C/2009 F4 (McNaught)
DEPARTED
Type: Hyperbolic
Perihelion date: 31 December 2011
Perihelion distance (q): 5.5
Aphelion distance (Q) : n/a
Period (years): n/a
Eccentricity (e): 1.00
Inclination (i): 79.3
JPL orbit diagram
COBS lightcurve
Rob McNaught discovered an 18th magnitude comet on images taken during the
Siding Spring Survey with the 0.5-m Uppsala Schmidt on 19 March 2009.
Brian Marsden notes on MPEC 2009-L12 [2009 June 3] that the "original" and
"future" barycentric values of 1/a are -0.000078 and -0.000016 (+/- 0.000101) AU^-1,
respectively. The small "original" value shows that this comet is on its first visit to the
inner solar system.
Observations (VEMag = visual equivalent magnitude)
Date
10x10 mag
Error
VEmag
Coma '
06-Jan-13
15.90
0.02
16-Jan-13
16.11
0.02
06-Feb-13
15.84
0.05
13.0
0.6
22-Feb-13
15.99
0.02
13.3
0.6
07-Aug-13
16.36
0.02
13.6
0.6
01-Oct-13
16.75
0.04
13.6
0.6
11-Oct-13
16.72
0.02
13.8
1.6
27-Oct-13
16.92
0.05
14.0
0.9
10-Nov-13
17.04
0.02
13.9
0.6
07-Dec-13
16.89
0.03
14.2
0.8
26-Dec-13
16.97
0.05
14.2
0.9
07-Jan-14
17.24
0.27
14.8
0.4
31-Jan-14
17.15
0.02
14.6
0.6
10-Feb-14
17.05
0.06
14.7
0.5
20-Feb-14
17.39
0.04
15.0
0.7
02-Mar-14
17.44
0.04
15.0
0.4
19-Mar-14
17.55
0.07
15.4
0.3
03-Jul-14
18.15
0.06
16.7
0.2