Tag Archives: A/2017 U1

This Latest Interstellar Comet, 2I/Borisov, Is By NO Means The Only Comet To Spew Cyanide Gas. Quite Common!

by Anura Guruge


From ‘Google News’. It was BIG in … astronomy news.


Click to ENLARGE. From my ‘Comets 101’ book. Link below.


Yes, everybody is trying to cash in on this Interstellar Comet — supposedly the second we have discovered (albeit, both in the last 2-years). When I saw the headlines about cyanide it made me smile. I knew that cyanide was not uncommon in comets.

Recall Halley’s comet that comes around every 75-76 years. In the early 20th century there was a scare that folks would die from the cyanide that was emanating from its tail. Well nobody did.

So, please don’t get excited about this cyanide. It will NOT kill you or anybody else.


Has a ton of good information about comets.

Related Posts:
Check Categories ‘Events’ &  ‘Astronomy’.


by Anura Guruge

TWO ‘Interstellar Comets’ In Less Than 2-Years — And We Have Never Seen ANY Before?

by Anura Guruge


Click to ENLARGE and study. See image below for origin — viz. JPL Small Body Database Browser.


Click to ENLARGE and study. JPL Small-Ball Database Browser.


Click to access ‘spaceweather.com’ and read the original.


Click to access my 2017 post.


I will grant that this new comet, C/2019 Q4 (Borisov), does have more of an intriguing orbital path than did C/2017 U1.

But, I am not willing to RUSH to the conclusion that it is interstellar — i.e., it did NOT originate in our own Oort cloud. Still very early days. That it is travelling too fast to be bound to the Sun is interesting.

I was not convinced about A/2017 U1 (ʻOumuamua) being interstellar and now others are joining in. SMILE. I do know some about comets.

All I am saying, for now, is don’t rush to a conclusion. Let’s study this puppy a bit more.

Definitely not going to be GREAT comet. It will be very far from the Sun. Twice as far as the Earth is to the Sun. So, unlikely that it will be very bright or sport a spectacular tail.

Just wanted to keep YOU in the loop. But, stay tuned.


Has a ton of good information about comets.

Related Posts:
Check Categories ‘Events’ &  ‘Astronomy’.


by Anura Guruge

A/2017 U1 — Too Speculative To Claim That It Is ‘Interstellar’.

by Anura Guruge


Click to ENLARGE. From NASA/JPL @ http://www.jpl.nasa.gov.


Click to ENLARGE. Wikipedia: en.wikipedia.org/wiki/A/2017_U1


Definitely extremely interesting and intriguing. Wow. Orbital eccentricity of 1.1922! The greatest we have ever seen — the keywords here being ‘ever seen’. Comet ISON, that crashed and burned on Thanksgiving Day 2013 had an eccentricity of 1.0000015.

But, here is the deal with eccentricity. Anything over 1.0 means that the object will eventually leave our Solar System. That we know. But, what we cannot tell as yet is WHEN A/2017 U1 got that highly eccentric orbit. We just do NOT know — as yet. And maybe never will.

To claim that it must have originated OUTSIDE of our Solar System — is speculative. We do NOT have enough evidence.

NASA/JPL’s official statement confirms that: “So far, everything indicates this is likely an interstellar object, but more data would help to confirm it.” Note the ‘likely‘ and the part about ‘more data … for confirmation‘. That is exactly MY POINT and what I am trying to impress.

The claim that its orbit was NOT influenced by a close encounter with a planet — typically one of the BIG ones — is speculative. It could have been majorly torqued around by Uranus or Neptune. We don’t know.

I have a druthers that this is a very old comet — a periodic one at that, which on its last trip out, maybe 400 years ago got too close to a gas giant and had its orbit turned ‘upside down’.

We don’t know.

All I am stressing is do NOT jump to conclusions.

We know so little about what has happened in OUR Solar System and what is happening right now.

But, it is exciting.


Has a ton of good information about comets.

Related Posts:
++++ Check Categories ‘Events’ &  ‘Astronomy’ for other related posts >>>>


by Anura Guruge