Forum der Vereinigung der Sternfreunde

Orbital elements:
    P/2021 N4                                                                   
Epoch 2021 Aug. 14.0 TT = JDT 2459440.5                                         
T 2021 Aug. 30.63190 TT                                 Rudenko                 
q   2.3009643            (2000.0)            P               Q                  
n   0.18615847     Peri.  105.29919     +0.95070554     +0.27135550             
a   3.0377184      Node   239.16339     -0.30584523     +0.90038886             
e   0.2425353      Incl.   10.06667     +0.05116319     +0.34009718             
P   5.29                                                                        
From 27 observations 2016 Oct. 25-2021 Aug. 14, mean residual 0".3.             
                                                                       

Zirka 21 mag im August 2021.

https://minorplanetcenter.net/mpec/K21/K21Q96.html

_________________
Uwe Pilz, Fachgruppen Kometen und Astrophysik/Algorithmen.
Oft benutzte Instrumente: Fujinon 16x70 FMT-SX-2, TMB Apo 105/650, Skywatcher Evostar 120/900 ED, Ninja Dobson 320/1440, Smartscope Dwarf-3

COMET P/2016 U2 = P/2021 N4 (PANSTARRS)
R. Weryk, Department of Physics and Astronomy, University of Western
Ontario, has identified images of comet P/2014 N4 (cf. CBET 5019) in exposures
obtained in 2016 with the Pan-STARRS1 1.8-m Ritchey-Chretien reflector at
Haleakala (astrometry tabulated below).

2016 UT R.A. (2000) Decl. Mag.
Oct. 25.47090 1 55 03.16 +19 46 44.8 20.9
25.48345 1 55 02.55 +19 46 38.0 20.7
25.49596 1 55 01.95 +19 46 31.3 20.7
Nov. 15.41168 1 41 37.20 +16 38 07.1 21.4
15.42539 1 41 36.80 +16 38 00.1 21.4
15.45287 1 41 36.01 +16 37 45.9 21.6



Epoch = 2021 Aug. 14.0 TT
T = 2021 Aug. 30.63234 TT Peri. = 105.29934
e = 0.2425354 Node = 239.16338 2000.0
q = 2.3009640 AU Incl. = 10.06668
a = 3.0377183 AU n = 0.18615848 P = 5.29 years


2021 September 19 (CBET 5041)

_________________
Michael Möller (MMI)

auch cbet 5041

_________________
Uwe Pilz, Fachgruppen Kometen und Astrophysik/Algorithmen.
Oft benutzte Instrumente: Fujinon 16x70 FMT-SX-2, TMB Apo 105/650, Skywatcher Evostar 120/900 ED, Ninja Dobson 320/1440, Smartscope Dwarf-3