- arc is π/10800 of a radian. A
second of arc,
arcsecond (abbreviated as
arcsec), or arc second,
denoted by the
symbol ″, is a unit of
angular measurement...
- For example,
using this range, tan (
arcsec ( x ) ) = x 2 − 1 , {\displaystyle \tan(\operatorname {
arcsec}(x))={\sqrt {x^{2}-1}},}
whereas with the...
- tan (
arccsc x ) = 1 x 2 − 1 sin (
arcsec x ) = x 2 − 1 x cos (
arcsec x ) = 1 x tan (
arcsec x ) = x 2 − 1 sin (
arccot x ) = 1 1...
- 92
arcsec through the PA of 337.1°,
increasing to 5.49
arcsec through 345.3° in 2020. The
closest recent approach was in
February 2016, at 4.0
arcsec through...
- and its
position shifts due to its
proper motion annually by
about 1.24
arcsec in the
right ascension. In 2017, it was
announced that the object's m****...
- 8th-magnitude
primary with four
companions at
distances between 1.4 and 15.7
arcsec.
There has been no
appreciable change in this
quintuple system since the...
-
occurring at
adaptation luminances below approximately 10− 5 cd m−2 (25.08 mag
arcsec−2). This is a
limiting case of Ricco's law.
Researchers noticed as early...
- view of 164 by 164
arcsec (2.7 by 2.7 arcminute,
about 8.5% of the
diameter of the full moon as seen from Earth) with 0.04
arcsec pixels. This view is...
-
spatial resolution mode with a
field of view of 7.5x7.5
arcsec and a
spatial resolution of 0.042
arcsec at 750 nm. The main
scientific use of this mode is...
- the main galaxy. This is the
diameter as
measured through the 25.0 mag/
arcsec−2
isophote at the B-band. The
diffuse stellar halo of this
galaxy extends...
