Talk:Nereid (moon)

From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Solar System (Rated Start-class, Low-importance)
WikiProject icon
Portal icon Solar System portal
This article is within the scope of WikiProject Solar System, a collaborative effort to improve the coverage of the Solar System on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Start-Class article Start  This article has been rated as Start-Class on the project's quality scale.
 Low  This article has been rated as Low-importance on the project's importance scale.
 
For more information, see the Solar System importance assessment guideline.
WikiProject Astronomy / Astronomical objects  (Rated C-class, Mid-importance)
WikiProject icon
Portal icon Astronomy portal
Nereid (moon) is within the scope of WikiProject Astronomy, which collaborates on articles related to Astronomy on Wikipedia.
C-Class article C  This article has been rated as C-Class on the project's quality scale.
 Mid  This article has been rated as Mid-importance on the project's importance scale.
Taskforce icon
 This article is supported by WikiProject Astronomical objects, which collaborates on articles related to astronomical objects.
 

Contents

Diagram/animation

This article could really use a diagram or animation demonstrating the eccentricity of Nereid's orbit.

Untitled

I moved the article about article here to avoid confusion between Nereid (was the moon), Nereids (Greek Mythology sea nymphs) and Nereids (?) -- Looxix 23:19 May 9, 2003 (UTC)

Pronounciation

Not sure what pronunciation "NER ay id" was supposed to represent. Sources (Bulfinch's, Columbia Encyclopedia, JPL/NASA) agree on [NEER-ee-id], so I changed it. --kwami 00:58, 13 Aug 2004 (UTC)

Other sources with neer'-ee-id: Morford & Lenardon, Tripp. Gayley has ni-ree'-i-deez for the plural.

The OED has neer'-ee-id for the US & UK, and nair'-ee-id as an alternate pronunciation for the UK. I'll put that in the article. Adjectival forms in the OED: older 'Nereidean' (no pronunciation), more recent 'Nereidian' (neer'-ee-id'-ee-un, nair'-). kwami 2005 June 30 07:50 (UTC)

Mass + Density

JPL says the mass is 2 x 10^19, but this article says it's 3.1 x 10^19 Bill Arnett (http://seds.lpl.arizona.edu/nineplanets/nineplanets/) says it is unknown I would love to know where someone got this 3.1 x 10^19 and whether it is a reliable estimate --68.5.100.199 04:44, 18 December 2006 (UTC)

I think someone assumed(?) a density of 1.5g/cm^3. Most unexplored moons appear to assume a density of 1.3g/cm^3. With a radius of 170km you get the volume of a sphere of 20579526 km^3. Using a density of 1.3g/cm^3 yields a mass of 2.6e19 kg (1.3*20579526*10^12). Using a density of 1.5g/cm^3 yields a mass of 3.08e19 kg. -- Kheider (talk) 17:57, 22 January 2008 (UTC)
The source referenced in the article ([1]) says that if there's no uncertainty then density is assumed. 83.27.43.118 (talk) 14:19, 7 June 2008 (UTC)

Inclination

This page says the inclination to ecliptic is 5.07 degrees but NASA gives 27.6 degrees: http://solarsystem.nasa.gov/planets/profile.cfm?Object=Nep_Nereid&Display=Facts&System=Metric. Sergey feo (talk) 20:43, 29 March 2009 (UTC)

The current (Epoch 2008 Nov. 30.0) inclination is 5.05. The NASA page shows that it was last updated on 2003-10-06. As the eccentricity varies so will the inclination... -- Kheider (talk) 21:23, 29 March 2009 (UTC)