Observing a Transit
Transit of Mercury Reminder
Tomorrow morning, November 11th, there is a transit of Mercury. For observers here in the islands the event will be in progress when the sun rises, only the last hour and a half of the even visible.
You can read a full post with all of the event details here.
This is the last transit of Mercury until 2032, you might want to get out to see this one.
Leonid Meteor Shower
The Leonids are one of the better known annual meteor showers. Some years see high Leonid activity, with amazing numbers of meteors. This shower has occasionally created true meteor storms. Unfortunately 2019 is not predicted to be one of those years, with very modest numbers expected.
Due to the gravitational influence of Jupiter, the Leonids are not expected to produce any exceptional showers for some decades. We are unlikely to see any repeats of the early 21st century storms anytime soon.
The shower will peak on November 17, with an expected ZHR of around 15 meteors per hour. The Leonids exhibit a broad peak allowing viewing for days before and after maximum. Moonlight is a bit of an issue with a waning gibbous Moon 5 days after full on the 17th.
A Wake-Up Quake
This one woke up everyone in the house, cats included.
While the eruption of 2018 had the island shaking, 2019 has had seemingly few felt earthquakes. I have gone several months without feeling a quake.
It was something of a surprise when the house rattled this morning just before 6am.
Deb asked me, “Was that a quake?”
“Yes.”
From the short, sharp rattle I guessed it was close… I was right, a magnitude 3.1 in North Kohala. It was also deep, a bit over 14 miles down. This was a classic settling quake as the weight of the island presses into the ocean crust.
On a Saturday morning we did not stay awake for long, cats included.
Update: The quake was later upgraded to a 3.4 after review by the USGS.
A Reminder on Safe Solar Viewing
With the transit of Mercury on Monday a reminder on how to view the Sun safely is in order. I have posted on this subject many times in the past and maintain a full post on the various techniques one can use to safely view the Sun.
Since Mercury is quite small you will want a bit of magnification to view the event properly. If you do not have a good solar filter for your telescope come to a local event where telescopes are available.
On Hawaiʻi island you can either go to the W. M. Keck Observatory HQ in Waimea or Subaru Observatory HQ in Hilo. Both observatories are hosting transit events at dawn Monday morning 11 Nov, 2019.
These events start at 6am with webcasts of the transit from other observatories further east, with the Sun rising far enough to see the transit from 7-8am.
Red Lights Under Stars
Were cultural sites destroyed when building observatories?
Another of the myths that plague this conversation. While not as commonly stated as some of the other myths discussed here, it has been persistent and seems to pop up regularly.
When the 12 existing facilities were built, not only were laws waived, heiau and ahus were bulldozed into trash heaps.
wailana in a comment on Ian Lind’s blog 14Sep2019
The myth is clearly an attempt to show that the state callously allowed the destruction of cultural properties in the past, thus showing that the state does not care for Hawaiian issues and would break its own laws.
Continue reading “Were cultural sites destroyed when building observatories?”Planets Over Hualālai
A Moonlit Night at Kaʻohe
It was Norman who started it.
An innocent email… Anyone interested in a star party this weekend?
Last weekend’s new Moon star party had been a bust, heavy clouds overhead were a disappointment to those of us waiting for a good dark night.
Given the positive response to Norman’s email there seems to be a few folks ready to go despite a bright Moon in the sky. With the weather looking good the Saturday afternoon email flurry showed that a few folks were going, thus I joined in.
As per Mauna Kea normal I drove through the clouds, heavy fog on Saddle Road just a mile from Kaʻohe made the trip seem hopeless. But as I neared the turn I suddenly found myself above the clouds, the bright Moon high over Hualalai.
Continue reading “A Moonlit Night at Kaʻohe”A Bit of Moonlight
A bit of moonlight, OK, more than a bit, still worth spending some time in the dark…
