Talk:7 Iris

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Per the OED, the adjectival form is Iridian (eye-rid'-ee-un). kwami 07:05, 2005 Jun 19 (UTC)

Newer source lists Mass ≈ 2.39×10¹⁹Kg [1] Will wait 1 week for feedback on this one before updating. Abyssoft 04:47, 4 September 2006 (UTC)

Here's what mass estimates i've been able to track down:

Author	Year	Mass (in Solar mass × 10-12)	note	link
Pitjeva	2004	5.2 ± 0.8		[2]
Kuznetsov	2001	15.6 ± 3.8	repeated by Kochetova
Kochetova	2004	14.1 ± 1.4	reference mentioned in the link above	[3]
Chernetenko et al	2005	12.0 ± 0.9	the webpage mentioned above (same group as Kochetova)	[4]
Pitjeva	2005	6.3 ± 0.1	IAU Ephemeris	[5]

The new estimates seem to agree with each other here, but they give pretty mad densities for an S-type asteroid. Even the latest slightly smaller value of 12.0 leads to 5.6 g/cm³. I might believe that for an M type, but it looks pretty suspicious here.

I would go with the old Pitjeva value and maybe reference the new website next to it for completeness. Deuar 23:30, 4 September 2006 (UTC)

I updated the above table and the article to use the latest Pitjeva values. —RP88 17:51, 15 March 2007 (UTC)