THE 2MASS WIDE-FIELD T DWARF SEARCH. II. DISCOVERY OF
... for each object, dithered 1000 –2000 between exposures. The
sensitivity of these images was veriﬁed to be greater than
that of 2MASS, which has a J-band S/N = 10 completeness limit of 15.8 (Cutri et al. 2003),6 implying that any
stationary sources should have been recovered.
As in Burgasser et al. ( ...
... introduced in Grade One section but add the stories of Leo the Lion, Auriga the
Charioteer, Lepus the Hare, Draco, and the Pleiades. Look at these constellations using the Constellation Cylinder. Hand out arrow pointers and show their
locations. Look at the Starfield Cylinder and try to locate the s ...
the fixed stars
... Influence of the constellation: "It gives authority and a sober mind, sometimes making its natives judges or
arbitrators, but exposes to cruel and severe trials. By the Kabalists this constellation is associated with the Hebrew
letter Shin and the 22nd Tarot Trump, The Fool". (Robson).
Rising: Cephe ...
Understanding Variable Stars - Central Florida Astronomical Society
... 6.34 Variable red giants in the Large Magellanic Cloud, plotted in an
apparent K magnitude versus log(period) graph 209
6.35 The 1978--2004 light curve of Mira, based on visual measurements from
the AAVSO International Database 210
6.36 The spectra of four pulsating red giants 213
6.37 Radius versus ...
constellations - Richmond and Glen Allen Weather
... light pollution has become a real problem in observing the night sky.
• Typical city lighting prevents one from seeing stars that are of fourth, fifth, sixth
magnitude thus only a couple hundred stars will be seen.
• Under dark skies this number may be as high as 2,500 stars and many of these dim
... minutes to 24.8 arc minutes but increases in illumination from 27% to 48% during the course of the
month. As the sun rises in late May, Venus will reach an altitude of about 23 degrees for observers at 40
degrees north. The brightest planet is at the descending node on May 9th. On May 22nd, Venus li ...
365 days of SKYWATCHING
... than 20% obstructed you will probably do more harm than good in cleaning. And
there are so many little things that make observing fun, and fun to have in your
“kit.” But what do you really need?
The ver y best accessories I recommend are a comprehensive Moon
map, an easy to read sky char t, a watch, ...
Digital Universe Guide - American Museum of Natural History
... This is a multipurpose slider that, by default, comes up as the Slum Slider. The slum command sets
the scaling factor on the luminosity in Partiview. If you put your mouse on the value adjuster and move it
back and forth, you will notice the open clusters becoming bright and dim.
Below the Slider Me ...
Spectroscopic Atlas for Amateur Astronomers
... late spectral classes F, G, K, M. Due to the enormous line density it’s, particularly for
beginners, very difficult to make the link to the highly blended lines of their own, in most
cases lowly resolved profiles. Here at last it becomes clear, why spectral atlases need to be
created for specific de ...
Stellarium User Guide
... scipting facility is Stellarium’s version of a “Presentation”, a feature that may be used to
run an astronomical or other presentation for instruction or entertainment from within the
Stellarium program. The original Stratoscript was quite limited in what it could do so a
new Stellarium Scripting Sy ...
SkyWatcher2017.5 1.3 Mb - Boise Astronomical Society
... luminosity distance of DL = 749 mega-parsecs may be calculated from z. It is also one of the most luminous quasars
known, with an absolute magnitude of −26.7, meaning that if it were only as distant as Pollux it would appear nearly as
bright in the sky as the Sun. Since the sun's absolute magnitude ...
Colour-magnitude diagrams of the post
... can be considered a member. Goranskii determined a period of 0.5752 days, so that the cluster can be tentatively
classified as Oosterhoff type I.
Cluster parameters based on CCD photometry were derived for NGC 6256 and NGC 6717. They are both located
in the bulge, but are not metal-ri ...
Selected observation targets at a glance per constellation
... β Cam, Beta Camelopardalis, brightest in Cam. Double star, primary is a Ds.
yellow-hued Σ 385, supergiant @1000 ly from earth.
CS Camelopardalis, HIP 16228, 2nd brightest, a binary, blue-white Btype supergiant + companion @ 2.9”. Located in the reflection nebula vdB
14. Is an Alpha Cygni type variab ...
- National Optical Astronomy Observatory
... Movement of the Iron ions is restricted to the magnetic field lines from within the umbra
to the edge of the penumbra. This is supported by the data, which shows an initial
outward flow of the ions and then a downward flow near penumbra.
Because the nickel particles are not ionized, their velocities ...
NGC 6231: a young open cluster under X-rays
... • There is no spatial trends between the cTTs and the wTTs
• There is no very significant difference in their ages
• Star formation in NGC 6231 was most probably not a
• Formation scenario is compatible with the coalescence
model for massive star formation
to - NexStar Resource Site
... 9) Jupiter The king of our Solar System of planets. It is believed that with a little more mass, Jupiter
could have become a small star. What a different place our Earth would be with 2 Suns. Jupiter orbits
778,330,000 km (5.20 AU) from the Sun. Its mass is about 318 times that of the Earth and cont ...
... appears very similar to a lemon for which
it is named. The central star is a very hot
and bright Red Giant, and can be seen as
a red-orange hue.
IC 3568 lies in the constellation
Camelopardalis at a distance of about
Distance to VY Canis Majoris with VERA
... et al. (2007), and Hirota et al. (2008) proposed the maser
structure effect as being the main sources in their trigonometric parallax measurements for nearby star-forming regions
Orion KL, IRAS 162932422 in Oph East, and SVS 13
in NGC 1333, correspondingly. However, this effect does not
seem to b ...
April 2015 Astronomy Calendar by Dave Mitsky
... It reaches perihelion on April 19th.
Brilliant Venus is positioned high in the west at sunset. It sets about three hours after the Sun
in early April and three-and-one-half hours after sunset by month’s end. Venus is at perihelion on
April 18th. During the second week of April, the planet passes bet ...
Brightest Stars : Discovering the Universe Through the Sky`s Most
... star’s environment of season and constellations, of earth and the sky. Each
profile also offers the lore and legends connected with the star, for these are
a measure of what the human race as a whole has found interesting and individual about the star.
A key part of each profile, of course, is also ...
bode elert johann
... star that was not plotted. This first happened on 18 February 1780, when he saw “a star
not marked in my map tho’ visible to the naked eye full as well as μ Draconis … thus it
is surprising that it should have been overlooked in the Catalogue or map”.37 Evidently
he had also consulted the British Ca ...
Canis Major /ˌkeɪnɨs ˈmeɪdʒər/ is a constellation in the southern celestial hemisphere. In the second century, it was included in Ptolemy's 48 constellations, and is counted among the 88 modern constellations. Its name is Latin for ""greater dog"" in contrast to Canis Minor, the ""lesser dog""; both figures are commonly represented as following the constellation of Orion the hunter through the sky. The Milky Way passes through Canis Major and several open clusters lie within its borders, most notably M41.Canis Major contains Sirius, the brightest star in the night sky, known as the ""dog star"". It is bright because of its proximity to our Solar System. In contrast, the other bright stars of the constellation are stars of great distance and high luminosity. At magnitude 1.5, Epsilon Canis Majoris (Adhara) is the second brightest star of the constellation and the brightest source of extreme ultraviolet radiation in the night sky. Next in brightness are the yellow-white supergiant Delta (Wezen) at 1.8, the blue-white giant Beta (Mirzam) at 2.0, blue-white supergiants Eta (Aludra) at 2.4 and Omicron1 at 3.0, and white spectroscopic binary Zeta (Furud), also at 3.0. The red hypergiant VY Canis Majoris is one of the largest stars known, while the neutron star RX J0720.4-3125 has a radius of a mere 5 km.