171P/Spahr

171P/Spahr
Discovery
Discovered byTimothy B. Spahr
Discovery dateNovember 16, 1998
Designations
P/1998 W1
P/2005 R3
Orbital characteristics
Epoch2012-Feb-03
(JD 2455960.5)
Aphelion5.342 AU
Perihelion1.764 AU
Semi-major axis3.553 AU
Eccentricity0.5033
Orbital period6.70 a
Inclination21.94°
Last perihelionJanuary 13, 2019[1]
April 30, 2012[1]
September 3, 2005
Next perihelion2025-Sep-25[2]

171P/Spahr is a periodic comet in the Solar System. 171P/Spahr was recovered on 20–24 October 2011 at apparent magnitude 20.6 using the 2.0-metre (79 in) Faulkes Telescope South.[3] 171P/Spahr is peaked at about magnitude 18 in 2012.[4]

During the 1999 passage the comet brightened to about magnitude 13.5.[5]

At perihelion on January 13, 2019 when the comet was 1AU from Earth, the 3-sigma uncertainty in the comet's Earth distance was ±500 km.

  1. ^ a b Cite error: The named reference NK2169 was invoked but never defined (see the help page).
  2. ^ MPC
  3. ^ Cite error: The named reference Remanzacco was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Yoshida-171p was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference kronk was invoked but never defined (see the help page).