Difference between revisions of "Mons Hansteen"

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=Mons Hansteen=
 
=Mons Hansteen=
''(informal name "'''The Arrowhead'''"; previous IAU name: '''[/Hansteen Hansteen] Alpha''')''<br />  
+
''(informal name "'''The Arrowhead'''"; previous IAU name: '''[[Hansteen|Hansteen]] Alpha''')''<br />  
 
{| class="wiki_table"
 
{| class="wiki_table"
 
| colspan="2" |
 
| colspan="2" |
Lat: 12.18°S, Long: 50.18°W, Diam: 30.65 km, Height: 1 km, [/R%C3%BCkl%2040 Rükl: 40]<br />
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Lat: 12.18°S, Long: 50.18°W, Diam: 30.65 km, Height: 1 km, [[R%C3%BCkl%2040|Rükl: 40]]<br />
 
|-
 
|-
 
|
 
|
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[http://www.lpod.org/coppermine/thumbnails.php?album=search&type=full&search=Mons%20Hansteen LPOD Photo Gallery] [http://www.lpi.usra.edu/resources/lunar_orbiter/bin/srch_nam.shtml?Mons%20Hansteen%7C0 Lunar Orbiter Images]<br /> <br />  
 
[http://www.lpod.org/coppermine/thumbnails.php?album=search&type=full&search=Mons%20Hansteen LPOD Photo Gallery] [http://www.lpi.usra.edu/resources/lunar_orbiter/bin/srch_nam.shtml?Mons%20Hansteen%7C0 Lunar Orbiter Images]<br /> <br />  
 
==Maps==
 
==Maps==
''([/LAC%20zone LAC zone] 74C3 and 75D4)'' [http://www.lpi.usra.edu/resources/mapcatalog/LAC/lac75/ LAC map 74] [http://www.lpi.usra.edu/resources/mapcatalog/LAC/lac75/ LAC map 75] [http://www.lpi.usra.edu/resources/mapcatalog/usgs/I740/ Geologic map (west)] [http://www.lpi.usra.edu/resources/mapcatalog/usgs/I385/ Geologic map (east)]<br /> <br />  
+
''([[LAC%20zone|LAC zone]] 74C3 and 75D4)'' [http://www.lpi.usra.edu/resources/mapcatalog/LAC/lac75/ LAC map 74] [http://www.lpi.usra.edu/resources/mapcatalog/LAC/lac75/ LAC map 75] [http://www.lpi.usra.edu/resources/mapcatalog/usgs/I740/ Geologic map (west)] [http://www.lpi.usra.edu/resources/mapcatalog/usgs/I385/ Geologic map (east)]<br /> <br />  
 
==Description==
 
==Description==
  LPOD March 02, 2004: '''Hansteen Alpha''' is an example of a feature that amateurs generally haven't observed, but that professionals study in great detail. Easy to find between the floor-fractured crater [/Hansteen Hansteen] and the dark mare-filled crater [/Billy Billy] in southwestern [/Oceanus%20Procellarum Oceanus Procellarum], '''Hansteen Alpha''' (HA) is a bright triangular patch of knobby material about 25 km on a side. Because of its shape HA is commonly called "'''''The Arrowhead'''''." Using data from [/Clementine Clementine] and Lunar Prospector spacecraft, B. Ray Hawke and colleagues from the University of Hawaii recently noticed that HA is not covered by the ejecta of [/Hansteen Hansteen] and [/Billy Billy], even though they are close enough that HA should be. Therefore, the Arrowhead must be younger than those craters and the most likely interpretation is that it is an extrusive volcanic mound. The Arrowhead has a size, morphology and texture similar to terrestrial piles of dacitic or rhyolitic lavas that are quite viscous. Spectrally HA differs from mare basalt and has high thorium content, as do terrestrial viscous lavas. Here is an unique non-mare volcanic lunar landform that deserves high resolution imaging!<br /> <br />  
+
  LPOD March 02, 2004: '''Hansteen Alpha''' is an example of a feature that amateurs generally haven't observed, but that professionals study in great detail. Easy to find between the floor-fractured crater [[Hansteen|Hansteen]] and the dark mare-filled crater [[Billy|Billy]] in southwestern [[Oceanus%20Procellarum|Oceanus Procellarum]], '''Hansteen Alpha''' (HA) is a bright triangular patch of knobby material about 25 km on a side. Because of its shape HA is commonly called "'''''The Arrowhead'''''." Using data from [[Clementine|Clementine]] and Lunar Prospector spacecraft, B. Ray Hawke and colleagues from the University of Hawaii recently noticed that HA is not covered by the ejecta of [[Hansteen|Hansteen]] and [[Billy|Billy]], even though they are close enough that HA should be. Therefore, the Arrowhead must be younger than those craters and the most likely interpretation is that it is an extrusive volcanic mound. The Arrowhead has a size, morphology and texture similar to terrestrial piles of dacitic or rhyolitic lavas that are quite viscous. Spectrally HA differs from mare basalt and has high thorium content, as do terrestrial viscous lavas. Here is an unique non-mare volcanic lunar landform that deserves high resolution imaging!<br /> <br />  
 
===Elger===
 
===Elger===
''([/IAU%20Directions IAU Directions])'' … not far from the S.E. border of [/Hansteen Hansteen], is a curious triangular-shaped mountain mass, with a digitated outline on the S., and including a small bright crater on its area. Between this and {[/Hansteen Hansteen]} is a large but somewhat obscure depression, N. of which lies a rill-like object extending from the N. point of the triangular mountain to the E. wall.<br /> <br />  
+
''([[IAU%20Directions|IAU Directions]])'' … not far from the S.E. border of [[Hansteen|Hansteen]], is a curious triangular-shaped mountain mass, with a digitated outline on the S., and including a small bright crater on its area. Between this and {[[Hansteen|Hansteen]]} is a large but somewhat obscure depression, N. of which lies a rill-like object extending from the N. point of the triangular mountain to the E. wall.<br /> <br />  
 
==Additional Information==
 
==Additional Information==
 
* IAU page: [http://planetarynames.wr.usgs.gov/Feature/3985 Mons Hansteen]
 
* IAU page: [http://planetarynames.wr.usgs.gov/Feature/3985 Mons Hansteen]
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==Nomenclature==
 
==Nomenclature==
  
* In the original IAU nomenclature of [/Blagg%20and%20M%C3%BCller Blagg and Müller], this formation was known as '''[/Hansteen Hansteen] Alpha'''. That name was dropped in 1973 when the IAU decided to discontinue the Greek lettering system and introduce new individual names for important elevated features on the Moon ([/IAU%20Transactions%20XVB IAU Transactions XVB]). '''[/Hansteen Hansteen] Alpha''' was one of the few Greek lettered peaks to be officially renamed.
+
* In the original IAU nomenclature of [[Blagg%20and%20M%C3%BCller|Blagg and Müller]], this formation was known as '''[[Hansteen|Hansteen]] Alpha'''. That name was dropped in 1973 when the IAU decided to discontinue the Greek lettering system and introduce new individual names for important elevated features on the Moon ([[IAU%20Transactions%20XVB|IAU Transactions XVB]]). '''[[Hansteen|Hansteen]] Alpha''' was one of the few Greek lettered peaks to be officially renamed.
 
* Unofficially called (or nicknamed) '''''The Arrowhead''''' because of its shape. Not to be confused with the craterlet called '''Arrowhead''' in Apollo 15's [http://the-moon.us/wiki/South+Cluster South Cluster].
 
* Unofficially called (or nicknamed) '''''The Arrowhead''''' because of its shape. Not to be confused with the craterlet called '''Arrowhead''' in Apollo 15's [http://the-moon.us/wiki/South+Cluster South Cluster].
 
<br />  
 
<br />  
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* Glotch, T.D. and others (2010) [http://www.sciencemag.org/content/329/5998/1510.full Highly Silicic Compositions on the Moon]. Science 329 no. 5998 pp. 1510-1513.
 
* Glotch, T.D. and others (2010) [http://www.sciencemag.org/content/329/5998/1510.full Highly Silicic Compositions on the Moon]. Science 329 no. 5998 pp. 1510-1513.
 
* Hawke, B. Ray; Lawrence, D. J.; Blewett, D. T.; Lucey, P. G.; Smith, G. A.; Spudis, P. D.; Taylor, G. J. 2003. [http://adsabs.harvard.edu/abs/2003JGRE..108.5069H Hansteen Alpha: A volcanic construct in the lunar highlands]. ''Journal of Geophysical Research Planets'', Volume 108, Issue E7, pp. 5-1, CiteID 5069.
 
* Hawke, B. Ray; Lawrence, D. J.; Blewett, D. T.; Lucey, P. G.; Smith, G. A.; Spudis, P. D.; Taylor, G. J. 2003. [http://adsabs.harvard.edu/abs/2003JGRE..108.5069H Hansteen Alpha: A volcanic construct in the lunar highlands]. ''Journal of Geophysical Research Planets'', Volume 108, Issue E7, pp. 5-1, CiteID 5069.
* Wagner, R.; Head, J. W., III; Wolf, U.; Neukum, G. 2004.[http://adsabs.harvard.edu/abs/2004LPI....35.1842W The Hansteen and Helmet Volcanic Dome Regions on the Moon: Stratigraphy and Ages]. ''Lunar & Planet. Sci.'' 35, 1842. (note: this article refers to '''Hansteen Alpha''' as a nearby "major impact feature ... a crater whose floor is partly flooded by mare laves". This sounds like a reference to [/Hansteen Hansteen] itself. <span class="membersnap">- [http://www.wikispaces.com/user/view/JimMosher [[Image:JimMosher-lg.jpg|16px|JimMosher]]] [http://www.wikispaces.com/user/view/JimMosher JimMosher]</span>)
+
* Wagner, R.; Head, J. W., III; Wolf, U.; Neukum, G. 2004.[http://adsabs.harvard.edu/abs/2004LPI....35.1842W The Hansteen and Helmet Volcanic Dome Regions on the Moon: Stratigraphy and Ages]. ''Lunar & Planet. Sci.'' 35, 1842. (note: this article refers to '''Hansteen Alpha''' as a nearby "major impact feature ... a crater whose floor is partly flooded by mare laves". This sounds like a reference to [[Hansteen|Hansteen]] itself. <span class="membersnap">- [http://www.wikispaces.com/user/view/JimMosher [[Image:JimMosher-lg.jpg|16px|JimMosher]]] [http://www.wikispaces.com/user/view/JimMosher JimMosher]</span>)
 
* Hawke, B.R. and others (2012) [http://www.lpi.usra.edu/meetings/lpsc2012/pdf/1754.pdf The Geology and Composition of Hansteen Alpha] 43rd LPSC #1754.
 
* Hawke, B.R. and others (2012) [http://www.lpi.usra.edu/meetings/lpsc2012/pdf/1754.pdf The Geology and Composition of Hansteen Alpha] 43rd LPSC #1754.
 
<br />
 
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[/Alphabetical%20Index Named Features] -- Prev: [/Hansteen Hansteen] -- Next: [/Rima%20Hansteen Rima Hansteen]<br />
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[[Alphabetical%20Index|Named Features]] -- Prev: [[Hansteen|Hansteen]] -- Next: [[Rima%20Hansteen|Rima Hansteen]]<br />
 
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  This page has been edited 1 times. The last modification was made by <span class="membersnap">- [http://www.wikispaces.com/user/view/tychocrater [[Image:tychocrater-lg.jpg|16px|tychocrater]]] [http://www.wikispaces.com/user/view/tychocrater tychocrater]</span> on Jun 13, 2009 3:24 pm - ''afx4u3''</div>
 
  This page has been edited 1 times. The last modification was made by <span class="membersnap">- [http://www.wikispaces.com/user/view/tychocrater [[Image:tychocrater-lg.jpg|16px|tychocrater]]] [http://www.wikispaces.com/user/view/tychocrater tychocrater]</span> on Jun 13, 2009 3:24 pm - ''afx4u3''</div>

Revision as of 15:04, 15 April 2018

Mons Hansteen

(informal name "The Arrowhead"; previous IAU name: Hansteen Alpha)

Lat: 12.18°S, Long: 50.18°W, Diam: 30.65 km, Height: 1 km, Rükl: 40

external image normal_MonsHansteen-M117826631ME.jpg

external image normal_Arrowhead%20-%20IV-149-H2.jpg

Left: LROC image WAC No. M117826631ME (calibrated by LROC_WAC_Previewer).
Right: Lunar Orbiter IV 149 H2 submitted by Stefan Lammel

Table of Contents

[#Mons Hansteen Mons Hansteen]
[#Mons Hansteen-Images Images]
[#Mons Hansteen-Maps Maps]
[#Mons Hansteen-Description Description]
[#Mons Hansteen-Description-Elger Elger]
[#Mons Hansteen-Additional Information Additional Information]
[#Mons Hansteen-Nomenclature Nomenclature]
[#Mons Hansteen-LROC Articles LROC Articles]
[#Mons Hansteen-LPOD Articles LPOD Articles]
[#Mons Hansteen-Bibliography Bibliography]

Images

LPOD Photo Gallery Lunar Orbiter Images

Maps

(LAC zone 74C3 and 75D4) LAC map 74 LAC map 75 Geologic map (west) Geologic map (east)

Description

LPOD March 02, 2004: Hansteen Alpha is an example of a feature that amateurs generally haven't observed, but that professionals study in great detail. Easy to find between the floor-fractured crater Hansteen and the dark mare-filled crater Billy in southwestern Oceanus Procellarum, Hansteen Alpha (HA) is a bright triangular patch of knobby material about 25 km on a side. Because of its shape HA is commonly called "The Arrowhead." Using data from Clementine and Lunar Prospector spacecraft, B. Ray Hawke and colleagues from the University of Hawaii recently noticed that HA is not covered by the ejecta of Hansteen and Billy, even though they are close enough that HA should be. Therefore, the Arrowhead must be younger than those craters and the most likely interpretation is that it is an extrusive volcanic mound. The Arrowhead has a size, morphology and texture similar to terrestrial piles of dacitic or rhyolitic lavas that are quite viscous. Spectrally HA differs from mare basalt and has high thorium content, as do terrestrial viscous lavas. Here is an unique non-mare volcanic lunar landform that deserves high resolution imaging!

Elger

(IAU Directions) … not far from the S.E. border of Hansteen, is a curious triangular-shaped mountain mass, with a digitated outline on the S., and including a small bright crater on its area. Between this and {Hansteen} is a large but somewhat obscure depression, N. of which lies a rill-like object extending from the N. point of the triangular mountain to the E. wall.

Additional Information

  • IAU page: Mons Hansteen
  • Lunar Orbiter IV image 149H shows a few peaks within the Arrowhead casting shadows to the west. The lengths of the shadows indicate height differences of 500-600 m. The lower sun angle view of Consolidated Lunar Atlas plate E23 suggests that the main landmass rises about 1000 m above the mare. - JimMosher JimMosher
  • I am unable to see the bright crater mentioned by Elger. - JimMosher JimMosher
  • Diviner IR data identifies this as one of the most silica-rich volcanic regions of the Moon. (Glotch et al, , 2010).
  • The remarkable yellowish/reddish coloration of Mons Hansteen (The Arrowhead) is captured on the LROC's WAC albedo/color map, see close up of Mons Hansteen and its neighbors Billy and Hansteen: http://bit.ly/1AMYkMQ


Nomenclature

  • In the original IAU nomenclature of Blagg and Müller, this formation was known as Hansteen Alpha. That name was dropped in 1973 when the IAU decided to discontinue the Greek lettering system and introduce new individual names for important elevated features on the Moon (IAU Transactions XVB). Hansteen Alpha was one of the few Greek lettered peaks to be officially renamed.
  • Unofficially called (or nicknamed) The Arrowhead because of its shape. Not to be confused with the craterlet called Arrowhead in Apollo 15's South Cluster.


LROC Articles


LPOD Articles


Bibliography



Named Features -- Prev: Hansteen -- Next: Rima Hansteen


This page has been edited 1 times. The last modification was made by - tychocrater tychocrater on Jun 13, 2009 3:24 pm - afx4u3