Estimating comet magnitudes - brightness (long) ... to learn or practice the visual estimation of comet brightness.... below are designed to visually measure the m1 magnitude of a comet. ...comparison star, defocused to the same diameter as the comet. ... (sci.astro.amateur)
Re: Holmes history ... Kidd and Bartlett spotted the comet with the ... especially in the perihelion date. ... it was discovered during an apparent outburst in brightness.... but few made actual total magnitude estimates.... (uk.sci.astronomy)
Re: Comet 177P/Barnard Magnitude Descrepancies ...Comet 177P/Barnard is said to be an 8th magnitude object in Hercules ... That's because those programs rely solely on the magnitude parameters from the IAU. ... This comet is a relatively recent discovery and the IAU is waiting for more data before they compute accurate magnitude parameters.... For my Comet Chasing web site I use recent observations to compute magnitude parameters that will give better current estimates. ... (sci.astro.amateur)
Re: Deep Impact Report ...Oil Region Astronomy Society observatory site above Franklin, ... About magnitude 6 stars were visible and transparency ... fainter Messier objects you can see this comet".... They used a mix of 16 and 10" scopes.... (sci.astro.amateur)
Re: Any good memorable comets coming soon? Like Ikeya-Zhang Hale-Bopp ... Great Comet) were but pale representations of what nearly all of the ... excellent sky conditions and could trace the tail 70 degrees ... the "greatness" of comet to merely be its peak magnitude.... how high up in the sky the comet appears. ... (sci.astro.amateur)
