53P/Van Biesbroeck

53P/Van Biesbroeck
Reported observations:
2016 Oct. 31.76 UT: m1=15.0 Dia.=0.7′, DC=3 ... 60-cm L (305x)... Sandor Szabo (Sopron, Hungary)
2016 Oct. 25.42 UT: m1=14.4, Dia.=0.6’, DC=1 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma getting very difficult to see. Diffuse round patch. Close to 14th magnitude star]
2016 Oct. 24.42 UT: m1=14.3, Dia.=0.9’, DC=1 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight hint of central brightening]
2016 Oct. 23.42 UT: m1=14.3, Dia.=1’, DC=1 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse coma, weakly condensed, no Tail]
2016 Sep. 29.81 UT: m1=14.3, Dia.=0.5’, DC=3 ... 60-cm L (305x)... Sandor Szabo (Sopron, Hungary)
2016 Sep. 28.43 UT: m1=14.0, Dia=1’, DC=2 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma small and diffuse, no Tail. Sky slightly hazy from smoke]
2016 Sep. 26.42 UT: m1=13.5, Dia.=1’, DC=3 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse and difficult, no Tail]
2016 Sep. 01.51 UT: m1=14.0, Dia.=0.6′, DC=2 ... 40.0-cm L f/4.5 (257x)... Seiichi Yoshida (Gunma, Japan)
2016 Aug. 30.90 UT: m1=13.9, Dia.=1.0′, DC=1 ... 35-cm L (178x)... Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 29.96 UT: m1=13.8, Dia.=0.5′, DC=3 ... 35-cm L (178x)... Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 28.91 UT: m1=13.4, Dia.=0.7′, DC=4 ... 30-cm L f/5 (167x)... Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 Aug. 27.95 UT: m1=13.8, Dia.=0.7′, DC=1/ ... 35-cm L (178x)... Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 26.95 UT: m1=13.5, Dia.=0.6′, DC=2 ... 35-cm L (178x)... Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 26.89 UT: m1=13.1, Dia.=0.64′, DC=5 ... 30-cm L f/5 (167x)... Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 Aug. 25.92 UT: m1=13.2, Dia.=0.7′, DC=2/ ... 35-cm L (178x)... Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 25.89 UT: m1=13.2, Dia.=0.7′, DC=1 ... 60-cm L (244x)... Sandor Szabo (Hungary)
2016 Aug. 12.72 UT: m1=13.3, Dia.=1.4’, DC=6 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with small faint stellar central condensation, opaque inner coma. Easily visible at x83]
2016 Aug. 08.53 UT: m1=13.4, Dia.=1.4’, DC=6 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, brightens to an opaque inner coma with a faint stellar central condensation, m2= 14.8 approximately. Does not enhance in Swan Band filter, no Tail visible. Coma visible at x39 but best observed at x83 due to faint stars nearby]
2016 Aug. 03.12 UT: m1=12.5, Dia.=1′, DC=4 ... 22-cm L (160x)... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 31.42 UT: m1=13.5, Dia.=1’, DC=4 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed centre, sometimes appears faintly stellar in good seeing. No Tail]
2016 July 29.49 UT: m1=13.4, Dia.=0.6’, DC=3 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse with slight brightening to centre]
2016 July 28.44 UT: m1=13.5, Dia.=0.7’, DC=2/ ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slightly brighter in centre]
2016 July 25.41 UT: m1=13.6, Dia.=1’, DC=2/ ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma small, diffuse with slight brightening to centre, no Tail]
2016 July 03.02 UT: m1=12.9, Dia.=0.9′, DC=3 ... 20-cm SCT (133x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS]
2016 July 02.51 UT: m1=13.4, Dia.=0.8’, DC=3 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma small and opaque with slightly brighter centre. No Tail. Faintly visible at x39, does not enhance in Swan band filter]
2016 June 28.53 UT: m1=13.5, Dia.=0.8’, DC=3 ... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter... Outer coma faint and brightening slightly to weakly condensed inner coma. No Tail. Sky hazy although transparent, ground fog present]
2016 June 08.74 UT: m1=14.4, Dia.=0.6’, DC=3 ... 25-cm L f:5 (166x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse and weakly condensed... difficult to see except in periods of good seeing where it is easily viewed. No Tail]
2016 May  08.07 UT: m1=14.3, Dia.=0.5′, DC=3 ... 60.0-cm L (300x)... Sandor Szabo (Hakos, Namibia)
2016 May  03.09 UT: m1=15.4, Dia.=0.3′, DC=2 ... 40.0-cm L (225x)... Sandor Szabo (Hakos, Namibia)
2015 May  25.92 UT: m1=16.8 CCD + R filter, Dia.=18″, DC=4, Tail= 1.2′ in PA: 76 deg ... 70-cm f/4 L + CCD... Alexander Baransky (Kyiv comet station MPC 585, Ukraine) [Tail=curved CCW.]
2015 May  05.99 UT: m1=16.0 CCD + R filter,  Dia.=17″, DC=5 ... 70-cm f/4 L + CCD... Alexander Baransky (Kyiv comet station MPC 585, Ukraine) [Fan-like coma]
2015 Apr. 21.97 UT: m1=16.5 CCD + R filter, Dia.=10″, DC=5 ... 70-cm f/4 L + CCD... Alexander Baransky (Kyiv comet station MPC 585, Ukraine)
2015 Apr. 11.02 UT: m1=16.8 CCD + R filter, Dia.=9″, DC=7, Tail= 1′ in PA: 336 deg ... 70-cm f/4 L + CCD... Alexander Baransky (Kyiv comet station MPC 585, Ukraine)
2015 Mar. 17.11 UT: m1=17.2 CCD + R filter, Dia.=9″, DC=6, Tail= 15″ in PA: 335-83 deg ... 70-cm f/4 L + CCD... Alexander Baransky (Kyiv comet station MPC 585, Ukraine)
2015 Feb. 18.07 UT: m1=17.9 CCD + R filter, Dia.=9″, DC=5 ... 70-cm f/4 L + CCD... Alexander Baransky (Kyiv comet station MPC 585, Ukraine)
2003 July 17.20 UT: m1=14.4 CCD, Dia.=16", DC=6/9 ... 0.41-m SCT/CCD ... P. Clay Sherrod (ASO - Petit Jean H41) [Fairly distinct tail steady for first time in PA 93 deg., despite very low altitude of comet; not as compressed as prior dates, minor brightening]
2003 June 24.90 UT: m1=13.5:, Dia.=0.5', DC=4 ... 20.3-cm L (63x) ... Piotr Guzik (Krosno, Poland) [Excellent conditions, NELM~6.7]
2003 June 21.98 UT: m1=13.5, Dia.=1.5', DC=3 ... 45-cm L (100x) ... J. Carvajal (Avila, Spain)
2003 June 21.98 UT: m1=13.4, Dia.=1', DC=4 ... 45-cm L (100x) ... J. M. San Juan (Avila, Spain)
2003 June 09.24 UT: m1=14.7 CCD, Dia.=19", DC=7/9 ... 0.41-m SCT/CCD ... P. Clay Sherrod (ASO - Petit Jean Mountain, H41) [Still very concentrated and circular; no evidence of tail noted previous night, but moonlight interferes]
2003 June 07.99 UT: m1=13.8:, Dia.=0.5', DC=4 ... 20.3-cm L (63x) ... Piotr Guzik (Krosno, Poland) [Excellent conditions, NELM~6.9]
2003 June 04.25 UT: m1=14.4 CCD, Dia.=18", DC=7/9 ... 0.41-m SCT/CCD ... P. Clay Sherrod (ASO - Petit Jean H41) [In appulse with two stars and very difficult to determine overall size and m1; very concentrated but more differentiation apparent tonight between coma and nucleus]
2003 June 03.92 UT: m1=13.8, Dia.=0.5', DC=4 ... 20.3-cm L (63x) ... Piotr Guzik (Krosno, Poland) [Excellent conditions, faintest stars visible to the telescope were 14.7, NELM~7.0]
2003 May  30.92 UT: m1=[13.2, Dia.=1' ... 20.3-cm L (63x) ... Piotr Guzik (Krosno, Poland)
2003 May  25.57 UT: m1=14.3:, Dia.=0.5', DC=5 ... 28-cm T 310x ... Michael Mattiazzo (Wallaroo, South Australia) [HS comparisons]
2003 May  23.28 UT: m1=14.7 CCD, Dia.=18", DC=7/9 ... 0.41-m SCT/CCD ... P. Clay Sherrod (ASO - Petit Jean Mountain, H41) [A fine object, with a bright central conds. embedded within a fairly large vague coma; slight tail, short, in PA 191]
2003 May  11.33 UT: m1=15.1 CCD, Dia.=0.2', DC=5/9 ... 0.41-m SCT/CCD ... P. Clay Sherrod (ASO - Petit Jean Mountain, H41) [Coma appears slightly irregular (perimeter) with some degree of concentration toward middle]
2003 May  02.30 UT: m1=14.7 CCD, Dia.=18", DC=7/9 ... 0.41-m SCT/CCD ... P. Clay Sherrod (ASO - Petit Jean Mountain, H41) [Coma perimeter appears slightly irregular with a strong condensation toward center; no tail]
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