El
martes pudimos añadir otro cometa a la lista de los observados por la Sección Cometas de la Asociación Entrerriana
de Astronomía. El C/2014 Q1 Panstarrs
fue hasta hace pocos días un cometa visible sólo en el hemisferio norte, pero
luego de su paso por el perihelio el 6 de julio comenzó a ser visible en
nuestros cielos.
No
es un cometa fácil de observar, ya que aparece bajo en el horizonte al
anochecer y en poco más de 1 hora ya se encuentra debajo del horizonte. No es
fácil tampoco para los que trabajamos de tarde observar a las 7 de la tarde. A
eso le sumamos las luces de la ciudad, que son más perjudiciales para los
objetos más cercanos al horizonte. Y ni hablar de las nubes, que nos han
castigado en este 2015.
Pero
el martes 21 no trabajé de tarde y me pude subir al techo de mi casa antes de
que el cometa estuviera por debajo de los 20 grados (límite para una
observación con valor científico). Pude observarlo con binoculares de 10x50
pero sólo porque sabía donde debería estar y por la facilidad que brindaban
Venus y Júpiter, que formaban un triángulo cuyo tercer punto debería ser el
cometa. A pesar de tener una magnitud de 5.3, no es un objeto fácil de observar
desde la ciudad. Aquí les dejo una carta de Cartes du Ciel con la ubicación del
C/2014Q1.
C/2014Q1 2015 Jul. 21.90 UT: m1=5.3, Dia.=4’, DC=2, Cola:NO; 10X50B; Mét. Sidgwick, Cat. Tycho II; Alberto Anunziato (Paraná, Argentina).
Nuestro
reporte tuvo el valor extra de sumar una medición a una base de datos que no
tiene muchas observaciones, como se puede apreciar:
C/2014 Q1 (PANSTARRS)
2015 July 21.90 UT: m1=5.3, Dia.=4’, DC=2, Cola: no visible; 10×50 B; Alberto Anunziato (Paraná, Argentina)
2015 July 21.35 UT: m1=5.6, Dia.=3.5’, DC=6; 11×70 B; Chris Wyatt (Walcha, NSW, Australia) [Moonlight, Twilight, low altitude = 10.8°; Ion tail visible 1.7° in length in P.A. 120°; Broad dust tail visible 21’ in length in P.A. 036°. Central condensation enhances strongly in Swan Band filter, outer coma does not; Transparent outer coma with small stellar central condensation, white in colour]
2015 July 20.89 UT: m1=5.5, Dia.=3′, DC=6/; 10×50 B; Willian Souza (Sao Paulo, Brazil)
2015 July 20.34 UT: m1=5.4, Dia.=7’, DC=6; 11×70 B; Chris Wyatt (Walcha, NSW, Australia) [Moonlight, Twilight, low altitude = 10.1°; Ion tail visible 2.3° in length in P.A. 117°; Dust tail visible 16’ in length in P.A. 036°, superimposed over bright star of magnitude 5.2, 12’ away in P.A. 038°. Ion tail fans out to approximately 16’ in width at its extremity. Coma enhances strongly in Swan Band filter; transparent outer coma with small stellar central condensation. Through 25cm L @ x39 the coma appears aqua-blue in colour. Observation session ended by cloud interference]
2015 July 19.89 UT: m1=5.2, Dia.=3′, DC=7, Tail= 0.5 deg. in PA: 110 deg.; 15×70 B; Willian Souza (Sao Paulo, Brazil)
2015 July 19.363 UT: m1=5.4, Dia.=2’, DC=6; 10×50 B; Rob Kaufman (Bright, Victoria, Australia) [Fairly condensed; 2 deg of ion tail visible in about PA: 100; faint, short, wide dust tail visible in about PA: 30. 3-day-old waxing crescent Moon; twilight; comet altitude 7 degrees]
2015 July 18.353 UT: m1=5.2, Dia.=2’, DC=7; 10×50 B; Rob Kaufman (Bright, Victoria, Australia) [Condensed; 1.3 deg of ion tail visible in PA: 110; faint, short, wide dust tail visible in PA: 50. 2-day-old waxing crescent Moon less than 3-deg away; twilight; comet altitude 6 degrees]
2015 July 17.89 UT: m1=5.2, Dia.=3′, DC=7; 10×50 B; Willian Souza (Sao Paulo, Brazil) [fan shaped tail detected with averted vision, comet altitude ~8/9 deg.]
2015 Jan. 08.43 UT: m1=15.5: CCD, Dia.=&0.3′, Tail=&0.3′ in PA 95 deg; [T31] 0.50-m f/4.4 astrograph + CCD; A. Novichonok & T. Prystavski iTelescope observatory, Q62, remotely from Siding Spring, Australia) [in the evening twilight]
2014 Dec. 20.43 UT: m1=15.3 CCD, Dia.=0.4′, Tail=0.7′ in PA: 81 deg.; [T9] 0.32-m f/7.4 Ritchey-Chretien + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)
2014 Nov. 17.48 UT: m1=15.7: CCD, Dia.=0.3′; [T12]0.11m f/5.0 refractor + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, Q62, remotely from Siding Spring, Australia)
2014 Oct. 08.49 UT: m1=16.0 CCD Dia.=0.30′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62, remotely from Siding Spring, Australia) [images obtained during lunar eclipse to avoid moonlight interference]
2014 Sep. 16.76 UT: m1=16.3 CCD, Dia.=0.43′; [T12] 0.11m f/5.0 refractor + CCD; A. Novichonok, T. Prystavski, N. Teymurov (iTelescope observatory, Q62, remotely from Siding Spring, Australia)
2014 Aug. 31.62 UT: m1=16.2 CCD, Dia.=0.20′; 0.32-m f/7.4 Ritchey-Chretien + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, Q62; remotely from Siding Spring, Australia)
2015 July 21.90 UT: m1=5.3, Dia.=4’, DC=2, Cola: no visible; 10×50 B; Alberto Anunziato (Paraná, Argentina)
2015 July 21.35 UT: m1=5.6, Dia.=3.5’, DC=6; 11×70 B; Chris Wyatt (Walcha, NSW, Australia) [Moonlight, Twilight, low altitude = 10.8°; Ion tail visible 1.7° in length in P.A. 120°; Broad dust tail visible 21’ in length in P.A. 036°. Central condensation enhances strongly in Swan Band filter, outer coma does not; Transparent outer coma with small stellar central condensation, white in colour]
2015 July 20.89 UT: m1=5.5, Dia.=3′, DC=6/; 10×50 B; Willian Souza (Sao Paulo, Brazil)
2015 July 20.34 UT: m1=5.4, Dia.=7’, DC=6; 11×70 B; Chris Wyatt (Walcha, NSW, Australia) [Moonlight, Twilight, low altitude = 10.1°; Ion tail visible 2.3° in length in P.A. 117°; Dust tail visible 16’ in length in P.A. 036°, superimposed over bright star of magnitude 5.2, 12’ away in P.A. 038°. Ion tail fans out to approximately 16’ in width at its extremity. Coma enhances strongly in Swan Band filter; transparent outer coma with small stellar central condensation. Through 25cm L @ x39 the coma appears aqua-blue in colour. Observation session ended by cloud interference]
2015 July 19.89 UT: m1=5.2, Dia.=3′, DC=7, Tail= 0.5 deg. in PA: 110 deg.; 15×70 B; Willian Souza (Sao Paulo, Brazil)
2015 July 19.363 UT: m1=5.4, Dia.=2’, DC=6; 10×50 B; Rob Kaufman (Bright, Victoria, Australia) [Fairly condensed; 2 deg of ion tail visible in about PA: 100; faint, short, wide dust tail visible in about PA: 30. 3-day-old waxing crescent Moon; twilight; comet altitude 7 degrees]
2015 July 18.353 UT: m1=5.2, Dia.=2’, DC=7; 10×50 B; Rob Kaufman (Bright, Victoria, Australia) [Condensed; 1.3 deg of ion tail visible in PA: 110; faint, short, wide dust tail visible in PA: 50. 2-day-old waxing crescent Moon less than 3-deg away; twilight; comet altitude 6 degrees]
2015 July 17.89 UT: m1=5.2, Dia.=3′, DC=7; 10×50 B; Willian Souza (Sao Paulo, Brazil) [fan shaped tail detected with averted vision, comet altitude ~8/9 deg.]
2015 Jan. 08.43 UT: m1=15.5: CCD, Dia.=&0.3′, Tail=&0.3′ in PA 95 deg; [T31] 0.50-m f/4.4 astrograph + CCD; A. Novichonok & T. Prystavski iTelescope observatory, Q62, remotely from Siding Spring, Australia) [in the evening twilight]
2014 Dec. 20.43 UT: m1=15.3 CCD, Dia.=0.4′, Tail=0.7′ in PA: 81 deg.; [T9] 0.32-m f/7.4 Ritchey-Chretien + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)
2014 Nov. 17.48 UT: m1=15.7: CCD, Dia.=0.3′; [T12]0.11m f/5.0 refractor + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, Q62, remotely from Siding Spring, Australia)
2014 Oct. 08.49 UT: m1=16.0 CCD Dia.=0.30′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62, remotely from Siding Spring, Australia) [images obtained during lunar eclipse to avoid moonlight interference]
2014 Sep. 16.76 UT: m1=16.3 CCD, Dia.=0.43′; [T12] 0.11m f/5.0 refractor + CCD; A. Novichonok, T. Prystavski, N. Teymurov (iTelescope observatory, Q62, remotely from Siding Spring, Australia)
2014 Aug. 31.62 UT: m1=16.2 CCD, Dia.=0.20′; 0.32-m f/7.4 Ritchey-Chretien + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, Q62; remotely from Siding Spring, Australia)
Por
supuesto, no pudimos observar sus colas, como se observan en la siguiente
fotografía:
Crédito: Yuri Beletsky.
Fuente:
https://500px.com/ybeletsky https://rastreadoresdecometas.wordpress.com/2015/07/23/la-luna-y-c2014-q1-desde-el-cielo-chileno/
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