C/2018 A3 (ATLAS)
DEPARTED
Type: Periodic
Perihelion date: 12 January 2019
Perihelion distance (q): 3.3
Aphelion distance (Q) : 989
Period (years): 11,045
Eccentricity (e): 0.99
Inclination (i): 139.6
JPL orbit diagram
COBS lightcurve
An 18th magnitude comet was discovered in images taken with the 0.5m Schmidt at
Mauna Loa on 10 January 2018 by the ATLAS (Asteroid Terrestrial-impact Last Alert
System) team. It had been posted on the PCCP as A105UPd.
Observations (VEMag = visual equivalent magnitude)
Date
10x10 mag
Error
VEmag
Coma '
15-Jan-18
18.40
0.08
17.9
0.2
22-Jan-18
18.23
0.04
18.0
0.2
14-Feb-18
17.61
0.03
17.5
0.2
21-Feb-18
17.45
0.02
17.3
0.2
11-Mar-18
17.17
0.04
16.9
0.3
20-Mar-18
16.98
0.02
16.5
0.3
06-Apr-18
17.10
0.02
16.8
0.3
19-Apr-18
17.14
0.02
16.7
0.3
06-May-18
17.13
0.02
17.0
0.3
16-May-18
17.06
0.03
16.8
0.2
04-Jun-18
17.33
0.03
17.0
0.2
16-Oct-18
16.54
0.03
15.6
0.4
24-Oct-18
16.62
0.09
15.5
0.3
10-Nov-18
16.51
0.02
15.8
0.3
19-Nov-18
16.47
0.02
15.2
0.5
03-Dec-18
16.60
0.02
15.4
0.7
11-Dec-18
16.57
0.02
15.7
0.5
18-Dec-18
16.06
0.03
15.1
0.4
30-Dec-18
16.44
0.04
15.4
0.5
06-Jan-19
16.27
0.03
14.9
0.6
13-Jan-19
16.50
0.02
15.5
0.5
10-Sep-19
17.88
0.06
16.1
0.2
24-Sep-19
17.74
0.03
17.1
0.2
01-Oct-19
17.57
0.03
16.7
0.3
08-Oct-19
17.68
0.04
17.3
0.3
22-Oct-19
17.57
0.01
17.1
0.3
29-Oct-19
17.62
0.06
17.1
0.3
20-Nov-19
17.72
0.15
17.5
0.2
27-Nov-19
18.07
0.06
17.9
0.2
20-Dec-19
18.46
0.04
18.0
0.3
27-Dec-19
18.54
0.06
18.2
0.3
16-Jan-20
19.03
0.08
18.8
0.2