C/2015 ER61 ( PanSTARRS )

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Updated on March 5, 2020

Profile Discovery Date March 14, 2015 Magnitude 20.7 mag Discoverer Pan-STARRS 1 telescope (Haleakala) Pictures

Orbital Elements C/2015 ER61 (PANSTARRS) Epoch 2017 May 7.0 TT = JDT 2457880.5 T 2017 May 9.94399 TT MPCW q 1.0421312 (2000.0) P Q z +0.0026203 Peri. 68.19306 +0.54600849 +0.83284175 Node 235.22098 -0.80369295 +0.49009610 e 0.9972693 Incl. 6.34876 -0.23654254 +0.25725559 From 2750 observations 2015 Jan. 21-2018 Dec. 12, mean residual 0".6. Nongravitational parameters A1 = +0.68, A2 = -0.3015. C/2015 ER61-B (PANSTARRS) Epoch 2017 May 7.0 TT = JDT 2457880.5 T 2017 May 9.92133 TT MPCW q 1.0438546 (2000.0) P Q z +0.0012708 Peri. 68.28210 +0.54781018 +0.83165107 +/-0.0000572 Node 235.25620 -0.80263026 +0.49181009 e 0.9986735 Incl. 6.35035 -0.23598448 +0.25783586 From 52 observations 2017 June 11-Dec. 17, mean residual 1".1.

Finding Charts

Magnitudes Graph m1 = 3.0 + 5 log d + 15.0 log r [ ,-390] ( - 2016 Apr. 14) m1 = 6.5 + 5 log d + 10.0 log r [-390, 0] (2016 Apr. 14 - 2017 May 9) m1 = 6.5 + 5 log d + 15.0 log r [ 0, 150] (2017 May 9 - 2017 Oct. 6) m1 = 8.5 + 5 log d + 10.0 log r [ 150, ] (2017 Oct. 6 - )

The orbital elements are published on M.P.E.C. 2019-J142. The orbital elements of the fragment B are published on M.P.E.C. 2018-B155. The charts are made with StellaNavigator Ver.10 (AstroArts). The magnitudes graphs are made with Comet for Windows.