Category Archives: Comets

Comet Lovejoy Fades – Lost Lots of Its Tail

C/2014 Q2 (Lovejoy) on Feb 15, 2015, 01:32 UT.   47x60 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 (stock.)
C/2014 Q2 (Lovejoy) on Feb 15, 2015, 01:32 UT. 47×60 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 (stock.)

Looks like the disconnection event over the last two days has shortened Lovejoy down to a nub.  I expect that it might grow back a new tail, hopefully.

Here’s an another version of the data, but I added 35 minutes more of exposure to the mix:

C/2014 Q2 (Lovejoy) on Feb 15, 2015, 01:32 UT.   7x300sec @ ISO 1600 and 47x60 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 (stock.)
C/2014 Q2 (Lovejoy) on Feb 15, 2015, 01:32 UT. 7x300sec @ ISO 1600 and 47×60 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 (stock.)

Comet Lovejoy Tail Disruption Event

C/2014 Q2 (Lovejoy) on Feb 15, 2015, 01:32 UT.   47x60 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 (stock.)
C/2014 Q2 (Lovejoy) on Feb 15, 2015, 01:32 UT. 47×60 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 (stock.)
Negative View - C/2014 Q2 (Lovejoy) on Feb 14, 2015, 01:08 UT.  42x90 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR.
Negative View – C/2014 Q2 (Lovejoy) on Feb 14, 2015, 01:08 UT. 42×90 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR.

The nearly disconnected tail of Lovejoy blowing in the solar wind.   Something in the local space environment disrupted it within the last 2 days, it seems. Probably some kind of solar event like a CME or rogue magnetic field change caused this.

Comet Lovejoy Possible Tail Disconection Event

C/2014 Q2 (Lovejoy) on Feb 13, 2015, 01:00 UT.  58x90 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3.
C/2014 Q2 (Lovejoy) on Feb 13, 2015, 01:00 UT. 58×90 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3.
StarFreeze View: C/2014 Q2 (Lovejoy) on Feb 13, 2015, 01:00 UT. 58×90 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3.

 

Negative View: C/2014 Q2 (Lovejoy) on Feb 13, 2015, 01:00 UT.  58x90 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3.
Negative View: C/2014 Q2 (Lovejoy) on Feb 13, 2015, 01:00 UT. 58×90 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3.
Blue Version: C/2014 Q2 (Lovejoy) on Feb 13, 2015, 01:00 UT.  58x90 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3.
Blue Version: C/2014 Q2 (Lovejoy) on Feb 13, 2015, 01:00 UT. 58×90 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3.

A big knot moving down the tail of Comet Lovejoy with the old tail partially disconnected and hanging on as best as it can.

Comet Lovejoy’s Fantail on Feb 11, 2015, 01:00 UT

Comet Lovejoy Q2 on Feb 11, 2015, 01:00 UT.  78x60 sec @ ISO 6400, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR.  (StarStreaks version.)
Comet Lovejoy Q2 on Feb 11, 2015, 01:00 UT. 78×60 sec @ ISO 6400, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR. (StarStreaks version.)
Comet Lovejoy Q2 on Feb 11, 2015, 01:00 UT.  38x60 sec @ ISO 6400, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR.  (Comet Only Processing.)
Comet Lovejoy Q2 on Feb 11, 2015, 01:00 UT. 38×60 sec @ ISO 6400, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR. (Comet Only Processing.)

Moving further west each night, Comet Lovejoy Q2 continues to change and present a different profile each day.  It has gone back to a fan tail with streamers, much like it looked back on Jan 25 and Jan 16, 2015.    There is a pattern there, but the period remains elusive.

Comet Lovejoy in 15 Minutes

C/2014 Q2 (Lovejoy) on Feb 9, 2015, 00:47 UT. 1x900 sec @ ISO 200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR.
C/2014 Q2 (Lovejoy) on Feb 9, 2015, 00:47 UT. 1×900 sec @ ISO 200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR.

I’ve been wanting to shoot some sub-images of Comet Lovejoy at relatively low ISO’s and for at least 15 minutes.  Here’s one that was shot at ISO 200 and boosted up a bit with some curves manipulation in PS.  So, this is a representation of old-school, one-shot imaging like I used to do back in the day with film.  You don’t have much in the way of post processing since the image looks fairly nice without that sort of thing.

Update:

Here’s the preliminary image from the data captured in the same session as the above:

Comet Lovejoy Q2 on Feb 9, 2015, 01:04 UT. 17×120 sec @ ISO 3200 & 4×900 sec @ ISO 400. TV-85 at F/5.6, IDAS-LPS, Canon T3.

C/2014 Q2 (Lovejoy) on Feb 7, 2015, 01:03 UT

C/2014 Q2 (Lovejoy) on Feb 7, 2015, 01:03 UT. 31x180 sec @ ISO 1600, TV-85 at F/5.6, IDAS-LPS, Canon T3. Comet-Only version.
C/2014 Q2 (Lovejoy) on Feb 7, 2015, 01:03 UT. 31×180 sec @ ISO 1600, TV-85 at F/5.6, IDAS-LPS, Canon T3. Gaudy StarFreeze version.
C/2014 Q2 (Lovejoy) on Feb 7, 2015, 01:03 UT. 31x180 sec @ ISO 1600, TV-85 at F/5.6, IDAS-LPS, Canon T3. Combined StarFreeze version.
C/2014 Q2 (Lovejoy) on Feb 7, 2015, 01:03 UT. 31×180 sec @ ISO 1600, TV-85 at F/5.6, IDAS-LPS, Canon T3. Combined StarFreeze version.
C/2014 Q2 (Lovejoy) on Feb 7, 2015, 01:03 UT. 31x180 sec @ ISO 1600, TV-85 at F/5.6, IDAS-LPS, Canon T3. Comet-Only version.
C/2014 Q2 (Lovejoy) on Feb 7, 2015, 01:03 UT. 31×180 sec @ ISO 1600, TV-85 at F/5.6, IDAS-LPS, Canon T3. Comet-Only version.

Ok, I got some decent data on this imaging session, even though there were some high altitude clouds that came and went a few times.   Then, the moon rose and I stopped imaging at that point.    Lovejoy is presenting its thin, edge-on tail mode to us on this night.  It makes the tail brighter, that’s for sure.

Comet Lovejoy Q2, Feb 6, 2015, 00:47 UT

C/2014 Q2 (Lovejoy) on Feb 6, 2015, 00:47 UT.  30x120 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR.  (StarFreeze version.)
C/2014 Q2 (Lovejoy) on Feb 6, 2015, 00:47 UT. 30×120 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR. (StarFreeze version.)
C/2014 Q2 (Lovejoy) on Feb 6, 2015, 00:47 UT.  30x120 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR.  (StarStreaks version.)
C/2014 Q2 (Lovejoy) on Feb 6, 2015, 00:47 UT. 30×120 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR. (StarStreaks version.)
C/2014 Q2 (Lovejoy) on Feb 6, 2015, 00:47 UT.  30x120 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR.  (Comet Only version.)
C/2014 Q2 (Lovejoy) on Feb 6, 2015, 00:47 UT. 30×120 sec @ ISO 3200, TV-85 at F/5.6, IDAS-LPS, Canon T3 DSLR. (Comet Only version.)

The nearly full moon rose about an hour after twilight ended, so that gave me enough time to get 30 subs of Comet Lovejoy Q2 before it came up and started washing out the comet.   Lovejoy looks like it is not as bright as it once was, but it still has a long tail.