Talk:Delta Velorum

Orbit of the eclipsing binary
The article cites Eker et al. (2014) for a "mean separation of 90.61 AU". With a period of 45.15 days, that can't be correct, and I can't find that data in the cited paper. They do give a semi-major axis of 97.915 solar radii (about 0.455 AU), which looks much more reasonable. -- Elphion (talk) 17:21, 2 October 2021 (UTC)

Quintuple System
The page for [Vela (constellation)] references that Delta Velorum is possibly a quintuple system, giving the following explanation:

Delta is actually a triple or possibly quintuple star system located around 80 light-years from the Solar System. Delta A has a magnitude of 1.99 and is an eclipsing binary composed of two A-type white stars (Delta Aa and Ab) which orbit each other every 45.2 days and lie 0.5 AU from each other, with a resulting drop in magnitude of 0.4 when the dimmer one passes.in front of the brighter. Delta B is a 5.1 magnitude yellow G-class star of similar dimensions to our sun which ranges between 26 and 72 AU away from the brighter pair, taking 142 years to complete a revolution. Further out still, at a distance of 1700 AU, are two red dwarfs of magnitudes 11 and 13. If they are part of the multiple system, they take 28000 years to complete an orbit.

This is the source provided: http://stars.astro.illinois.edu/sow/deltavel.html

I don't feel qualified to confirm or refute anything here, but I'll leave this talk comment up in case anyone is curious. Eiis1000 (talk) 14:53, 11 July 2022 (UTC)


 * That is just wrong. The source is outdated and the two "red dwarfs" are unrelated background stars, both more luminous than the Sun.  However, this paper finds that HIP 43797 is a co-moving companion.  Lithopsian (talk) 19:30, 11 July 2022 (UTC)