Borrelly - Revision history

Stefanido at 17:14, 25 March 2010

2010-03-25T17:14:46Z

Stefanido: picture size

2010-03-24T17:31:17Z

picture size

Stefanido: added photo

2010-03-12T17:56:26Z

added photo

Stefanido at 17:49, 12 March 2010

2010-03-12T17:49:32Z

Max.Jeffcott: /* Spacesim Missions */

2010-03-11T02:25:27Z

‎Spacesim Missions

Stefanido at 22:29, 10 March 2010

2010-03-10T22:29:10Z

Stefanido at 22:26, 10 March 2010

2010-03-10T22:26:57Z

Stefanido: New page: {{Planet|picture= |cat=Comet |size=Bowling Pin; r = 4km ; h = 8km |type=Main Mission |}} '''Borrelly''' was discovered by Alphonse Louis Nicolas Borrelly during a routine ...

2010-03-10T22:11:43Z

New page: {{Planet|picture= |cat=Comet |size=Bowling Pin; r = 4km ; h = 8km |type=Main Mission |}} '''Borrelly''' was discovered by Alphonse Louis Nicolas Borrelly during a routine ...

New page

{{Planet|picture=
|cat=Comet
|size=[[Bowling Pin]]; r = 4km ; h = 8km
|type=[[Mission|Main Mission]]
|}}

'''Borrelly''' was discovered by Alphonse Louis Nicolas Borrelly during a routine search for comets at Marseilles, France on December 28, 1904. Deep Space 1 flew about 1350 miles from the nucleus on September 22, 2001. Borrelly is a typical short period comet; it has a period of 6.8 years (currently; it has approached Jupiter 3 times in the 20th century and had its orbit and period adjusted each time). At perihelion, it is 1.35AU from the sun (just inside the orbit of Mars) and at aphelion, it is 5.83 AU from the sun (just outside the orbit of Jupiter); it has an eccentricity of 0.624. The nucleus is shaped sort of like a bowling pin, 8x4 km. It has three "jets" firing material off into the coma; the longest (the one on the rotation axis) is ~60 km long. Each jet comes out of a particularly bright and smooth, but concave part of the comet, and it is believed that the comet is eroding fastest near them. The nucleus is about the colour of asphalt (3% albedo); the coma and tail produce much of the light viewed. This makes the nucleus the darkest known object in the solar system (although Halley is #2 at 4%, and the fact that the only two comets approached are extraordinarily dark suggests that most comets are this dark). The crust is believed to be iron or carbon. The fact that the relatively smooth erosion centres are much brighter has led to suggestions that the albedo comes partly from colour but also from texture, of which the comet has a great deal (hills, craters, general cragginess). The comet is not so much a "dirty iceball" as a "icy dirtball". Deep Impact indicated that comets (or at least Tempel-1) seem to be not very dense; Tempel-1 is maybe 25% by volume ice grains loosely packed together, covered in a layer a couple of meters deep of very fine silicate dust, trace hydrocarbons and organics (including clays and calcium carbonates).

← Older revision		Revision as of 17:14, 25 March 2010
Line 27:		Line 27:
	*[http://antwrp.gsfc.nasa.gov/apod/ap010926.html Astronomy Picture of the Day: Borrelly]		*[http://antwrp.gsfc.nasa.gov/apod/ap010926.html Astronomy Picture of the Day: Borrelly]
	*[http://nmp.jpl.nasa.gov/ds1/ Deep Space 1 Project Website]		*[http://nmp.jpl.nasa.gov/ds1/ Deep Space 1 Project Website]
		+
		+	{{PlanetNav}}

@@ Line 1: / Line 1: @@
-{{Planet|picture=[[Image:Borrelly.jpg|250px]]
+{{Planet|picture=Borrelly.jpg
 |cat=Comet
 |size=[[Bowling Pin]]; r = 4km ; h = 8km

@@ Line 14: / Line 14: @@
 At perihelion, it is 1.35AU from the sun (just inside the orbit of [[Mars]]) and at aphelion, it is 5.83 AU from the sun (just outside the orbit of Jupiter); it has an eccentricity of 0.624. The nucleus is shaped sort of like a bowling pin, 8x4 km.
-It has three "jets" firing material off into the coma; the longest (the one on the rotation axis) is ~60 km long. Each jet comes out of a particularly bright and smooth, but concave part of the comet, and it is believed that the comet is eroding fastest near them.
+[[Image:Borrelly_Jets.jpg|left|thumb|150px|A composite of Borrelly by the Deep Space 1 team showing the dust plumes coming off of the comet.]]It has three "jets" firing material off into the coma; the longest (the one on the rotation axis) is ~60 km long. Each jet comes out of a particularly bright and smooth, but concave part of the comet, and it is believed that the comet is eroding fastest near them.
 The nucleus is about the colour of asphalt (3% albedo); the coma and tail produce much of the light viewed. This makes the nucleus the darkest known object in the solar system (although Halley is #2 at 4%, and the fact that the only two comets approached are extraordinarily dark suggests that most comets are this dark). The crust is believed to be iron or carbon. The fact that the relatively smooth erosion centres are much brighter has led to suggestions that the albedo comes partly from colour but also from texture, of which the comet has a great deal (hills, craters, general cragginess).
@@ Line 26: / Line 26: @@
 *[http://www.spacesim.org/Spacesim/Archives/archives%28borrelly_2007%29.htm Pre-Mission Research 2006-07]
 *[http://antwrp.gsfc.nasa.gov/apod/ap010926.html Astronomy Picture of the Day: Borrelly]

@@ Line 1: / Line 1: @@
-{{Planet|picture=
+{{Planet|picture=[[Image:Borrelly.jpg|250px]]
 |cat=Comet
 |size=[[Bowling Pin]]; r = 4km ; h = 8km
@@ Line 25: / Line 25: @@
 ==Sources==
 *[http://www.spacesim.org/Spacesim/Archives/archives%28borrelly_2007%29.htm Pre-Mission Research 2006-07]

@@ Line 21: / Line 21: @@
 ==Spacesim Missions==
-Spacesim has only visited Borrelly once during [[Coronis|Coronis 2007]].
+Spacesim has visited Borrelly once on a [[main mission]], in [[2006-07|2007's]] [[Coronis]] mission.
 ==Sources==
 *[http://www.spacesim.org/Spacesim/Archives/archives%28borrelly_2007%29.htm Pre-Mission Research 2006-07]

@@ Line 5: / Line 5: @@
 |}}
-'''Borrelly''' is a comet a short period comet.
+'''Borrelly''' is a short period comet.
 ==Pre-Mission Research==

← Older revision		Revision as of 22:26, 10 March 2010
Line 5:		Line 5:
	\|}}		\|}}

−	'''Borrelly''' was discovered by Alphonse Louis Nicolas Borrelly during a routine search for comets at Marseilles, France on December 28, 1904. Deep Space 1 flew about 1350 miles from the nucleus on September 22, 2001. Borrelly is a typical short period comet; it has a period of 6.8 years (currently; it has approached Jupiter 3 times in the 20th century and had its orbit and period adjusted each time). At perihelion, it is 1.35AU from the sun (just inside the orbit of Mars) and at aphelion, it is 5.83 AU from the sun (just outside the orbit of Jupiter); it has an eccentricity of 0.624. The nucleus is shaped sort of like a bowling pin, 8x4 km. It has three "jets" firing material off into the coma; the longest (the one on the rotation axis) is ~60 km long. Each jet comes out of a particularly bright and smooth, but concave part of the comet, and it is believed that the comet is eroding fastest near them. The nucleus is about the colour of asphalt (3% albedo); the coma and tail produce much of the light viewed. This makes the nucleus the darkest known object in the solar system (although Halley is #2 at 4%, and the fact that the only two comets approached are extraordinarily dark suggests that most comets are this dark). The crust is believed to be iron or carbon. The fact that the relatively smooth erosion centres are much brighter has led to suggestions that the albedo comes partly from colour but also from texture, of which the comet has a great deal (hills, craters, general cragginess). The comet is not so much a "dirty iceball" as a "icy dirtball". Deep Impact indicated that comets (or at least Tempel-1) seem to be not very dense; Tempel-1 is maybe 25% by volume ice grains loosely packed together, covered in a layer a couple of meters deep of very fine silicate dust, trace hydrocarbons and organics (including clays and calcium carbonates).	+	'''Borrelly''' is a comet a short period comet.
		+
		+	==Pre-Mission Research==
		+	It was discovered by Alphonse Louis Nicolas Borrelly during a routine search for comets at Marseilles, France on December 28, 1904.
		+
		+	Deep Space 1 flew about 1350 miles from the nucleus on September 22, 2001. Borrelly is a typical short period comet; it has a period of 6.8 years (currently; it has approached [[Jupiter]] 3 times in the 20th century and had its orbit and period adjusted each time).
		+
		+	At perihelion, it is 1.35AU from the sun (just inside the orbit of [[Mars]]) and at aphelion, it is 5.83 AU from the sun (just outside the orbit of Jupiter); it has an eccentricity of 0.624. The nucleus is shaped sort of like a bowling pin, 8x4 km.
		+
		+	It has three "jets" firing material off into the coma; the longest (the one on the rotation axis) is ~60 km long. Each jet comes out of a particularly bright and smooth, but concave part of the comet, and it is believed that the comet is eroding fastest near them.
		+
		+	The nucleus is about the colour of asphalt (3% albedo); the coma and tail produce much of the light viewed. This makes the nucleus the darkest known object in the solar system (although Halley is #2 at 4%, and the fact that the only two comets approached are extraordinarily dark suggests that most comets are this dark). The crust is believed to be iron or carbon. The fact that the relatively smooth erosion centres are much brighter has led to suggestions that the albedo comes partly from colour but also from texture, of which the comet has a great deal (hills, craters, general cragginess).
		+
		+	The comet is not so much a "dirty iceball" as a "icy dirtball". Deep Impact indicated that comets (or at least Tempel-1) seem to be not very dense; Tempel-1 is maybe 25% by volume ice grains loosely packed together, covered in a layer a couple of meters deep of very fine silicate dust, trace hydrocarbons and organics (including clays and calcium carbonates).
		+
		+	==Spacesim Missions==
		+	Spacesim has only visited Borrelly once during [[Coronis\|Coronis 2007]].
		+
		+	==Sources==
		+	*[http://www.spacesim.org/Spacesim/Archives/archives%28borrelly_2007%29.htm Pre-Mission Research 2006-07]