Fwd: [CometObs] Digest Number 3453

Comet Observations Group

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Digest #3453

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C/2016 R2, C/2018 N1, 21P. by "Juan Jose Gonzalez" jjgsgp

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C/2016 R2, C/2018 N1, 21P.

Fri Aug 3, 2018 8:10 am (PDT) . Posted by:

"Juan Jose Gonzalez" jjgsgp

C/2016 R2 (PANSTARRS):
2018 Aug. 1.90 UT: m1=11.3, Dia.=2.5', DC=2, 20 cm SCT (77x)..
[ End of astronomical twilight. Altitude: 18 deg.
Sidgwick method. Tycho-2 comparison stars. SQM : 21.0.].

C/2018 N1 (NEOWISE):
2018 July 31.90 UT: m1=8.5, Dia.=12', DC=1/, 20 cm SCT (77x)..
[ Very diffuse and wide coma. Altitude: 16 deg. Sidgwick method.
Tycho-2 comparison stars. SQM : 20.8; 21.5 at zenith.].

2018 Aug. 1.91 UT: m1=8.5, Dia.=11', DC=1/, 20 cm SCT (77x).
[ Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars.
SQM : 20.9.].

21P/Giacobini-Zinner:
2018 Aug. 1.92 UT: m1=9.3, Dia.=5', DC=5, 20 cm SCT (77x).
[ Sidgwick method. Tycho-2 comparison stars. SQM : 21.4.].

( Aug. 1 : SQM 21.6 at zenith.).

( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W).

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ICQ Format :

2016R2 2018 08 01.90 S 11.3 TK 20.3T10 77 2.5 2 ICQ
XX GON05

2018N1 2018 07 31.90 S 8.5 TK 20.3T10 77 12 1/ ICQ XX
GON05

2018N1 2018 08 01.91 S 8.5 TK 20.3T10 77 11 1/ ICQ
XX GON05

21 2018 08 01.92 S 9.3 TK 20.3T10 77 5 5 ICQ
XX GON05

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J. J. Gonzalez

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Colin James Watling

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Real Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)

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