Discovery certificate for object 2018tk
TNS Astronomical Transient Report No. 16904 [ 2018TNSTR.206....1S ]

Date Received (UTC): 2018-02-13 02:40:38
Sender: Dr. Clay Sherrod
Source Group: None

Clay Sherrod report/s the discovery of a new astronomical transient.

IAU Designation: AT 2018tk
Coordinates (J2000): RA = 04:23:20.800 (65.836667) DEC = +75:19:28.00 (75.324444)
Discovery date: 2018-02-13 01:36:16 (JD=2458162.5668519)


Remarks: P. Clay Sherrod, Arkansas Sky Observatories reports discovery of a possible 19.12 (unfiltered) supernova (mag about 19.12) on an unfiltered CCD frame taken 2018 Feb 13 01:23:47 UT using a 0.51-m f/5.9 astrograph on Petit Jean Mountain, USA. The new object is located at R.A. 04 23 20.80, Decl. +75 19 28.0 (equinox 2000.0), 106” NNW (P.A. = 341deg) of the center of NGC 1530. Sherrod notes that nothing was visible at this position on an image taken on Jan 08; note this faint star is very close (east) of 17th mag. A2_1650 00820899

Photometry

Discovery (first detection):
Discovery date: 2018-02-13 01:36:16
Flux: 19.12 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: 0.51m f/5.9 ASO Astrograph

Last non-detection:
Last non-detection date: 2018-01-08 02:45:36
Limiting flux: 20.1 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: ASO 0.51m astrograph f/5.9

Archival info: DSS

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2018tk