C/2017 K4 (ATLAS)
DEPARTED
Type: Periodic
Perihelion date: 8 January 2018
Perihelion distance (q): 2.6
Aphelion distance (Q) : 53.6
Period (years): 149
Eccentricity (e): 0.91
Inclination (i): 16.7
JPL orbit diagram
COBS lightcurve
A 17th magnitude comet was discovered in images taken with the 0.5m Schmidt at
Haleakala on 26 May 2017 by the ATLAS (Asteroid Terrestrial-impact Last Alert
System) team.
Observations (VEMag = visual equivalent magnitude)
Date
10x10 mag
Error
VEmag
Coma '
21-Jun-17
15.81
0.02
15.2
0.3
29-Jun-17
15.84
0.06
15.1
0.3
11-Oct-17
15.82
0.04
12-Nov-17
15.91
0.06
15.3
0.4
14-Jul-18
18.13
0.02
17.1
0.3
21-Aug-18
18.37
0.01
17.8
0.3
04-Sep-18
18.46
0.09
17.9
0.3
01-Oct-18
18.24
0.05
17.5
0.3
10-Oct-18
18.35
0.09
18.0
0.3
20-Oct-18
18.50
0.12
17.9
0.3
28-Oct-18
18.49
0.02
17.5
0.3
08-Nov-18
18.71
0.08
18.3
0.3
27-Nov-18
18.91
0.11
18.5
0.3
10-Dec-18
19.15
0.06
18.7
0.3
26-Dec-18
19.32
0.07
18.2
0.2