AAVSO: American Association of Variable Star Observers

Proposal #238

Proposer (4848) George Silvis (gasilvis@gmail.com) obscode: SGEO
Assigned To(3663) Dirk Terrell
Date SubmittedNov. 27, 2021

I propose to chase the HD 80606 b exoplanet transit.
Exoplanet Watch is calling for observations as this will be an early target for the JWST.
It has a very eccentric orbit, so more data is needed to pin down the ephemerides.
Like the Kepler 167 e, this is a long transit (12hrs) so I'm aiming to catch 3rd and 4th contact.
NH2, TX and NM can all observe this. 3rd to 4th contact is about 67 minutes apart. So the plan is to start 90 min before 3rd and go to 90 min after 4th. NH2 will have only 50 min at the end before sunrise. UTC 0730 - 1130
Date is Dec 7, 2021 with observations starting in the next morning.
This is a bright target, mag 9, so need test shots in advance to set exposure.

Target RA (H.HH) Dec (D.DD) Magnitude Telescope Observation Frequency Expiration Date Proprietary Term
HD 80606 b 9.377103 50.60372 9.0 BSM_NH2 June 1, 2022 No


(4848) George Silvis — Nov. 30, 2021, 4:56 p.m.

I'll take care of prepping the plan for NH2, TX, NM
We should add it to our own scopes too!

(4848) George Silvis — Dec. 7, 2021, 3:36 p.m.

3 sets of BVI photometry collected and posted.
https://www.aavso.org/LCGv2/static.htm?DateFormat=Julian&RequestedBands=&Grid=true&view=api.delim&ident=HD 80606&tojd=2459556.142&delimiter=@@@
There were some transit observations back in 2005 and 2009; I'll look into getting them processed with Exotic.
Transit plan for NH, NM and TX set. Weather looks bad for NH. High hopes for NM and TX

(4848) George Silvis — Dec. 8, 2021, 5:32 p.m.

Alas, no joy.
NM never started
TX halted with some ACP fault in the early evening.
NH clouded out.
I'll drop these plans.

Comments on this proposal are closed.