The following list was compiled by Worachate Boonplod.
All dates and magnitudes are approximate.Note that the limiting magnitude for LASCO C3 is approximately 8.0 to 8.5 (depending on object/star), and for C2 is approximately 8.5 - 9.0.
 

2018 LASCO image with transit paths overlaid
Image Credit: Worachate Boonplod

 

Regarding C/2017 S3 (PANSTARRS), magnitudes (brightness) of this comet are highly uncertain, ranging from around 0 to +7. We are not providing a value here until a more confident estimate is available, and also note the possibility exists that this comet will not survive perihelion.

LASCO C3

(Dec07)-Feb11

Venus

mag -4

right to left

Feb06-Feb26

Mercury

mag -2

right to left

Feb24-Mar12

Neptune

mag +8.0

left to right

Mar28-Apr06

Mercury

mag +5

left to right

Apr10-Apr27

Uranus

mag +5.9

left to right

May30-Jun12

Mercury

mag -2

right to left

Aug05-Aug13

Mercury

mag +5

left to right

Aug24-Sep13

C/2017 S3

TBD

lower left to top

Sep12-Oct01

Mercury

mag -2

right to left

Sep28-Oct16

1 Ceres

mag +8.5

left to right

Oct23-Oct30

Venus

mag -4

left to right

Nov16-Dec06

Jupiter

mag -1.7

left to right

Nov24-Nov30

Mercury

mag +5

left to right

Dec24-(Jan11

Saturn

mag +0.5

left to right

 

LASCO C2

Jan02-Jan16

Venus

mag -4

right to left

Mar02-Mar06

Neptune

mag +8.0

left to right

Apr16-Apr20

Uranus

mag +5.9

left to right

Jun04-Jun07

Mercury

mag -2

right to left

Sep19-Sep23

Mercury

mag -2

right to left

Nov24-Nov28

Jupiter

mag -1.7

left to right

Dec31-(Jan04

Saturn

mag +0.5

left to right