100P/Hartley (0100P)

Type: Periodic Perihelion date: 10 August 2022 Perihelion distance (q): 2.0 Aphelion distance (Q) : 4.8 Period (years): 6.4 Eccentricity (e): 0.41 Inclination (i): 25.6 JPL orbit diagram COBS lightcurve The comet, also known as Hartley 1, was discovered by Malcolm Hartley on June 13, 1985. On 29 April 2164 the comet will pass 0.487 AU (72,900,000 km) from Earth. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 04-Mar-16 17.87 0.15 17.4 0.2 13-Apr-16 17.22 0.02 16.7 0.2 27-May-16 16.99 0.08 16.1 0.2 07-Jun-16 17.49 0.04 17.0 0.2