1- May drop back down below +10 th magnitude.. The light curve for comet F3 NEOWISE. Adapted from Seiichi Yoshida’s Weekly Information About Bright Comets.. Observing comets brighter than +10 th. Astronomy news and interactive guides to the night sky from In-The-Sky.org
Although the comet fades to magnitude 2 by mid-month and magnitude 3 by month's end, its increasing elevation will help offset its diminishing light, making the latter half of July the prime time to enjoy the comet. For the best views of NEOWISE at both dawn and dusk find a location with a wide-open northern horizon such as a lake or field.
Neowise apparent magnitude chart. Comet C/2020 F3 (NEOWISE) latest observed magnitude is 5.0 and it is in the constellation of Coma. It should be barely visible to the naked eye, easily visible with the help of a small binocular. Comet C/2019 U6 (Lemmon) latest observed magnitude is 9.3 and it is in the constellation of Bootes. It should be visible with the help of a binocular. Comet C/2020 F3 (NEOWISE) is now putting on a show in the Northern sky. It is visible to the naked eye during early dawn hours and soon will be visible after sunset. After a few comets this spring. Between July 9th and 11th Comet NEOWISE was essentially only second magnitude (probably never having gotten brighter than +1.5 anyway), with just a scant few degrees of naked eye tail. Further more, it faded to no more than 3rd magnitude within just another 10 days, when the general public likely had its best opportunity to catch sight of it.
Comet NEOWISE was down to magnitude 5.0 or 5.5 by July 30th and fading by about a half-magnitude a day as expected. Finder chart through 0:00 August 5th UT, for the serious. Attached is the composite photo from 27th March from NASA. The red dots are the comet NEOWISE at 15 magnitude brightness, taken at 90 minutes intervals. – Krisztián Sárneczky. So basically, we should write either C/2020 F3 (NEOWISE), or comet NEOWISE. Useful links. Taking photos of stars and Milky Way (my article) "Absolute" magnitude is a measure of the true, intrinsic brightness of a star. It's defined as the apparent magnitude of an object if it were 32.616 light-years away. So while the sun has an apparent magnitude of -26, if we could see it at a distance of 32.616 light-years, it would shine at a very modest magnitude 4.7.
See Bob King’s Comet NEOWISE Delights at Dawn, with a chart of the comet’s path across easternmost Auriga, Lynx, and the feet of Ursa Major. Two supernovae for amateur telescopes have recently erupted in the western evening sky, both 12th magnitude and both in the Virgo Galaxy Cluster: in M85 and NGC 4457. NEOWISE survived its July 3rd perihelion in grand form, glowing around magnitude 0, bright enough for some amateurs to spot it the very same day. It has since faded to magnitude 1.5–2 but its beauty is undiminished. Beta The Interactive Night Sky Map simulates the sky above San Francisco on a date of your choice. Use it to locate a planet, the Moon, or the Sun and track their movements across the sky. The map also shows the phases of the Moon, and all solar and lunar eclipses.
The second characteristic is that each increase in integer represents an increase in brightness of 2.5 times. For example, an object of magnitude 5 is two and a half times the brightness of an object of magnitude 6. To help get a better understanding, see the chart below of common astronomical objects and their typical magnitude. It was fainter (my brightest estimate was +2.8 and the consensus was right around 3rd-magnitude), but made up for it with good viewing conditions. On balance, though, C/2020 F3 is still better. 153P/I-Z had a tail visible to the naked eye, but nowhere near as prominent as that of C/2020 F3. First magnitude stars are 100 times brighter than those of sixth magnitude.. This chart shows the location of Comet NEOWISE in the evening sky of early July 2020.. it is an interesting comet.
Comet Neowise passed closest to the Sun on July 3, 2020, and if it continues to survive perihelion 0.29 AU (43 million km) from the Sun, it is expected to remain visible to the naked eye in July. By June 10, 2020, as the comet was being lost to the glare of the Sun, it was apparent magnitude 7. 23 July NEOWISE is closest to the Earth, at 0.692 AU distant moving 4 degrees/day. 24 July NEOWISE passes near the +4.7 magnitude star Omega Ursae Majoris. 31 July NEOWISE enters Coma Berenices, where the Desired Son is hidden (Mary and Jesus at the age when the magi/wise found him, approx. 1 year and 3 month after his birth). C/2020 F3 (NEOWISE): An evening comet visible in binoculars This comet begins the month in Coma Berenices at magnitude 5.4. Look for a 4' coma. It should fade rapidly, moving into Virgo by month's end. FINDER CHART
F3 Neowise tracks below the Plough during the last half of July and this famous asterism can be put to good use in order to find it. By looking at the chart below, it’s possible to estimate where the comet will be in relation to the Plough, and to use sections of the pattern as a cosmic ruler. In telescopes Saturn will show its greatest apparent disk diameter of 18.5 arc-seconds – and its rings, which will be narrowing every year until the spring of 2025, will span 43 arc-seconds. (That’s about the same as Jupiter’s disk). A handful of Saturn’s moons are readily observable with backyard telescopes in a dark sky.