Mars Opposition 2003 - august 19th, 09:54UT (01:54PDT)

NGC 6946 and NGC 6939

Image Details:

Telescope: Celestron 14 @ Approximately F44 (15,640mm)
Simulated View Above (On Right) - Generated by Calculated Sky:
  • Time: 
    2003 August 18 Monday, 1h 54m 00s
    JD: 2452869.8708333 TDT: 2452869.8715800 deltaT: 64.51 sec
    Apparent sideral time: Local: 22h 30m 00.662s Greenwich: 6h 39m 15.062s
    (All times in PDT, topocentric data for Seattle, Washington, United States)
  • Geocentric:
    True distance: 0.3784587 AU Light time: 0h 03m 08.9s
    Elongation from sun 165.73 degrees, west (visible in the morning)
    Equatorial Coordinates
    Apparent: R.A. 22h 47m 39.4s Dec. - 14d 53' 38.8"
    Ecliptical Coordinates
    Geometric: Lon. 337d 39' 50.0" Lat. - 6d 41' 20.0" (mean equinox, ecliptic of date)
    At zenith: Lon. - 117d 53' 56" Lat. - 14d 53' 39"
  • Topocentric:
    Airfree coordinates
    Altitude: 27.3656 deg Azimuth: 175.1986 deg
    Astrometric: R.A. 22h 47m 27.4s Dec. - 14d 55' 09.8" (J2000)
    Apparent: R.A. 22h 47m 39.5s Dec. - 14d 53' 59.4"
    Coordinates including refraction
    Altitude: 27.40 deg Azimuth: 175.20 deg
    Apparent: R.A. 22h 47m 39s Dec. - 14d 52' 07"
    Rises 21h 16.6m Transit 2h 11m 35.2s Sets 7h 06.4m 
  • Physical:
    Diameter: 24.73"
    Visual magnitude: -2.8 mag, Surface Brightness: 3.9 mag/arcsec^2
    Phase: 0.992, Phase Angle: 10.40 deg
    Sub-Earth Phi (pl.centric): -19.07 deg, Phi: -19.30 deg, Lambda: 188.1 deg
    Sub-Solar Phi (pl.centric): -22.36 deg, Phi: -22.62 deg, Lambda: 198.7 deg
    Illuminated fraction: 0.992
    PositionAngle of axis: 344.83 deg (from North to East)
    Position Angle of axis: 348.19 deg (from Zenith to East)
Mount: Astro-Physics 900GTO
Camera: ToUCam PCVC740K WebCam
Pixel Scale: Approximately 0.31 arcseconds per pixel
Location: ARGO, Oregon USA
Date: August 2003