Coordination System: 座標系統

• RA: Right Ascension (赤經)
• DEC: Declination (赤緯)
• Delta: Geocentric distance (地心距離)
• r: Heliocentric distance (日心距離)
• AU: Astronomical Unit (天文單位) (= 149597870 km)
• Elg: Elongation (離角)
• Az: Azimuth (方位角) (South = 0 degree)
• Alt: Altitude (仰角)
• Mv: Visual magnitude (視星等)

Orbital Elements: 軌道要素

• T: time of perihelion passage (通過近日點時刻)
• a: semi-major axis (半長軸)
• q: perihelion distance (近日點距離)
• e: eccentricity (離心率)
• i: inclination (軌道面與黃道面傾斜角)
• node: longitude of ascending node (昇交點黃經)
• w: argument of perihelion (近日點引數)