Tag Archives: eccentricity

3 New Comets Discovered In August 2020; 2 Periodics & Other With An Extremely High Eccentricity.

by Anura Guruge

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These discoveries have just been confirmed — within the week, i.e., August 2, 2020.

Two, i.e., P/2020 O1 & P/2020 O3, are periodicals — in that they have orbital periods that are less than 200-years. Actually both of these have comparatively short orbital periods, i.e., 4.3 & 10 years. That also means that they don’t go very far from the Sun (or us). Also interesting that both these were discovered right after their most recent perihelions. Their next ones are way out.

Not so with the non-periodic, i.e., C/2020 O2. It is due to perihelion a year from now. Its orbital period has yet to be established. But, note its eccentricity. It is over ‘1’. Anything 1 or over has HIGH eccentricity by definition.

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by Anura Guruge


The ‘Eccentricity’ Of New Comet C/2020 F8 (SWAN) Is Very High, But This Could Change With More Observations.

by Anura Guruge

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It has NOT been deemed Interstellar — i.e., originating from outside our Solar System.

But, the eccentricity — pretty damn close to ‘1.0’ — and the CRAZY 10 MILLION YEAR orbital period suggest that this is a strange comet — for NOW.

But, we only have 90 observations of it yet. Basically, early days.

With more observations the orbital path will get REFINED and will most likely change.

Just wanted to make sure you got that.

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by Anura Guruge

American Astronomer Maria Mitchell’s 195th Birthday Google Doodle.

Anura Guruge, June 8, 2013.

Anura Guruge

MariacometGDthLast Google Doodle post:
>> Rosalind Franklin’s 93rd Birthday … — July 15, 2013.
≡ ≡ ≡ ≡ Check CATEGORY ‘Google Doodle’ for other posts —>>> (side bar)


Click on images to access.

Link will be updated after August 1, 2013
for access from the Google Doodle Archive.

Click for Wikipedia entry.

Click for Wikipedia entry.

Here is the Wikipedia entry.

The official Minor Planet Center (MPC) data for the comet she discovered: C/1847 T1.

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So it perihelioned, i.e., went around the Sun (at its closest) on November 14, 1847, three weeks after it was discovered on October 26, 1847. Not like today when we can spot comets 18 months away.

Note the eccentricity. Just over 1! That is significant. That means that it was on an escape orbital path — meaning that it could leave the solar system. But, we now know that eccentricity can fall, i.e., drop below ‘1’, once a comet like this gets further out into space, i.e., beyond Jupiter. Check out my comet books.

She is NOT the first woman to discover a comet. This is from my ‘Comets: 101 Facts & Trivia‘ book.

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