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Special Notice #116: Superoutburst of the infrequently outbursting dwarf nova HO Del

August 4, 2008

As reported on VSNET (Kato, vsnet-alert 10399), the infrequently outbursting dwarf nova HO Del is in superoutburst for the first time since 2001.  Observations submitted to the AAVSO indicate the star is currently near m(vis) ~ 14.7 (Gary Poyner, JD 2454682.485), and likely went into outburst some time between JD 2454680.43 (Eddy Muyllaert, m(vis) < 14.4) and JD 2454681.49 (Hubert Hautecler, m(vis) = 14.2).

Kato et al (2003; PASJ 55, 989) showed that this star has several peculiarities among the SU UMa stars, including: peculiar superhump behavior; a low outburst amplitude relative to other long recurrence-time SU UMa stars; and a high X-ray luminosity.  Visual observations and instrumental time-series photometry of HO Del are encouraged.

HO Del is located at RA: 20 36 55.50 , Dec: +14 03 10.0 (J2000)

Charts and sequence photometry for HO Del are available via VSP:

http://www.aavso.org/observing/charts/vsp/index.html?pickname=HO%20Del

Please submit data to the AAVSO as "HO Del" (AUID 000-BCL-980).

This AAVSO Special Notice was prepared by Matthew Templeton.

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