[permalink] [id link]
ca: 61 Cygni
from
Wikipedia
Some Related Sentences
ca and 61
ca: 61
Gaius Plinius Caecilius Secundus, born Gaius Caecilius or Gaius Caecilius Cilo ( 61 AD – ca.
ca: 61 aC
Madurai finds mention in the works of Roman historians Pliny the Younger ( 61 – ca.
ca: Messier 61
ca :( 61 ) Danaë
1957 – 61 ), ICLeadership Letter ( 1961 – 66 ), International Leadership Letter ( ca.
Grumman RF-9J Cougar: See Grumman F-9 Cougar Serial Number: 144426 Markings: Light Photographic Reconnaissance Squadron 61 ( VFP-61 ), Miramar Naval Air Station, ca.
The C1 is powered by a 1. 0 L 3-cylinder engine, which has a fuel economy of 61. 4 mpg ( UK gallons EU method ; 4. 6 L / 100 km EU method ; ca 43. 4 mpg US with US method ).
The population was ca 61, 000 in 2006.
ca: Gai Octavi ( pretor 61 aC )
ca and Cygni
ca: 16 Cygni
61 and Cygni
He made the first measurement of stellar parallax: 0. 3 arcsec for the binary star 61 Cygni.
61 Cygni is a binary star divisible in large binoculars or a small amateur telescope.
61 Cygni is significant because Friedrich Wilhelm Bessel determined its parallax in 1838, the first star to have a known parallax.
Examples of well-known stars which are usually referred to by their Flamsteed numbers include 51 Pegasi ( see Extrasolar planet ), and 61 Cygni ( see Parallax ).
In 1838 Bessel won the race, announcing that 61 Cygni had a parallax of 0. 314 arcseconds ; which, given the diameter of the Earth's orbit, indicated that the star is 10. 4 ly away.
If the currently accepted figure of 11. 4 ly ( see 61 Cygni and discussion page ) is correct, Bessel's figure had an error of 8. 8 %.
As well as helping determine the parallax of 61 Cygni, Bessel's precise measurements allowed him to notice deviations in the motions of Sirius and Procyon, which he deduced must be caused by the gravitational attraction of unseen companions.
The first direct measurement of the distance to a star ( 61 Cygni at 11. 4 light-years ) was made in 1838 by Friedrich Bessel using the parallax technique.
Examples include 61 Cygni and 47 Ursae Majoris.
But Friedrich Bessel was skeptical about Struve's data, and, when Bessel published a parallax of 0. 314 ″ for the star system 61 Cygni, Struve revised his value for Vega's parallax to nearly double the original estimate.
Cygni, 61
cs: 61 Cygni
da: 61 Cygni
de: 61 Cygni
es: 61 Cygni
fr: 61 Cygni
id: 61 Cygni
it: 61 Cygni
nl: 61 Cygni
no: 61 Cygni
pl: 61 Cygni
pt: 61 Cygni
scn: 61 Cygni
sk: 61 Cygni
2.023 seconds.