from [[Bonn Observatory]], in the 19th century.<ref>{{Cite journal |journal=Journal of the British Astronomical Association |title=Joseph Fraunhofer (1787-1826) |page=339 |volume=97 |year=1987 |number=6 |bibcode = 1987JBAA...97..339H}}</ref>


In 1866 a Comet Seeker telescope of {{convert|18|cm|inch|sigfig=2}} aperture by Martin was acquired by the [[Marseille Observatory|Marseilles Observator]]<nowiki/>y in France.<ref name=":02">{{Cite book|url=https://books.google.com/books?id=cWBDAAAAQBAJ&pg=PA121&dq=Marseille+Observatory&hl=en&newbks=1&newbks_redir=0&sa=X&ved=2ahUKEwikl_SZ_uflAhVCeawKHXgnBYkQ6AEwAHoECAQQAg#v=onepage&q=Marseille%20Observatory&f=false|title=Le Verrier—Magnificent and Detestable Astronomer|last=Lequeux|first=James|date=2013-03-15|publisher=Springer Science & Business Media|isbn=9781461455653|language=en}}</ref>
In 1866 a Comet Seeker telescope of {{convert|18|cm|inch|sigfig=2}} aperture by Martin was acquired by the [[Marseille Observatory]] in France.<ref name=":02">{{Cite book|url=https://books.google.com/books?id=cWBDAAAAQBAJ&pg=PA121 |title=Le Verrier—Magnificent and Detestable Astronomer|last=Lequeux|first=James|date=2013-03-15|publisher=Springer Science & Business Media|isbn=9781461455653|language=en}}</ref>


==See also==
==See also==

Revision as of 11:06, 23 July 2020

Comet seeker telescope, Helsinki observatory. Made by Utzschneider and Fraunhofer in 1830s.
A comet closeup, visited by a probe in the early 21st century
A comet as seen from Earth

A comet seeker is a type of small telescope adapted especially to searching for comets: commonly of short focal length and large aperture, in order to secure the greatest brilliancy of light. This style of telescope was used to discover the asteroid 9 Metis in 1848.

Design

A comet seeker telescope is a type of optical device that is known for having a short focal length but a wide field of view.[1]

Examples

A comet seeker with about 3.9 inch aperture was installed at the United States Naval Observatory in 1843, and later transferred to the Smithsonian Museum in 1866.[1] It had an aperture of 4 inches (10.2 cm) and was made by Utzschneider & Fraunhofer in Munich.[2] This was operated as part of suite of several other instruments including a larger refractor on an equatorial mounting, a meridian transit, mural circle, etc.[2]

Markree Observatory added a 3-inch aperture Comet Seeker on an equatorial mount by Ertel.[3] It was ordered in 1842, and in place until 1874.[3]

The Markree Comet Seeker was used to discover 9 Metis in April 1848.[4] It was discovered by Edward Cooper's assistant Andrew Graham, who worked at that observatory until 1860.[3][4] Graham also observed and sketched the Orion nebula with this Ertel Comet seeker.[4]

An 8.6-centimetre (3.4 in) aperture Comet Seeker was used, with some customizations, to produce the Bonner Durchmusterung star catalog from Bonn Observatory, in the 19th century.[5]

In 1866 a Comet Seeker telescope of 18 centimetres (7.1 in) aperture by Martin was acquired by the Marseille Observatory in France.[6]

See also

References

  •  This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Comet-seeker". Encyclopædia Britannica. Vol. 6 (11th ed.). Cambridge University Press. p. 763.
  1. ^ a b "Utzschneider & Fraunhofer, Merz & Mahler Refracting Telescope (Comet Seeker)". Smithsonian Institution. Retrieved 2019-10-01.
  2. ^ a b The General History of Astronomy. Cambridge University Press. 1900. ISBN 9780521242561.
  3. ^ a b c Doberck, William (1884). "Markree Observatory". The Observatory. 7 (91): 329–332. Bibcode:1884Obs.....7..329D.
  4. ^ a b c Steinicke, Wolfgang (2010-08-19). Observing and Cataloguing Nebulae and Star Clusters: From Herschel to Dreyer's New General Catalogue. Cambridge University Press. ISBN 9781139490108.
  5. ^ "Joseph Fraunhofer (1787-1826)". Journal of the British Astronomical Association. 97 (6): 339. 1987. Bibcode:1987JBAA...97..339H.
  6. ^ Lequeux, James (2013-03-15). Le Verrier—Magnificent and Detestable Astronomer. Springer Science & Business Media. ISBN 9781461455653.

External links


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