* * * * * 6P/d'Arrest * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2015 6 27.78 S 13.6 TA 25.0L 83 0.7 2/ WYA Walcha, NSW (Very difficult, zodiacal light interference, average seeing conditions. Coma very diffuse with small opaque weakly condensed centre. Altitude 19.1°. Limiting magnitude 14.5.) 2015 6 22.80 S 13.3 TA 25.0L 83 1.3 3 WYA Walcha, NSW (Very difficult, zodiacal light interference. Limiting magnitude 14.5. Altitude 22.5°.)
2008 12 28.812 S 12.3 AU 31.0J 89 2 2 DIJ Burlage 2008 12 28.807 S 12.0 AU 31.0J 89 1.8 0/ BOU Burlage, Germany 2008 12 26.780 S 11.7 AU 31.0J 72 2.5 1 BOU Lauwersoog 2008 11 23.39 S 10.6 TJ 40.0L 75 2.9 0/ YOS Kita-karuizawa, Gunma 2008 11 22.45 S 10.3 TJ 40.0L 75 3.2 2 YOS Kita-karuizawa, Gunma (Bright and large still now. It is getting higher now, so its faint outer coma is getting visible more clearly and widely than before.) 2008 11 16.78 S 9.7 TK 20.3T 77 5 2 GON Alto del Castro - Aralla, León (Altitude: 13 deg.} 2008 11 15.78 S 9.3 TK 10.0B 25 5 2 GON Aralla, León (Altitude: 13 deg.} 2008 11 5.98 S 9.5 TK 20.3T 77 6 1/ GON Aralla, León (Altitude: 6 deg.} 2008 11 3.50 S 9.8 AA 10.0B 25 6 SEA Cowra, NSW (Little different using Swan Band filter.} 2008 11 1.43 S 9.9 TJ 40.0L 75 1.8 3 YOS Kita-karuizawa, Gunma (Bright and looks still large. But not easy to see because it locates very low and the condensation is weak.) 2008 10 25.99 S 9.3 TK 20.3T 100 7 2/ GON Alto del Castro - Aralla, León (Altitude: 5 deg.} 2008 10 19.90 S 8.8 TK 20.3T 77 4 2 GON Alto del Castro - Aralla, León (Altitude: 11 deg. Moonlight interference.} 2008 10 3.86 S 8.3 TK 10.0B 25 7 3 GON El Portillo - Castrocontrigo, León (Altitude: 8 deg.} 2008 10 1.86 S 8.5 TK 20.3T 77 7 2 GON Alto del Castro - Aralla, León (Altitude: 8 deg.} 2008 9 24.97 S 8.5 TK 10.0B 25 8 3 GON Aralla, León (Altitude: 7 deg.} 2008 9 17.47 9.2 TK 10.0B 25 6 2/ MAT Castlemaine, Victoria (Large but diffuse. As expected this comet, with an unusual light curve, appears brighter after perihelion.) 2008 9 17.40 S 8.6 AA 10.0B 25 10 SEA Cowra, NSW 2008 9 9.48 S 9.0:TJ 40.0L 75 2.6 2/ YOS Kita-karuizawa, Gunma (It became very bright and large within last month. However, it is located close to a bright moon, so hard to see.) 2008 9 6.96 S 8.2 TK 10.0B 25 10 2 GON Alto del Trichero - Soto y Amío, León 2008 9 1.87 S 10.1 TK 40.7L 58 5.0 2 BIV Valdrôme 2008 8 28.89 S 9.6 TK 40.7L 58 6.0 3 BIV Valdrôme 2008 8 28.00 S 8.0 TK 5.0B 10 12 2 GON Alto del Castro - Aralla, León (Several stars inside the coma, the brightest being mag. 10.2 [Tycho-2].} 2008 8 27.91 S 9.6 TK 40.7L 58 6.0 3 BIV Valdrôme 2008 8 25.89 S 10.1 TK 40.7L 58 7.5 3 BIV Valdrôme 2008 8 25.88 S 9.4 TK 5.0B 7 10 2 BIV Valdrôme 2008 8 23.91 S 8.1 TK 10.0B 25 12 2/ GON Alto del Castro - Aralla, León 2008 8 23.90 S 10.1 TK 40.7L 58 5.0 3 BIV Valdrôme 2008 8 21.86 S 10.0 TK 40.7L 58 4.5 4 BIV Valdrôme 2008 8 19.86 S 8.3 TK 20.3T 77 7 3 GON Alto del Trichero - Soto y Amío, León (Estimate made after yesterday's little outburst. Starlike nucleus: m2=12.5 [TK] at 100x, surrounded by an assymetric condensation of about 0.7'. Astronomical twilight; some moonlight interference, moon's altitude: 4 deg. Mountain location, very clear sky.} 2008 8 19.41 S 8.8 AA 10.0B 25 SEA Cowra, NSW 2008 8 13.08 S 8.7 TK 10.0B 25 12 2/ GON Tábara, Zamora 2008 8 12.993 S 9.6 TK 15.6L 29 5 1 DIJ Garmerwolde 2008 8 12.990 S 9.1 TK 15.6L 24 7 1/ BOU Garmerwolde 2008 8 10.97 S 10.3 TK 25.6L 42 3.0 3 BIV Rambouillet 2008 8 9.03 S 8.9 TK 10.0B 25 7 2/ GON Alto del Castro - Aralla, León 2008 8 5.95 S 9.0 TK 10.0B 25 8 1/ GON Alto del Castro - Aralla, León 2008 8 5.94 S 9.3 TK 20.3T 77 7 2 GON Alto del Castro - Aralla, León 2008 8 5.01 S 9.8 TK 20.3T 77 7 2 GON Alto del Castro - Aralla, León 2008 8 5.00 S 9.6 TK 10.0B 25 8 1 GON Alto del Castro - Aralla, León 2008 8 3.51 S 11.7 AU 40.0L 144 1.6 2/ YOS Kita-karuizawa, Gunma (I was surprised that it is already bright and large. Diffuse, but already easy to see. It looks very large in a clear sky.} 2008 8 2.64 S 12.1 AU 40.0L 144 1.1 3 YOS Kita-karuizawa, Gunma 2008 8 1.95 S 10.8 TK 20.3T 100 4 2 GON Alto del Castro - Aralla, León (Clearly brighter than a week ago. Large, diffuse outer coma surrounding the central condensation area.) 2008 7 26.98 S 12.7 TA 20.3T 133 0.4 7 GON Alto del Castro - Aralla, León (Nearby field stars checked in DSS. Motion checked during a 60-min period. Mountain location, very clear sky.)