* * * * * 252P/LINEAR * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2016 6 3.56 S[12.5 TA 40.0L 144 !1.6 YOS Kita-karuizawa, Gunma (As already reported by Yoshimoto and Harikae, the comet seems to have fade rapidly. Unexpectedly, I could not see the comet even with 0.40-m reflector. Because the comet was located in the dense region of faint background stars, I tried to see a moving diffuse comet for totally 30 minutes both with 75x and 144x magnification. However, the comet was not visible.) 2016 6 01.00 S 10.0 TK 20.3T 77 6 0 GON Alto del Castro - Aralla, León 2016 5 31.024 S 9.7:TA 15.5L 29 5 0 DIJ Burlage 2016 5 30.56 S 11.0:AQ 40.6L 76 5 0 CAM Warners Bay, NSW 2016 5 30.51 S 11.6 AQ 25.0L 39 5.1 0 WYA Walcha, NSW (Very diffuse and difficult. Does not enhance with Swan Band filter.) 2016 5 27.03 S 9.4 TK 22.0L 60 8 2 GOI Araçatuba 2016 5 15.76 S 9.2 TK 8.0B 20 10 1 CAM Warners Bay, NSW 2016 5 15.09 S 8.2 TK 10.0B 25 12 2 GON Cueto Rosales, León 2016 5 14.76 S 9.3 TK 8.0R 12 8 1 CAM Warners Bay, NSW 2016 5 14.17 S 8.4 TK 10.0B 20 12 2/ GOI Araçatuba 2016 5 13.74 S 9.3 TK 8.0B 20 8 1 CAM Warners Bay, NSW 2016 5 12.76 S 9.1 TK 8.0B 20 8 1 CAM Warners Bay, NSW 2016 5 11.981 S 8.1 TA 8.0B 15 11 1 DIJ Burlage 2016 5 11.75 S 8.8 TK 8.0B 20 10 1 CAM Warners Bay, NSW 2016 5 10.75 S 8.4 TK 8.0B 20 &10 1 CAM Warners Bay, NSW (Comet was located close to a magnitude 7.3 star which made the estimate of the coma difficult so only an approximate diameter could be given.) 2016 5 9.76 S 8.0 TK 8.0B 20 12 1 CAM Warners Bay, NSW 2016 5 8.940 S 7.9 TK 8.0B 15 12 2 BOU Burlage, Germany 2016 5 8.937 S 7.9 TK 8.0B 15 11 1/ DIJ Burlage 2016 5 8.00 S 8.1 TK 8.0B 15 &15 0 SCH Eerbeek 2016 5 7.918 S 7.7 TK 8.0B 15 13 1/ DIJ Burlage 2016 5 6.76 S 7.8 TK 8.0B 20 15 2 CAM Warners Bay, NSW 2016 5 6.17 S 7.7 TK 5.0B 7 15 2 GOI Araçatuba 2016 5 5.76 S 7.8 TK 8.0B 20 12 2 CAM Warners Bay, NSW 2016 5 5.01 S 7.9 TK 8.0B 15 &15 0 SCH Eerbeek 2016 5 4.933 S 7.7 TK 8.0B 15 13 1/ BOU Sint Annen 2016 5 4.895 S 7.5 TK 8.0B 15 16 2 DIJ Burlage 2016 5 4.75 S 7.6 TK 8.0B 20 12 2 CAM Warners Bay, NSW 2016 5 4.72 S 8.5 TJ 40.0L 36 10 3 YOS Kita-karuizawa, Gunma 2016 5 4.71 S 7.9 TJ 7.0R 10 16 1 YOS Kita-karuizawa, Gunma 2016 5 4.65 S 7.5 TK 5.0B 7 20 2 WYA Walcha, NSW (Enhances well in Swan Band filter. Outer coma semi-transparent brightening slightly to a weakly condensed centre.) 2016 5 4.19 S 7.4 TK 5.0B 7 15 2 GOI Araçatuba 2016 5 3.935 S 7.5 TK 8.0B 15 13 2 BOU Sint Annen (Some interference from star of magnitude 9.7 [TK] in coma.) 2016 5 3.906 S 7.4 TK 8.0B 15 14 2 DIJ Burlage 2016 5 3.70 S 7.4 TK 8.0B 20 12 3 CAM Warners Bay, NSW 2016 5 3.17 S 7.3 TK 5.0B 7 18 2/ GOI Araçatuba 2016 5 2.77 S 7.5 TK 8.0B 20 15 1 CAM Warners Bay, NSW 2016 5 2.01 S 7.3 TK 8.0B 15 &16 0 SCH Eerbeek 2016 5 1.926 S 7.3 TK 5.0B 10 16 2/ BOU Burlage, Germany 2016 5 1.926 S 7.2 TK 8.0B 15 16 2 DIJ Burlage 2016 5 1.77 S 7.5 TK 8.0B 20 12 1 CAM Warners Bay, NSW (Comet was fairly easy to observe with 20x80B. Coma appeared vague and of low surface brightness. Not sure if this was due to the last quarter moonlight [32% illuminated].) 2016 5 1.66 S 7.9 TJ 7.0R 10 14 1 YOS Kita-karuizawa, Gunma (It became faint, but bright and large still now.) 2016 5 1.65 S 8.9 TJ 40.0L 36 9 2 YOS Kita-karuizawa, Gunma 2016 5 1.17 S 7.1 TK 5.0B 7 20 3 GOI Araçatuba 2016 5 1.00 S 6.8 TK 5.0B 10 20 2/ GON Cueto Rosales, León 2016 4 30.953 S 7.4 TK 8.0B 15 14 2 BOU Sint Annen 2016 4 28.941 S 7.1 TK 5.0B 10 15 2 DIJ Burlage 2016 4 28.927 S 7.2 TK 8.0B 15 15 2 BOU Sint Annen 2016 4 28.78 S 7.6 TK 20.3L 62 10 1 CAM Warners Bay, NSW (Coma was larger this morning due to less moonlight. Comet is very diffuse with very little condensation. Swan filter helps to improve the contrast from the background moonlit sky.) 2016 4 27.972 S 6.9 TK 5.0B 10 17 2 DIJ Burlage 2016 4 27.76 S 7.5 TK 20.3L 62 8 1 CAM Warners Bay, NSW (Comet was easier to see with decreasing moonlight. Coma was larger, Swan filter helped in seeing more coma. Very diffuse with only a very slight condensation or brightening in the center of the coma.) 2016 4 26.932 S 7.1 TK 8.0B 15 15 2 BOU Sint Annen 2016 4 26.77 S 7.3 TK 20.3L 62 5 1 CAM Warners Bay, NSW 2016 4 24.78 S 7.4:TK 20.3L 62 5 1 CAM Warners Bay, NSW 2016 4 21.76 S 6.8 TK 8.0B 20 10 2 CAM Warners Bay, NSW 2016 4 20.76 S 6.6 TK 8.0B 20 13 2 CAM Warners Bay, NSW 2016 4 19.79 S 6.6 TK 8.0B 20 15 3 CAM Warners Bay, NSW 2016 4 18.75 S 6.6 TK 8.0B 20 15 3 CAM Warners Bay, NSW 2016 4 18.21 S 6.5 HD 5.0B 7 22 3 GOI Araçatuba (Moonlight.) 2016 4 17.25 S 6.4 HD 5.0B 7 25 3 GOI Araçatuba 2016 4 17.104 S 6.3 TK 5.0B 10 29 2/ DIJ Burlage 2016 4 16.21 S 6.2 HD 5.0B 7 25 3/ GOI Araçatuba 2016 4 15.78 S 6.2 TK 8.0B 20 &15 3 CAM Warners Bay, NSW 2016 4 15.74 S 6.3 TJ 7.0R 10 30 3 YOS Mt. Hanadate, Ibaraki (Still bright and easy to see. I felt it became slightly fainter and smaller than last week. But my measurement became same as last week. I enjoyed the rendezvous with open cluster IC 4665.) 2016 4 14.77 S 6.0 TK 8.0B 20 20 3 CAM Warners Bay, NSW 2016 4 13.101 S 6.9 TK 5.0B 12 9 2 LOO Genk 2016 4 12.77 S 6.2 TK 8.0B 20 20 2 CAM 2016 4 12.18 S 6.0 HD 5.0B 7 30 4 GOI Araçatuba 2016 4 12.112 S 6.9 TK 5.0B 12 9 2 LOO Genk 2016 4 11.77 S 6.2:TK 8.0B 20 &15 2 CAM Warners Bay, NSW 2016 4 11.118 S 6.3 TK 5.0B 12 10 2 LOO Genk 2016 4 11.09 S 6.1 TK 4.0B 8 &18 1 SCH Eerbeek 2016 4 10.999 S 6.1 YG 5.0B 7 25 2/ BOU Burlage, Germany 2016 4 10.996 S 6.2 TK 5.0B 10 21 2 DIJ Burlage 2016 4 10.77 S 6.0 TK 8.0B 20 30 2 CAM Warners Bay, NSW 2016 4 10.25 S 6.0 HD 5.0B 7 30 4 GOI Araçatuba 2016 4 9.23 S 5.9 HD 5.0B 7 30 4 GOI Araçatuba 2016 4 9.10 S 6.0 TK 4.0B 8 &20 1 SCH Eerbeek (Very big and diffuse comet.) 2016 4 8.989 S 5.8 TK 5.0B 10 25 2/ DIJ Burlage 2016 4 8.65 S 6.3 YG 7.0R 10 30 3 YOS Mt. Hanadate, Ibaraki (Extremely large. Diffuse, but easy to see.) 2016 4 8.21 S 5.8 HD 5.0B 7 35 4 GOI Araçatuba 2016 4 7.21 S 5.7 HD 5.0B 7 40 3/ GOI Araçatuba 2016 4 7.14 S 6.4 TK 8.0B 15 11 2 DeS Beert 2016 4 7.10 S 6.0:TK 4.0B 8 &25 1 SCH Eerbeek (Very big and diffuse comet. Defocussing-issue.) 2016 4 7.073 S 5.8 YG 5.0B 7 30 2/ BOU Sint Annen 2016 4 7.06 S 5.2:TK 0.0E 1 50 3 GON Alto de la Camperona, León 2016 4 7.05 S 5.6 TK 5.0R 6 35 2/ GON Alto de la Camperona, León 2016 4 7.021 S 5.8 TK 5.0B 7 34 2/ DIJ Burlage 2016 4 6.72 M 5.3 TK 2.8R 3.3 35 4 WYA Walcha, NSW (Coma large and diffuse with a moderately condensed centre.) 2016 4 6.70 M 5.8 TK 5.0B 7 30 3/ WYA Walcha, NSW (Coma enhances strongly in Swan Band filter, no tail visible. Semi-transparent outer coma gradually brightening to a broad and moderately compacted centre. Coma colour is blue/green.) 2016 4 6.61 S 5.8 TK 8.0B 20 30 2 CAM Warners Bay, NSW 2016 4 6.100 S 7.5 TK 5.0B 10 12 2 LOO Genk 2016 4 6.052 S 5.7 TK 5.0B 10 25 2/ DIJ Burlage 2016 4 5.19 S 5.7 HD 5.0B 7 40 3/ GOI Araçatuba 2016 4 4.71 S 6.0 TK 8.0B 20 25 2 CAM Warners Bay, NSW 2016 4 3.21 S 5.6 HD 5.0B 7 45 4 GOI Araçatuba 2016 4 2.59 S 6.0 TK 8.0B 20 20 2/ CAM Warners Bay, NSW 2016 4 2.56 M 4.9 TK 2.8R 3.3 54 4 WYA Walcha, NSW (Instrument used was handheld 50mm f/1.8 Canon EOS lens with 15mm Plössl eyepiece. Outer coma semi-transparent, inner coma moderately condensed.) 2016 4 2.55 M 5.5 TK 5.0B 7 43 3/ WYA Walcha, NSW (Outer coma opaque and diffuse, moderately condensed. Enhances strongly in Swan Band filter. Visible naked eye but close to magnitude 4.6 star 60 away. Low altitude 12.9°. SQM reading 21.66 [average over 6 readings].) 2016 4 2.18 S 5.5 HD 5.0B 7 50 4 GOI Araçatuba (Increase of brightness and condensation degree.) 2016 4 2.113 S 5.9 TK 5.0B 10 30 1/ DIJ Burlage 2016 4 1.11 S 6.5:TK 8.0B 15 &18 0 SCH Eerbeek (Moonlight. Very big and diffuse comet.) 2016 4 1.08 S 5.0:TK 0.0E 1 70 2 GON Quintana del Castillo, León 2016 4 1.07 S 5.4 TK 5.0R 6 45 2/ GON Quintana del Castillo, León (Before moonrise. Mountain location, very clear sky.) 2016 4 1.067 S 6.1 YG 5.0B 7 25 1/ BOU Sint Annen 2016 3 31.74 S 6.2 TK 8.0B 20 20 1/ CAM Warners Bay, NSW (Last Quarter Moonlight.) 2016 3 30.74 S 6.0 TK 8.0B 20 20 2 CAM Warners Bay, NSW (Last Quarter Moonlight. Moon 7° from the the comet, made observation difficult.) 2016 3 28.17 S 6.0 HD 5.0B 7 30 2 GOI Araçatuba (Moonlight.) 2016 3 26.74 S 5.7 TK 8.0B 20 30 2 CAM Cobram. VIC (Strong Moon Light.) 2016 3 25.74 S 5.4 TK 8.0B 20 30 2 CAM Cobram, VIC (Strong Moon Light.) 2016 3 23.76 S 4.8 TK 8.0B 20 25 1 CAM Warners Bay, NSW 2016 3 23.23 S 4.8 HD 5.0B 7 50 2 GOI Araçatuba (Moonlight, clouds.) 2016 3 22.74 S 4.7 TK 8.0B 20 30 1/ CAM Warners Bay, NSW (Comet Observed high in the sky under Full Moon light.) 2016 3 21.72 S 4.5 TK 5.0B 7 40 2 WYA Walcha, NSW (Moonlight. Coma very diffuse, slightly brighter inner coma that is weakly condensed. Enhances well in Swan Band filter. Just visible naked eye and easily visible with Swan Band filter applied to the eye.) 2016 3 21.34 I 4.2:HD 0.7E 1 150 2 GOI Araçatuba 2016 3 21.33 S 4.5 HD 5.0B 7 90 3 GOI Araçatuba 2016 3 19.71 I 4.3 TK 0.0E 1 &60 1 CAM Warners Bay, NSW 2016 3 19.71 S 4.5 TK 8.0B 20 &50 2 CAM Warners Bay, NSW 2016 3 19.44 S 4.5 TK 8.0B 20 &40 1 CAM Warners Bay, NSW 2016 3 19.29 I 4.7:HD 0.7E 1 90 1 GOI Araçatuba 2016 3 19.28 S 5.0 HD 5.0B 7 60 2/ GOI Araçatuba 2016 3 18.71 S 5.2 TK 8.0B 20 &40 1 CAM Warners Bay, NSW 2016 3 18.71 I 5.0 TK 0.0E 1 &30 1 CAM Warners Bay, NSW 2016 3 18.49 S 5.2 TK 8.0B 20 &30 1 CAM Warners Bay, NSW 2016 3 18.22 S 5.3 TK 5.0B 7 45 1/ GOI Araçatuba 2016 3 17.76 S 5.5 TK 8.0B 20 &30 1 CAM Warners Bay, NSW 2016 3 17.68 S 5.6 TK 5.0B 7 39 2 WYA Walcha, NSW (Diffuse coma, slightly brighter in centre but weakly condensed. Visible naked eye as a diffuse round patch, DC of 1, diameter of 68. Altitude 21°.) 2016 3 17.47 S 5.5 TK 5.0B 7 33 2/ WYA Walcha, NSW (Moonlight. Coma large and diffuse, slight brightening to opaque and weakly compact towards centre. Observed through gaps in intervening cloud.) 2016 3 17.46 S 5.5 TK 8.0R 16 &30 1 CAM Warners Bay, NSW 2016 3 17.46 S 5.5 TK 8.0B 20 &40 2 CAM Warners Bay, NSW 2016 3 17.13 S 5.6 TK 5.0B 7 40 1/ GOI Araçatuba (Moonlight.) 2016 3 16.44 S 5.8 TK 8.0B 20 &40 2 CAM Warners Bay, NSW 2016 3 16.14 S 6.1 TK 5.0B 7 35 1/ GOI Araçatuba 2016 3 14.06 S 6.6 TK 5.0B 7 30 1/ GOI Araçatuba 2016 3 13.04 S 7.8 TK 5.0B 7 18 1 GOI Araçatuba 2016 3 13.03 S 7.9 TK 10.0B 20 15 2 GOI Araçatuba 2016 3 12.45 S 7.0 TK 5.0B 7 29 2 WYA Walcha, NSW (Coma large, outer coma circular and semi-transparent, inner coma opaque and weakly condensed. Enhances well in Swan Band filter.) 2016 3 12.44 S 6.5 TK 8.0B 20 &25 1 CAM Warners Bay, NSW 2016 3 12.43 S 6.5 TK 8.0R 16 &20 2 CAM Warners Bay, NSW 2016 3 11.46 S 7.0 TK 5.0B 10 33 2 WYA Walcha, NSW (Coma very large and diffuse. Inner coma weakly condensed and opaque covering over half the coma diameter and pale aqua-blue in colour.) 2016 3 11.02 S 8.6 TK 10.0B 20 12 1/ GOI Araçatuba 2016 3 9.49 S 7.5 TK 5.0B 7 24 2/ WYA Walcha, NSW (Coma very large in size, outer coma semi-transparent, slightly brighter although weakly condensed centre, pale blue in colour.) 2016 3 9.44 S 9.2 TK 20.3L 62 8 1 CAM Warners Bay, NSW 2016 3 9.43 S 9.5 TK 40.6L 76 5 2 CAM Warners Bay, NSW 2016 3 9.43 S 9.0:TK 8.0R 36 &15 0 CAM Warners Bay, NSW 2016 3 8.46 S 9.8 TK 40.6L 76 7 2 CAM Warners Bay, NSW 2016 3 8.44 S 9.2 TK 25.0L 39 10.1 2 WYA Walcha, NSW (Coma enhances moderately in Swan Band filter. Outer coma large and diffuse and slightly elongated to the West [Coma 10.1 x 13.1]. Visible in 7x50B as a large diffuse featureless smudge.) 2016 3 8.02 S 10.5 AU 22.0L 60 4 2/ GOI Araçatuba 2016 3 7.44 S 9.8 AQ 25.0L 39 10 2 WYA Walcha, NSW (Coma large, diffuse with slightly brighter but weakly condensed centre. Enhances slightly in Swan Band filter. Faint background stars in coma. Visible in 11x70B as a diffuse and featureless patch of light.) 2016 3 7.43 S 10.2 TK 20.3L 62 7 1 CAM Warners Bay, NSW 2016 3 7.42 S 10.3 TK 40.6L 76 5 2 CAM Warners Bay, NSW 2016 3 7.06 S 10.8 AU 22.0L 60 3 2 GOI Araçatuba 2016 3 6.53 S 10.2 TK 20.3L 62 8 1 CAM Warners Bay, NSW 2016 3 6.52 S 10.5 TK 40.6L 76 6 2 CAM Warners Bay, NSW 2016 3 6.47 S 11.3 GA 25,0L 71 8 1 SEA Cowra, NSW (Very low surface brightness. Less visible at higher magnification.) 2016 3 6.42 S 9.9 AQ 25.0L 39 8.4 1/ WYA Walcha, NSW (Large transparent outer coma, circular. Slightly brighter inner coma broad and diffuse. Enhances slightly using Swan Band filter.) 2016 3 5.84 S 10.5 TK 20.3T 77 5 1/ GON El Chano - Riofrío, León (Altitude 9°.) 2016 3 5.44 S 11.0 AQ 40.6L 76 6 1 CAM Warners Bay, NSW 2016 3 5.44 S 10.0:AQ 8.0R 36 &10 0 CAM Warners Bay, NSW 2016 3 5.44 S 10.3 AQ 20.3L 62 8 1 CAM Warners Bay, NSW 2016 3 5.44 S 10.4:AQ 25.0L 39 9.0 1 WYA Walcha, NSW (Inner coma appears elongated NE to SW, outer coma appears circular and transparent. Coma enhances slightly using Swan Band filter. Observation made difficult due to superimposition over background stars. Magnitude uncertain due to this interference.) 2016 3 4.49 S 13.5 AQ 40.6L 165 0.9 2 CAM Warners Bay, NSW 2016 3 4.43 S 10.6 AQ 25.0L 39 7.9 1 WYA Walcha, NSW (Coma appears large, circular and diffuse. Outer coma transparent, inner coma slightly brighter but very weakly condensed. Coma colour has a slight blue/green tinge to it. Enhances moderately in Swan Band filter. Altitude 68.6°. SQM was 21.67 [averaged]. Could just barely make it out using 11x70 Bs but bordering on threshold.) 2016 3 3.44 S 13.6 AQ 40.6L 260 0.8 2 CAM Warners Bay, NSW 2016 3 1.43 S 14.0 AQ 40.6L 260 0.8 2 CAM Warners Bay, NSW 2016 2 29.44 S 13.8 AQ 25.0L 83 0.8 2 WYA Walcha, NSW (Outer coma appears very diffuse and transparent, inner coma slightly brighter but diffused. Does not appear to enhance in Swan Band filter. Observed motion over 40 minute period. Windy conditions. SQM = 21.85 in vicinity of υ2 Eri [averaged over 6 readings].) 2016 2 28.43 S 14.0 AQ 40.6L 260 1 2 CAM Warners Bay, NSW