October 31, 2017: Further to AAVSO Alert Notice 603, your positive observations of CI Aql, which will be used to determine whether the HST observation of CI Aql will take place, must be submitted to the AAVSO International Database by 14:45 UT (10:45 am EDT) on Wednesday, 2017 November 1. Without these positive ground-based observations reported by this time (and showing CI Aql not in outburst), the HST observation will not take place.
Dr. Edward Sion (Villanova University) informs us that the HST COS observation of the recurrent nova CI Aql has been scheduled for 2017 November 2 at 5:53 UT (i.e. 1:53 am EDT). This campaign was announced in AAVSO Alert Notice 599.
Observations (V preferred) are crucial from now through November 2; please report observations as soon as possible after making them. Observers are asked to continue nightly snapshots through November 30. Visual observations are welcome.
CI Aql (Nova Aql 1917) has had recurrent outbursts in 1941 and 2000, brightening to V~8.5. At minimum it is V~16-16.5 or fainter.
Coordinates (2000.0): R.A. 18 52 03.57 Dec. -01 28 39.4
Charts with a comparison star sequence for CI Aql may be created using the AAVSO Variable Star Plotter (VSP). Observers need to be aware that the field of view is complicated by some comparison stars appearing as close doubles.
Please submit observations to the AAVSO International Database using the name CI AQL.
This observing campaign is being followed on the AAVSO Campaigns and Observing Reports online forum at https://www.aavso.org/ci-aql-campaign-2017
This AAVSO Alert Notice was compiled by Elizabeth O. Waagen.
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