all the colorful stars

I planned to finish my binocular mirror mount last night but found the RTV I planned to use was too old; so will need to head to the hardware store today.  I observed with Big Blue instead.  Seeing was not very good and there was the usual marine haze.  Moon and Mars through binoviewers after dark.  Nearly precisely a half moon; nice scattering of rays and crater splahes.  Then back after 9pm for doubles, 553x in spite of the imperfect seeing.

STF 2799: Equal yellow-orange, ~5" [Either my separation estimate is way off or I didn't see this...]
21H 28M 52.79S +11° 05' 05.2" P.A. 257.9 SEP 1.88 MAG 7.37,7.44 SP F4V DIST. 105.04 PC (342.64 L.Y.)

BU 163: Very close but clean split momentarily with seeing; both yellow-orange, 3 delta mag, <1" [AB seen; 5 stars in system but rest are too faint]
21H 18M 34.85S +11° 34' 08.2" P.A. 77.5 SEP 0.91 MAG 7.31,8.88 SP G0V+G6V DIST. 47.66 PC (155.47 L.Y.)

STF 2786: Pale yellow stars, B a slightly darker tint though 1 delta mag dimmer; well split 6-8" [My estimates off?]
21H 19M 39.36S +09° 31' 30.3" P.A. 189 SEP 2.8 MAG 7.49,8.20 SP A3IV

Ozone smell...  I've noticed this lately, after 9pm there's an ozone smell in the air, as if it's going to rain.

STF 2765: Faint, matched, slightly red tinted stars, ~8" [AB seen though split over-estimated]
21H 10M 59.31S +09° 32' 57.9" P.A. 79 SEP 2.8 MAG 8.47,8.50 SP A3IV

S 781: Finder split, super-wide, equal yellow-orange stars [Though I looked at the time in case one of these stars had a close pair, I did not see any -- and turns out one of them is a BU, #270, 7.42/9.40 0.5" -- not possible in the 12.5-inch but maybe the 20-inch...]
21H 13M 27.24S +07° 13' 04.9" P.A. 172 SEP 186.1 MAG 7.25,7.17 SP A7V

STF 2742: equal light orange, wide, 10-12", pretty. [Why are my separation estimates so far off?]
21H 02M 12.51S +07° 10' 47.3" P.A. 215 SEP 2.9 MAG 7.41,7.64 SP F8

STF 2737: Easy yellow stars, very wide, 1 delta mag. [AB,C seen.  AB is 0.2" and must've been wider at discovery.  5 stars in system -- but not physical, so how did it get in to CDSA 2nd edition?]
20H 59M 04.54S +04° 17' 37.8" P.A. 67 SEP 10.5 MAG 5.30,7.05 SP F6IV+DF4

STF 2735: Pretty orange and blue, Alberio-like, 2 delta mag, wide-ish ~6" [Again with the separation...]
20H 55M 40.64S +04° 31' 57.7" P.A. 281 SEP 2 MAG 6.45,7.54 SP G6III-IV

STF 2744: Split, 1.5", near equal yellow-orange stars.  [4 stars in system, fainter]
21H 03M 03.09S +01° 31' 55.9" P.A. 102.2 SEP 1.19 MAG 6.76,7.33 SP F7IV DIST. 70.82 PC (231.01 L.Y.)

So many colored stars!

Howe 55: Bright light orange with fainter bluish B, very wide separation.  Second nearly as faint star a little further out and to the side.

Ho 292: Extremely faint B, 2", PA to north?  Averted vision only. [Seems like a yes!]
22H 23M 15.11S +05° 38' 47.8" P.A. 65 SEP 3.9 MAG 7.66,11.24 SP A2

STF 2920: Blue-white stars, very wide, 1 delta mag.  [AB seen, AC too faint]
22H 34M 31.58S +04° 13' 20.6" P.A. 144 SEP 13.7 MAG 7.55,8.85 SP B9.5V

BU 701: Orange star.  Could be a slightly mis-shaped disk, or the very wide separated bluish star 2-3 delta mag.  [AB is the former, AC is the latter -- 11.97 mag 126"!]
22H 28M 07.24S +12° 14' 55.5" P.A. 176.8 SEP 0.99 MAG 7.34,9.62 SP K0V DIST. 66.4 PC (216.6 L.Y.)

Ho 296: Snowman.  Light orange.  Very tough. [Totally awesome catch! 0.43".  2 other pairs in system very wide and faint.]
22H 40M 52.71S +14° 32' 57.5" P.A. 43 SEP 0.43 MAG 6.14,7.22 SP G4V DIST. 33.8 PC (110.26 L.Y.)

STF 2908:  Orange and blue (for faintness).  Very wide separation, 2 delta mag.
22H 28M 11.55S +17° 15' 47.9" P.A. 113 SEP 9 MAG 7.74,9.68 SP G9III

I'm impressed by all the colors in this part of the sky.  Why are many doubles colorful?  Many variables are colorful too, and are also binary... wonder why.