Transcript Sat14_Dunham_RegulusOccultations

Occultations of Regulus by Asteroids,
especially by 134-km (268) Adorea
on 2016 October 13
David Dunham
IOTA Meeting, Stillwater, Oklahoma
2016 July 30
Skyplane plot, Regulus occ’n by (166) Rhodope
Sites of my recordings of Regulus within the predicted path, Bermuda
+1
+2
Station 1 was about 5 km “inside”
the predicted northern limit.
Station 1 was a 120mm
“maxi” with Stellacam II
Integrating camera, to try to
record Regulus’ com-panIon,
but it took all its power just to
see the primary star through a
large cloud that passed over
the area. The clouds were
thinner at Station 2, which
also recorded no occultation
of Regulus by Erigone.
Another mighty mini at
Station 3 was clouded out at
the critical time, and another
one near the east end of the
island apparently was bumped
and didn’t record Regulus.
Cell Phone App to Time Occultations - http://iota.jhuapl.edu/AppAbsTiming.htm
Side Trip to Indonesia May 21-28
Rank 76 Occultation of Regulus
by (1669) Dagmar, 2015 May 24
The best place for this event was Saudi Arabia
The university could only
support the 6 mighty minis
brought by Paul Maley &
not the 6 that we had.
Near Jeddah, the star altitude was about 67 with Sun altitude about -14
Our 3 stations around Bengkulu, s.w. Sumatra
 Joan – star not seen
 Wira – Faint, but
Occultation recorded
 David – star recorded to 6
Sky dark, but altitude just under 5 there; the haze/clouds near the horizon only allowed Wira
Hadiputrawan to record the star (very faintly) to that altitude.  show actual locations; 3 telescope
symbols show locations that couldn’t be used. We thank Wira, from Lembang Observatory,
Bandung Univ., for travelling with us to Bengkulu and central Java, and also Yudhiakto
Pramudya and Eko Hadigunawan from Yogyakarta, for making all local arrangements.
May 24, occultation of 1.4-mag. Regulus by Dagmar
The occultation was detected at
Wira Hadiputrawan’s station but
the star was faint in the haze,
making it hard to quantify the
event times.
I thank Tony George and Brad
Timerson for the ROT-E and
Occult event analyses here and
for other occultations shown in
this presentation.
Dagmar Photos
Freddy with Joan’s setup and Joan’s Station Location
David and Wira at Wira’s site
Regulus is occulted again, by the
137km asteroid (268) Adorea on
2016 October 13, we plan to try it from
New Ireland, PNG. It will be an excuse
for us to return to Australia for a fortnight.
Path over Papua New Guinea
Path over New Ireland (Latangai Is.)
Daily air service from Port Moresby
Latangai Island is visited often
By Australian tourists, esp. surfers