37P/Forbes

37P/Forbes
Reported observations:
2018 Sep. 19.06 UT: m=11.0, Dia.=7', DC=1, ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain; Alt. 1720 m, 42º 55' N, 5º 50' W) [Faint tail difficult to separate from the coma. The bright estimate (11.0) is related to the 7' observed width of the coma and tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2018 Sep. 17.75 UT: m1=[13.1, negative, ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 16.74 UT: m1=[13.5, negative, ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 09.97 UT: m=11.0, Dia.=6', DC=1, ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain; Alt. 1720 m, 42º 55' N, 5º 50' W) [Faint tail difficult to separate from the coma. The bright estimate (11.0) is related to the 6' observed width of the coma and tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2018 Aug. 20.10 UT: m1=10.5, Dia.=6', DC=1, ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Observation made under better conditions, providing a wider diameter and brighter magnitude estimate in comparison with my previous Aug. 15 observation. Faint tail difficult to separate from the coma. The bright estimate (10.5) is related to the 6' observed width of the coma and tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2018 Aug. 17.03 UT: m1=17.1 CCD, Dia.=0.18', DC=7, ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory С36, Baran', Belarus)
2018 Aug. 15.73 UT: m1=13.7, Dia.=1’, DC=2/, ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult; diffuse with slightly brighter but weakly condensed centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 15.01 UT: m1=11.2, Dia.=3', DC=0/, ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 Aug. 12.03 UT: m1=14.0, Dia.=0.8', DC=d2, ... 0.60-m f/4 L(305x) ... Gabor Santa (Tarján, Hungary) [diffuse, h=47 deg.] 
2018 Aug. 10.97 UT: m1=14.2 CCD, Dia.=0.67', DC=6/, ... 0.20-m f/4 Schmidt-Newton + CCD ... Sergey Shurpakov (Observatory A98, Baran', Belarus)
2018 Aug. 10.04 UT: m1=11.2, Dia.=3.5', DC=0/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Very diffuse. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2; 21.6 at zenith]
2018 Aug. 08.74 UT: m1=13.5, Dia.=1.4’, DC=2/, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 06.62 UT: m1=13.5, Dia.=2’, DC=2/, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, very diffuse, weakly condensed. Visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 23.77 UT: m1=13.5, Dia.=1.5’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0. Method= S. Cat= AQ]
2018 July 22.12 UT: m1=10.5, Dia.=5', DC=1/, ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Quintanilla de los Oteros, Leon, Spain. Alt. 860 m, 42º 19' N, 5º 24' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2018 July 18.77 UT: m1=13.2, Dia.=1.2’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Slight interference from star at edge of coma. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 18.09 UT: m1=11.0, Dia.=4.0', DC=1/, ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3] 
2018 July 16.74 UT: m1=13.0, Dia.=1.3’, DC=2/, ... 25-cm L f:5 (83x) .... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 14.01 UT: m1=13.8, Dia.=1.3', DC=2, ... 60-cm L (244x) ... Sandor Szabo (Sopron, Hungary)
2018 July 13.74 UT: m1=12.9, Dia.=1.6’, DC=3/, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to a weakly condensed opaque centre. Close to faint star. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 13.68 UT: m1=13.5, Dia.=1.0', DC=3, ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 11.75 UT: m1=13.5, Dia.=1.3’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 10.07 UT: m1=10.6, Dia.=4', DC=2, ... 20-cm SCT (77x) ... Juan Jose Gonzalez ( lto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 June 23.76 UT: m1=12.1, Dia.=1.5’, DC=3/, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Opaque centre, moderately condensed, slight interference from mag 13.7 star in Southern edge of coma. not enhance in Swan Band filter. Visible at x39 but very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 22.77 UT: m1=13.3, Dia.=1.7’, DC=5/, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Hint of coma extension to the West, slight interference from mag 13.4 star nearby. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 19.11 UT: m1=10.3, Dia.=5', DC=2/, ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.9. Beginning of astronomical twilight. Altitude: 26 deg.].
2018 June 17.33 UT: m1=12.7:, Dia.=1', DC=4, ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [comet near a star wuth m1: 12.82]
2018 June 13.76 UT: m1=13.0, Dia.=2’, DC=3/4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, inner coma opaque and sometimes appears faintly stellar. Faintly visible at x39 and with Neptune in the field. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 13.11 UT: m1=10.5, Dia.=4', DC=2/, ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain; Alt. 1190 m, 42º 47' N, 6º 00' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0. Beginning of astronomical twilight. Altitude: 21 deg. Mountain location, very clear sky]
2018 June 12.74 UT: m1=12.7, Dia.=1.7’, DC=4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, centre small and slightly more condensed. Faint extension of coma to the SW approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 11.70 UT: m1=12.5, Dia.=1.7’, DC=5/6, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with opaque centre, hint of tail to NW approximately. Central condensation sometimes appears stellar in periods of good seeing. Faintly visible at x39. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  25.73 UT: m1=12.7, Dia.=1.7’, DC=4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2018 May  22.73 UT: m1=12.6, Dia.=1.5’, DC=6, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, faint stellar central condensation, coma extends to WSW approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  21.73 UT: m1=12.5, Dia.=1.7’, DC=6, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faintly stellar, very diffuse. Faint elongation to the WSW approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  21.14 UT: m1=10.7, Dia.=4', DC=2/, ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. Observation made under better conditions, from a higher mountain location, providing a wider coma diameter and brighter m1 estimate in comparison with my previous May 16.12 UT observation. Astronomical twilight. Altitude: 16 deg. SQM: 20.9]
2018 May  19.74 UT: m1=12.5, Dia.=1.6’, DC=6, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse with faint stellar central condensation. Outer coma appears elongated to the WSW approximately. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  18.74 UT: m1=12.4, Dia.=1.5’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Sometimes appears to have a faint stellar centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 May  16.12 UT: m1=11.5, Dia.=1.5', DC=2/, ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain; Alt. 1190 m, 42º 47' N, 6º 00' W) [Sidgwick method. APASS comparison stars. SQM: 20.7. Altitude: 10 deg.]
2018 May  10.64 UT: m1=12.5, Dia.=1.4’, DC=2/3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Poor seeing, low altitude = 17.8°; Coma very diffuse, weak centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 May  09.64 UT: m1=12.6, Dia.=1.3’, DC=2/3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight interference, elongation 10.6°. Coma diffuse, slightly brighter at centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 20.71 UT: m1=12.7, Dia.=1.1’, DC=4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult due to glare from bright star nearby; small opaque centre, sometimes appears faintly stellar in periods of good seeing. Sky a little hazy due to encroaching fog. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Apr. 16.75 UT: m1=12.6, Dia.=1.8’, DC=3/4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 15.74 UT: m1=12.9, Dia.=1.3’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan band filter; Coma small with slightly brighter and opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 14.69 UT: m1=13.8, Dia.=1’, DC=3, ... 25c-m L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia= [Difficult, coma close to faint stars. Coma circular in shape, slight brightening at centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 11.68 UT: m1=13.6, Dia.=0.8’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, very small and faint. Slight moonlight interference, moon altitude = 3.2°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2012 Sep. 22.33 UT: m1=15.9 CCD, Dia.=0.4′, ... 30.5-cm SCT ... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2005 Aug. 05.91 UT: m1=10.6, Dia.=2', DC=2, ... 32-cm L (75x) ... J. Carvajal (Avila, Spain)
2005 Aug. 04.89 UT: m1=10.7, Dia.=2', DC=2, ... 26-cm L (60x) ... J. Carvajal (Avila, Spain)
2005 Aug. 03.89 UT: m1=10.8, Dia.=1.5', DC=2, ... 26-cm L (60x) ... J. Carvajal (Avila, Spain)
2005 Aug. 02.94 UT: m1=12.2, Dia.=0.8', DC=3, ... 20-cm SCT (160x) ... Juan Jose Gonzalez (Alto del Castro - Aralla, alt. 1720 m, Leon, North Spain)
2005 July 02.90 UT: m1=12.9, Dia.=1.5', DC=1/, ... 45-cm L (100x) ... J. Carvajal (Avila, Spain)
1999 Oct. 10.79 UT: m1=14.3, Dia.=0.4', DC=3, ... 44-cm L (156x) ... Werner Hasubick (Buchloe, Germany)
1999 Sep. 12.32 UT: m1=14.0, Dia.=~1', DC=3, ... 51-cm L (186x) ... Charles Morris (Lockwood Valley, CA) 
1999 Sep. 10.85 UT: m1=13.2, Dia.=0.3', DC=4, ... 44-cm L (156x) ... Werner Hasubick (Buchloe, Germany)
1999 Sep. 09.85 UT: m1=13.5, Dia.=1.0', DC=2, ... 41-cm L (90x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Sep. 05.87 UT: m1=13.1, Dia.=0.6', DC=4, ... 44-cm L (156x) ... Werner Hasubick (Buchloe, Germany)
1999 Sep. 04.86 UT: m1=13.5, Dia.=0.8', DC=2, ... 41-cm L (200x) ... Andrew Pearce (Dowerin, Western Australia)
1999 Aug. 22.83 UT: m1=13.7, Dia.=0.9', DC=1, ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Aug. 21.80 UT: m1=13.6, Dia.=0.8', DC=2, ... 41-cm L (200x) ... Andrew Pearce (Nedlands, Western Australia)
1999 Aug. 14.01 UT: m1=12.9, Dia.=1', DC=0, ... 45-cm L (167x) ... J. Carvajal (Avila, Spain)
1999 July 17.98 UT: m1=12.8, Dia.=0.8', DC=3, ... 44-cm L (156x) ... Werner Hasubick (Buchloe, Germany)
1999 Apr. 28.89 UT: m1=12.9, Dia.=1.4', DC=2, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Apr. 27.88 UT: m1=12.9, Dia.=1.3', DC=2, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Apr. 26.89 UT: m1=12.8, Dia.=1.4', DC=2, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Apr. 25.88 UT: m1=12.9, Dia.=1.5', DC=2, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Apr. 20.85 UT: m1=13.3, Dia.=0.8', DC=2, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Apr. 19.86 UT: m1=13.3, Dia.=0.7', DC=3, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Apr. 12.83 UT: m1=13.2, Dia.=0.7', DC=3, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Apr. 11.89 UT: m1=13.2, Dia.=0.8', DC=2, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Mar. 27.86 UT: m1=13.5, Dia.=0.6', DC=2, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Mar. 26.87 UT: m1=13.6, Dia.=0.9', DC=2, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Mar. 25.86 UT: m1=13.6, Dia.=0.7', DC=2, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia)
1999 Mar. 23.88 UT: m1=13.6, Dia.=0.7', DC=3, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia) [Comet again seen as a diffuse object with some degree of condensation which confirms last night's observation. =20 Accurate magnitude was obtained due to close proximity of the variable star RR SGR which has a good sequence from VSS RASNZ. Clouds again made = the observation brief!]
1999 Mar. 22.87 UT: m1=13.5:, ... 41-cm L ... Andrew Pearce (Nedlands, Western Australia) [Comet observed as a distinct diffuse object at predicted position through breaks in the clouds. Unfortunately there wasn't enough time to check for motion and to make a more accurate magnitude estimate.]
1999 Mar. 22.50 UT: m1=13.3, Dia.=1', DC=3, ... 41-cm L ... Alan Hale (Cloudcroft, NM) [confirmation of yesterday's suspect; motion detected over ~20 minutes]
1999 Mar. 21.50 UT: m1=13.3:, Dia.=<1', ... 41-cm L ... Alan Hale (Cloudcroft, NM) [comet suspected during brief observing window before onset of dawn]
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