- A
minute of arc is π/10800 of a radian. A
second of arc,
arcsecond (
arcsec), or arc second,
denoted by the
symbol ″, is 1/60 of an arcminute, 1/3600...
- For example,
using this range, tan (
arcsec ( x ) ) = x 2 − 1 , {\displaystyle \tan(\operatorname {
arcsec}(x))={\sqrt {x^{2}-1}},}
whereas with the...
- |x|+C} ∫
arcsec ( a x ) d x = x
arcsec ( a x ) − 1 a
arcosh | a x | + C {\displaystyle \int \operatorname {
arcsec}(ax)\,dx=x\operatorname {
arcsec}(ax)-{\frac...
- 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...
- 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...
- 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...
- 556 d)
Precession of
perihelion 451.707549
arcsec / yr Precession of the ascending node 415.317659
arcsec / yr
Physical characteristics Mean diameter...
-
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...
- (9149.514 d)
Precession of
perihelion 874.6486
arcsec / yr Precession of the ascending node 972.3189
arcsec / yr
Physical characteristics Mean
diameter 40...
- star
positions more
accurately than previously, with a
precision of 15–35
arcsec.
Ottoman scholar Taqi al-Din
measured the
right ascension of the
stars at...
