Talk:Nereid (moon)

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Diagram/animation[edit]

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

Agreed. Its defining property per the leader text is that "it has a highly eccentric orbit"... — Preceding unsigned comment added by 88.104.204.41 (talk) 22:25, 21 November 2013 (UTC)[reply]

Untitled[edit]

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[edit]

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[edit]

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)[reply]

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)[reply]

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)[reply]

Inclination[edit]

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)[reply]

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)[reply]