# Time In Fractional Day As Used In Astronomy (e.g., MPC)– Excel Spreadsheet For Conversion (Both Ways).

by Anura Guruge

Click to ENLARGE.

What my Excel spreadsheet looks like. It is converting ‘.67810’ into a time format we can understand.

Time that comets are discovered are specified in this ‘fractional day’ format.

So, for example, time when C/2020 F3 (NEOWISE) was discovered per the ‘Minor Planet Center’ (MPC).

The .67810 used above is FROM this example.

Click to ENLARGE.

The Excel FORMULAS used in the Spreadsheet.

Click to ENLARGE.

I had trouble deciphering this time format. I had to seek help from a professional astronomer — Jeff Mangum. [Thank YOU, Jeff.]

I then dashed off a quick Excel for MY use. Then I decided I should create a version that I can SHARE.

Yes, of course, I could make it a download — but many would be leary of downloading it. So, intead, I am sharing the simple Excel formulas you will need to create your own. Yes, it can be made simpler. SMILE. I just wanted to show YOU the steps so you could see where I was going. SMILE. Plus, I am, at 67, not the hotshot programmer I was when I was in my 20s. SMILE.

Related posts:
Check Category ‘Astronomy.

by Anura Guruge

# Fragments Of Comet C/2019 Y4 (ATLAS) Start To Brighten, Per Ace Comet Hunter Terry Lovejoy.

by Anura Guruge

Click to ENLARGE.

The first set of imaging is by veteran comet hunter Terry Lovejoy — who has discovered 6 comets. He knows his stuff & his forte is astrophotography. His pictures show that one fragment has brightened noticeably. This could be because it is getting ever closer to the Sun and as such continuing to become more ‘active’ — i.e., ‘evaporate’ giving out gases.

The comet has definitely fragmented. Of that there is no doubt or debate. The ‘orange’ Hubble picture shows 4-fragments and JPL (2nd image) already lists 5.

As the orbital diagram shows the ‘comet’ — or to be more precise — the fragments are still a longways out and we are moving away.

The fragments may be bright, but they are SMALL. So naked-eye visibility is questionable.

Related posts:
Check Category ‘astronomy’.

by Anura Guruge

# Hubble Imaging Shows Comet C/2019 Y4 (ATLAS), Alas, Continuing To Fragment.

by Anura Guruge

Click to ENLARGE. April 20, 2020.

Click to ENLARGE. April 23, 2020.

#### C/2019 Y4 (ATLAS), as I told you last week, has started to fragment.

Some very clear & graphic imaging on C/2019 Y4 (ATLAS) from Hubble.

You can clearly see that it continues to break-up. It will NOT be naked-eye visible. SORRY.

Hopefully C/2020 F8 (SWAN) will step in. I am keeping an eye — quite literally.

Click to ENLARGE.

Related posts:
Check Category ‘astronomy’.

by Anura Guruge

# Uranus Was Discovered 236-Years Ago, By British Astronomer William Herschel.

by Anura Guruge

First planet discovered by a KNOWN person. The other 6 (including Earth) had been known about since antiquity.

First planet discovered with the aid of a telescope.

#### Click the image to ENLARGE and read here.

As with the discovery of Pluto, I talked about the Uranus discovery in my 2011 full-color, paperback & e-book (which is definitely worth looking at (even if I say so myself)).

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

by Anura Guruge

# Think – Today: Five hundred and thirty-eight (538)?

by Anura Guruge

#### Why will five hundred and thirty-eight (538) be the most important number in the United States next week?

Think first, then research, then THINK again. Think for the pleasure of thinking.

Yesterday’s ‘Think’360° in a circle. It has to do with the first (and most important) circle that our ancient ancestors, around 4,000 B.C. (or even earlier) had to contend with — and QUANTIFY. The circular orbit of the Sun (with the then belief that the Sun circled the Earth). 360° comes from the 365-days in a year. They had worked out, through very diligent observations of the seasons and stars (particularly the rising of the ‘Dog Star’ ‘Sirius’) that a year was around “360” days. I actually think they had nailed down the 365-days quite early on. BUT, in my opinion, they ROUNDED the 365 to the EASIER ‘360‘. 365 is not very divisible — and our early ancestors, thanks to sharing food, knew how to DIVIDE. Other than ‘1’ and ‘itself’, 365 only has two divisors: 5 & 73. You can’t divide it by 2, 4, 5 or 10. And then there is 360 which is hugely divisible: 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120 & 180. BINGO! Did you like that?

Related posts:
++++ Check Category ‘Think
’ >>>>

by Anura Guruge

# Think – Today: Why Is There 360 Degrees In A Circle?

by Anura Guruge

#### 360º in a circle (as opposed to say 100 or 200)? Why? Where did it come from?

Think first, then research, then THINK again. Think for the pleasure of thinking.

Yesterday’s ‘Think’: How many stars can you see naked eye? Lot depends on your own eyesight, where you are and light pollution. There used to be a general consensus that it was (on average) around 3,500 stars. Best case, it would never be over 6,000. But now we have a more definite answer thanks to Yale University professor, Dorrit Hoffleit. She counted all the stars up there with a ‘visibility index’ (so called ‘apparent magnitude’) of 1 to 6.5 — the normal range associated with naked eye visibility. She found a total of 9,096 across BOTH hemispheres, i.e., North & South. So that gives us (roughly) 4,548 a hemisphere. So, the original 3,500 wasn’t a bad guess and probably still holds true given eyesight variation AND increasing light pollution.

Related posts:
++++ Check Category ‘Think
’ >>>>

by Anura Guruge

# ‘Fancy That’ Google Doodle For The Inventor Of TV Antennas — Hidetsugu Yagi.

by Anura Guruge

#### Click to access the Google Doodle.

Permanent access, independent of date,
provided via the Google Doodle Archive.

Yet again very arbitrary reach. This should have been shown Worldwide.

>> Beatrice Tinsley.
>> Very first TOLPLESS Doodle.

**** Check Category ‘Google Doodle’ (sidebar) for other Doodles >>>>

by Anura Guruge

# Google Doodle For British-Born Evolution Of Galaxies Astronomer Beatrice Tinsley (75 Years).

by Anura Guruge

#### Click to access the Google Doodle.

Permanent access, independent of date,
provided via the Google Doodle Archive.

Click to ENLARGE and read here. Use above links to access original. Very STRANGE ‘reach’ — again. No U.K. (though British born) and NOT in the U.S. though she worked/lived here!

Click to ENLARGE and read here. From Wikipedia: en.wikipedia.org/wiki/Beatrice_Tinsley

>> Very first TOLPLESS Doodle.
>> Indian Republic Day 2016.

**** Check Category ‘Google Doodle’ (sidebar) for other Doodles >>>>

by Anura Guruge

# Explosions Notwithstanding, Comet ISON, C/2012 S1, Will NOT Impact Earth, It Is NOT Nibiru.

...
..
.
by

A recent report that there was a supposed ‘explosion’ on ISON, C/2012 S1, and then the report yesterday of C/2012 X1’s explosion, has again reignited the year-old mumbo-jumbo that ISON is Nibiru and it is set to destroy the Earth.

This is rank garbage.

The supposed ‘explosion’ on ISON was just a normal gas OUTBURST when a new vent opens up on the surface as it gets closer to the Sun. That is par for the course. Think ice-cube in microwave. It was NOT hit by a large asteroid — which, yes, could have changed its course. ISON’s course has not changed.

On November 2, 2013 as it first crosses the Earth’s orbital path it is going to be a long, long, long, long, long … long way away from Earth — like 1.2 TIMES the Earth-Sun distance! Yes, it is going to be 1.203 AU out. That is 111.8 MILLION MILES (and even further out in stupid Kms). So, no danger there.

Then we have perihelion on Thanksgiving Day.

5 scenarios of what can happen then.

It is after that, hopefully on Boxing Day, that we will have the closest fly-by.

But IF it survives perihelion ‘intact’ it will breeze by 39.9 MILLION MILES AWAY.

Check this.

Click to ENLARGE. From ‘ISON for Kids’.