Neowise Comet 2020

Discussion in 'Off-Topic' started by litesong, Jul 13, 2020.

  1. litesong

    litesong litesong

    Last night, observed Sirius, 8.6 light-years distant(51 million million miles), 5th nearest star, shining hotter & 23 times brighter than our sun, Sol. It is 1.8 times the diameter & 2.3 times the mass of Sol. It’s radial motion is towards us at 4.5 miles per second. But, it won’t hit us, because it has “proper motion” that has moved Sirius “to the side” at 1.5 times the width of our Moon in the last 2000 years. Tho “near” us, Sirius is still 550,000 times further from us than Sol is from us(~93 million miles). This brightest star in the sky appeared sweet in the Pentax lens. Yes, I love the rendition of brightest stars that the Pentax gives. The Pentax gives them a creamy smooth appearance, despite the gittery, multi-faceted look that the turbulent atmosphere adds. Also, love to stop the lens down, to see how stars look, as they would appear in smaller telescopes. Tried to see Sirius B, the dim orbiting white dwarf star, but couldn’t see it. Should be able to see it in the Pentax, but the glare from Sirius A is disastrous. Will keep trying.
    Went to Epsilon Orionis, 2000 light years distant, & equal to 40times the diameter & 300-800,000 times the brightness of Sol. It is the middle star in the “Belt stars” of Orion, the Hunter, & I went hunting for double stars nearby. SW of Epsilon I saw an excellent trio(quadruple?) of stars, but do not know if they are officially listed as a triple star. But, SW(?) of the “triple”, I saw a cute, but dim set of 2 fairly matched bluish(?) stars. I think it was Struve 731, about 5arcseconds apart. Yeah, with all the bright stars around, I did dote on these dim 8.5 & 9 Magnitude stars. I’ll try to figure its Position Angle & see if that agrees with the listing for Struve 731. Anyhow, as normal here in Washington state, the clouds rolled in & my time among the stars ended.
     
    Last edited: Feb 11, 2021

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