Plans for Tomorrow Night’s Erato Occultation

2014 July 13

32nd Annual IOTA Meeting

University of Maryland Observatory

College Park, MD

David W. Dunham

Wide-field Star Chart, Preston

Moon

target

Need moon shade on upper left side of telescope to prevent glare fromthe 88% sunlit Moon 13 away

North

Wide-field Star Chart, Iverson

Computed for MD-DC-VA region

2

Zenith

Moon(not shown)

North

Level 4 “Finder Scope” Star Chart, Iverson

Computed for MD-DC-VA region; FOV is for a mighty mini

Moon

Level 5 “ 80mm Midi” Star Chart, Iverson

Computed for MD-DC-VA region; FOV is for a mighty midi

DenebAlgedi

Level 6 “120mm Maxi” Star Chart, Iverson

Computed for MD-DC-VA region; FOV is for a mighty maxi

Nashira

Pre-Point Star List for the Erato Occ’n – DC area Occultation of TYC 5798-00119-1 by 62 Erato on 2014 July 15 Pre-point stars for the greater Washington, DC region Univ. J2000 Dec Time Time Star RA Dec Offset E. D. T. Offset Star h m s mag h m o ' ArcMin h m s h m s Designation 7 46 15 10.4 21 33.3 -14 53 star 3 46 15 am 0 0 0 7 35 13 8.3 21 22.3 -14 55 2.6 3 35 13 am 0 11 2 7 29 34 8.1 21 16.6 -14 49 -3.1 3 29 34 am 0 16 41 7 28 43 5.3 21 15.7 -15 10 17.8 3 28 43 am 0 17 32 29 Cap Note 1 7 18 39 8.0 21 5.6 -14 54 2.0 3 18 39 am 0 27 36 7 16 14 8.6 21 3.2 -14 50 -2.4 3 16 14 am 0 30 1 7 11 43 6.0 20 58.7 -14 29 -23.2 3 11 43 am 0 34 32 DV Aquarii Note 2 7 1 31 8.9 20 48.5 -14 54 2.3 3 1 31 am 0 44 44 6 52 21 5.2 20 39.3 -14 57 5.4 2 52 21 am 0 53 54 tau Cap Note 3 6 47 32 8.3 20 34.4 -14 53 0.9 2 47 32 am 0 58 43 6 40 11 7.9 20 27.1 -14 47 -4.6 2 40 11 am 1 6 4 6 34 9 3.1 20 21.0 -14 47 -4.7 2 34 9 am 1 12 6 Dabih Major Note 4 6 33 55 6.1 20 20.8 -14 47 -4.5 2 33 55 am 1 12 20 Dabih Minor Note 5Notes1. The star is SAO 164263 = ZC 3108.2. The star is SAO 164027 = ZC 3066.3. The star is SAO 163771 = ZC 3015.4. This brighter following component is sometimes called beta2 Cap, which follows the convention of numbering wide components of stars with Bayer Greek letter designations in their order of increasing right ascention, and this is what Jim Kaler specifies at http://stars.astro.illinois.edu/sow/dabih.html. But Wikipedia and some others (including the S&T/ESA Millenium Star Atlas) reverse the order, calling this brighter component beta1 Cap (Capricorni). The star is SAO 163481 = ZC 2969. This star is of personal interest since on 1957 October 30, shortly after I was given my first telescope, I observed a very close miss (star passing over the Leibnitz Mountains near the lunar south pole), sparking my interest in lunar grazing occultations and dynamical astronomy.5. This fainter component I believe should be beta1 Cap; see Note 1. The star is SAO 163471 = ZC 2968.

Wide-field Star Chart, Iverson, Shows 2 Cap

Computed for MD-DC-VA region

2

Zenith

Moon(not shown)

North

Level 4 “Finder Scope” Star Chart, Iverson

Computed for MD-DC-VA region; FOV is for a mighty mini

Level 5 “ 80mm Midi” Star Chart, Iverson

Computed for MD-DC-VA region; FOV is for a mighty midi

2

Dabih Major

Occult Watcher Stations for the Erato Occ’n – DC area

Occult Watcher Stations for the Erato Occ’n – NE USA

Occult Watcher Stations for the Erato Occ’n – SE USA

Occult Watcher Stations for the Erato Occ’n – List Distance (Occult) Prob. Cloudy Station info Submitted by City ------------------------------------------------------------------------------------------------------------------------------ 206.7 km 0.1% - == Right limit plus 3-Sigma == 155.8 km 2.3% - == Right limit plus 2-Sigma == 105.0 km 15.8% - == Right limit plus 1-Sigma == 91.6 km @323° 22.9% 100% (20) Blank T Mobile : video + gps Ted Blank Hampton, NH 80.9 km @323° 29.6% 90% (17) Blank T Mobile : video + gps Ted Blank Hampton, NH 69.9 km @321° 37.0% 90% (19) Blank T Mobile : video + gps Ted Blank Hampton, NH 59.9 km @327° 44.2% 90% (5) Creek Hill Obs : video + gps Ned Smith Trenton, GA 54.1 km 48.3% - === Right limit === 52.4 km @322° 49.5% 40% (2) Willow Oak Obs : video + gps Steve Conard Gamber, MD 51.5 km @320° 50.1% 90% (18) Blank T Home : video + gps Ted Blank Hampton, NH 50.1 km @323° 51.1% 40% (12) Conard S Mobile-Gamber : video + gps Steve Conard Gamber, MD 33.7 km @325° 61.4% 50% (16) Holenstein-Gravic : video + gps Bruce Holenstein Malvern, PA 31.3 km @328° 62.6% 10% (9) Iverson : video + gps Ernie Iverson Lufkin, TX 23.9 km @326° 66.1% 100% (3) Rolnick Observatory : video + gps Kevin Green Westport 20.9 km @328° 67.3% 60% (4) Scheck A Home : video + gps Andrew Scheck Scaggsville, MD 11.2 km @318° 70.1% 60% (11) UMD Observatory College Pk MD : video + gps David Dunham Greenbelt, MD 5.6 km @325° 71.0% 60% (10) Dunham D Home : video + gps David Dunham Greenbelt, MD 0.0 km 71.3% - ==== Centre Line ==== -6.9 km @130° 70.8% 50% (6) AACC : video + gps Chad E FCO, MD -15.5 km @149° 69.1% 80% (14) App State Dark Sky Obs : drift scan + other Daniel B. Caton Boone -19.0 km @143° 68.0% 50% (7) Winfree Obs : video + gps Hartzel Gillespie Lynchburg, VA -32.6 km @142° 62.0% 80% (1) FCO, MD : photoelectric + other Chad E FCO, MD -47.8 km @143° 52.7% 100% (13) CSMD : video + gps Chad E FCO, MD -54.1 km 48.3% - === Left limit === -105.0 km 15.8% - == Left limit plus 1-Sigma == -155.8 km 2.3% - == Left limit plus 2-Sigma == -206.7 km 0.1% - == Left limit plus 3-Sigma ==

NWS cloud-cover forecast

Canadian transparency forecast