GSH 045+14+031

Right Ascension (hh mm): 18 23
Declination (deg): 17.00
Reference Velocity (km/s): 31.03
Delta RA (hh mm): 00 08
Delta Dec (deg): 2.75
Delta V (km/s): 10.85
Mean Angular Diameter (deg): 2.40
Shape parameter: 0.66
Comments:

Kinematic Distances Information
    Kinematic Distance (kpc): 2.3
    Allowed Range (kpc): 1.8 to 2.8
    Kinematic Distance 2 (kpc): 10
    Allowed Range (kpc): 9.6 to 11
Inferred Shell Size
    Shell Diameter (pc): 96
    Allowed Range (pc): 75 to 120
    Shell Diameter 2 (pc): 420
    Allowed Range (pc): 400 to 460
Distance Notes:
       Not clear if shell is associated with local or Galactic gas. Kinematic distances could well be inaccurate.

Expansion Velocity Information
    Velocity of Front Wall V_f (km/s): 17
    Velocity of Back Wall V_b (km/s): 40
    Expansion Velocity (km/s): 12
        Front wall estimate may be possibly unrelated gas, or suffer from data quality issues.
        At least one spectral maximum is broad and/or peaks at a velocity close to the last shell-like velocity, so expansion velocity might be underestimated.
    Minimum 'Shell-like' velocity V₁ (km/s): 28
    Maximum 'Shell-like' velocity V₂ (km/s): 39
    Lower Limit on V_exp (km/s): 6 (from V₁ and V_b)