2014 MU69 "Ultima Thule" flyby, For discussion of the encounter as it happens |
2014 MU69 "Ultima Thule" flyby, For discussion of the encounter as it happens |
Dec 13 2018, 10:12 PM
Post
#1
|
|
Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
It's only 10 days now until the "Core" phase of the 2014 MU69 flyby begins! I thought it was time for a new thread. Carry on discussing distant observations of other KBO worlds in the KBO encounters thread, and use this one for MU69 until after the departure phase is officially over on 8 January.
I'll be posting a "What to Expect" article next week. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
|
|
|
Jan 1 2019, 03:55 PM
Post
#2
|
|
Member Group: Members Posts: 290 Joined: 29-December 05 From: Ottawa, ON Member No.: 624 |
How bright is Ultima Thule to an observer with human eyes? (If we can get a common frame of reference and not the math.) As bright as the light from a full moon? Or, if I had a camera with ISO 100 at F4, what would be my shutter speed?
|
|
|
Jan 1 2019, 04:19 PM
Post
#3
|
|
Senior Member Group: Members Posts: 4247 Joined: 17-January 05 Member No.: 152 |
How bright is Ultima Thule to an observer with human eyes? (If we can get a common frame of reference and not the math.) As bright as the light from a full moon? Or, if I had a camera with ISO 100 at F4, what would be my shutter speed? It's around 43.4 AU from the sun, so sunlight at its surface would be close to 1/1900th as bright as at Earth. That corresponds to nearly 11 photographic stops fainter. So still quite a bit brighter than under a full moon at Earth, which would be around 18 or 19 stops fainter than full sunlight. |
|
|
Lo-Fi Version | Time is now: 30th May 2024 - 04:52 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |