By observing one and then the other, I could immediately tell Struves are brighter and generally more widely separated, while Burnhams are closer and have a larger delta mag. One can deduce this by just reviewing magnitude and separation tables of their pairs, but it is striking and obvious to see in the eyepiece. Struve should have been able to see many of the the Burnham 6-inch pairs, especially given his 3-inch aperture advantage over Burnham. I read somewhere Struve observed very quickly, spending only a minute or two on each star, so it could be he did not pay the close attention needed to detect close unequal pairs. Or maybe he saw these, but there was a limitation with his micrometer in getting a faint pair under the wire for measurement, so didn't take a measure and didn't publish the discovery.
STF1015 AB: 178; 150x: Well split, near equal, white. WDS says parallax indicates physical, however their ranges do not overlap (-33%), so really these are not likely to be physical.
07h 04m 55.36s -05° 46' 28.4" P.A. 199.00 sep 4.9 mag 9.41,9.40 Sp A0
STF1028 AB: 178; 150x: Light orange A and wide, much fainter B, at the edge of a triangle-shaped open cluster (NGC 2343). WDS uncertain, and there is 32% parallax range overlap, a rather wide 11,464 AU weighted separation, but large 4.82+2.64 Msol -- so might be binary. SIMBAD shows the secondary as part of NGC 2343 (#11), but the primary, HD 54387, is not included as an NGC 2343 member; maybe the NGC count needs to be revised given the EDR3 parallax data?
07h 08m 16.08s -10° 37' 25.8" P.A. 304.00 sep 11.0 mag 8.59,11.10 Sp G5
STF1034 AB: 178; 150x: Close unequal pair, just split this low magnification. WDS says parallax indicates physical. It has 7% parallax range overlap, 281 AU weighted separation, 1.26/1.11 Msol, and the radial velocity delta (2.31) is less than the escape velocity (3.86), so it is binary.
07h 09m 21.70s -08° 18' 58.4" P.A. 10.00 sep 2.4 mag 9.43,9.89
STF1036 AB: 178; 150x: Wide 1 Dm. Not physical.
07h 10m 12.63s -06° 16' 42.9" P.A. 103.00 sep 17.4 mag 9.22,9.92 Sp F5
STF1043 AB: 178; 150x: Very fine, equal white stars, just split. WDS says parallax indicates physical, and they do overlap 84% of their parallax ranges, have 977 AU weighted separation, and equal 2.26 Msol, so likely binary
STF1109 AB: 178; 150x: Quite fine, white stars, near equal, nicely separated around 3". WDS says not physical, but they share 38% parallax overlap, 3,023 AU weighted separation, and healthy 3.57+3.60 Msol, and are likely binary
07h 31m 54.40s -00° 31' 30.9" P.A. 17.00 sep 3.1 mag 9.26,9.26 Sp A0
STF1133 AB: 178; 150x: Ice blue-white A and light orange B, brighter than 10th magnitude, around 1 Dm. WDS uncertain, but 68% of their parallax ranges overlap, 956 AU weighted separation, and 1.89+1.50 Msol, so they are likely binary.
07h 42m 34.02s -04° 01' 35.4" P.A. 108.00 sep 4.3 mag 8.88,9.96 Sp A5 dist. 152.21 pc (496.51 l.y.)
STF1152 AB: 178; 150x: 2 Dm, well split stars. WDS says not physical, but 5% of their parallax ranges overlap, 1,693 AU weighted separation, 2.48+1.59 Msol, and the radial velocity delta (0.5) is much less than the escape velocity (2.07), so they may be binary.
07h 50m 59.24s -03° 07' 15.6" P.A. 314.00 sep 6.0 mag 8.41,10.29 Sp G5 dist. 316.46 pc (1032.29 l.y.)
STF1154 AB: 178; 150x: Very pretty pair, 2 Dm, closely separated around 3". WDS says proper motion indicates physical, but they do not share parallax ranges (-16%), so likely not binary.
07h 52m 08.46s -03° 03' 14.9" P.A. 353.00 sep 2.8 mag 7.13,9.26 Sp A5 dist. 111.98 pc (365.28 l.y.)
STF1157 AB: 178; 300x: Snowman, light yellow stars, significant delta magnitude. WDS says physical with 1448 year period, however they do not share parallax ranges (-43%), even though the lateral separation is 85 AU. This is not binary.
07h 54m 33.03s -02° 47' 44.9" P.A. 170.80 sep 0.7 mag 7.93,7.89 Sp F0
STF1183 AB: 178; 150x: Wide, 2 Dm. Other faint close pairings not seen. WDS uncertain, they share 10% of parallax ranges, but very far 8,454 AU weighted separation, 3.85+2.56 Msol, so there is some chance these could be binary.
08h 06m 27.42s -09° 14' 40.1" P.A. 328.00 sep 30.6 mag 6.22,7.77 Sp B9.5IV dist. 307.69 pc (1003.68 l.y.)
STF1189 AB: 178; 150x: White and 3 Dm wide B. WDS uncertain, but they share 10% parallax ranges, 4,625 AU weighted separation, and 3.66+2.01 Msol, so they could be binary.
08h 07m 56.30s -01° 20' 58.1" P.A. 334.00 sep 8.9 mag 7.82,10.08 Sp A1V dist. 1470.59 pc (4797.06 l.y.)
BU 196 AB: 178; 300x: Faint pairing, B is quite faint by comparison to A but only 1 Dm, around 3" separation, best seen with higher magnification. Discovered with 6-inch. WDS uncertain, but they share 30% of their parallax ranges, 2,269 AU weighted separation, 2.95+2.15 Msol, so these might be binary.
07h 12m 20.84s -05° 25' 53.8" P.A. 193.00 sep 3.1 mag 9.90,10.90 Sp A2
BU 197 AB: 178; 150x: Very fine, rather difficult, 2 Dm, <3" separation. Discovered with 6-inch. WDS uncertain, but with 44% parallax range overlap, 1,784 AU weighted separation, and large 4.81+3.17 Msol, they are likely binary.
07h 12m 49.38s -07° 08' 57.8" P.A. 148.00 sep 2.2 mag 7.82,9.34 Sp F2 dist. 699.3 pc (2281.12 l.y.)
BU 330 AB: 178; 150x: Extremely fine, with seeing only, 1 Dm, light orange stars, tough pair. Discovered with 6-inch. WDS uncertain, but they do not overlap parallax ranges (-34%), so are not binary.
07h 19m 33.10s -00° 54' 30.3" P.A. 214.00 sep 1.3 mag 8.75,9.83 Sp B8
BU 573 AB 178; 150x: Hairline split, 1 Dm, quite a pair. Discovered with 18.5-inch. WDS says physical with an 855-year period, but there is no EDR3 data for the secondary, so can't verify
07h 01m 49.89s -10° 52' 56.3" P.A. 316.00 sep 0.5 mag 7.16,7.83 Sp F8 dist. 118.34 pc (386.03 l.y.)
BU 583 AB: 178; 205x: Hairline split at low power, split at 205x, very nice near equal pair. Discovered with 18.5-inch. WDS uncertain, but 27% of the parallax ranges overlap, 775 AU weighted separation, and 2.4+2.2 Msol, so likely binary.
08h 09m 11.66s -06° 42' 08.0" P.A. 71.00 sep 1.8 mag 9.60,9.95 Sp G5
BU 903 AB: 178; 205x: Very faint B just resolved with seeing, very closely split. Discovered with 18.5-inch. WDS uncertain, but 95% of the parallax ranges overlap, only 521 AU weighted separation, and 2.6+1.8 Msol, so these are very probably binary.
08h 04m 14.08s -01° 51' 10.1" P.A. 34.00 sep 1.6 mag 8.21,9.81 Sp B9 dist. 323.62 pc (1055.65 l.y.)
BU 1279 AB: 158; 300x: Very tough, with seeing, unequal closely separation around 1". Discovered with 18.5-inch. WDS uncertain, but 5% of the parallax ranges overlap, only 879 AU weighted separation, and 3.1/2.7 Msol, so it is possible they are binary.
The Struves are a fun project and I'll make another set of SkyTools list just for them and the Burnhams, it should only take a year or two to polish them all off. I could do those on the mediocre nights and save the physicals for the best nights.
STF1029 AB: 178; 205x: Nice close split, <1 Dm, white stars. WDS uncertain, however there is strong parallax range overlap 79%, 337 AU weighted separation, and 2.47+2.21 Msol, so very likely these are binary.
07h 07m 56.87s -04° 40' 39.8" P.A. 27.00 sep 1.6 mag 7.47,7.95 Sp A9V dist. 225.23 pc (734.7 l.y.)
STF1003 AB: 178; 150x: Close pair, pretty faint near equal, well split around 4". WDS says proper motion indicates physical, and there is 6% parallax range overlap, 1,284 AU weighted separation, and 1.98+1.84 Msol.
06h 58m 34.62s -09° 10' 02.3" P.A. 321.00 sep 3.9 mag 9.57,9.92 Sp F2
STF1029 AB: 178; 205x: Nice close split, <1 Dm, white stars. WDS uncertain, however there is strong parallax range overlap 79%, 337 AU weighted separation, and 2.47+2.21 Msol, so very likely these are binary.
07h 07m 56.87s -04° 40' 39.8" P.A. 27.00 sep 1.6 mag 7.47,7.95 Sp A9V dist. 225.23 pc (734.7 l.y.)
STF1003 AB: 178; 150x: Close pair, pretty faint near equal, well split around 4". WDS says proper motion indicates physical, and there is 6% parallax range overlap, 1,284 AU weighted separation, and 1.98+1.84 Msol.
06h 58m 34.62s -09° 10' 02.3" P.A. 321.00 sep 3.9 mag 9.57,9.92 Sp F2
STF1015 AB: 178; 150x: Well split, near equal, white. WDS says parallax indicates physical, however their ranges do not overlap (-33%), so really these are not likely to be physical.
07h 04m 55.36s -05° 46' 28.4" P.A. 199.00 sep 4.9 mag 9.41,9.40 Sp A0
STF1028 AB: 178; 150x: Light orange A and wide, much fainter B, at the edge of a triangle-shaped open cluster (NGC 2343). WDS uncertain, and there is 32% parallax range overlap, a rather wide 11,464 AU weighted separation, but large 4.82+2.64 Msol -- so might be binary. SIMBAD shows the secondary as part of NGC 2343 (#11), but the primary, HD 54387, is not included as an NGC 2343 member; maybe the NGC count needs to be revised given the EDR3 parallax data?
07h 08m 16.08s -10° 37' 25.8" P.A. 304.00 sep 11.0 mag 8.59,11.10 Sp G5
STF1034 AB: 178; 150x: Close unequal pair, just split this low magnification. WDS says parallax indicates physical. It has 7% parallax range overlap, 281 AU weighted separation, 1.26/1.11 Msol, and the radial velocity delta (2.31) is less than the escape velocity (3.86), so it is binary.
07h 09m 21.70s -08° 18' 58.4" P.A. 10.00 sep 2.4 mag 9.43,9.89
STF1036 AB: 178; 150x: Wide 1 Dm. Not physical.
07h 10m 12.63s -06° 16' 42.9" P.A. 103.00 sep 17.4 mag 9.22,9.92 Sp F5
STF1043 AB: 178; 150x: Very fine, equal white stars, just split. WDS says parallax indicates physical, and they do overlap 84% of their parallax ranges, have 977 AU weighted separation, and equal 2.26 Msol, so likely binary
07h 12m 36.98s -00° 40' 46.4" P.A. 68.00 sep 2.4 mag 9.37,9.42 Sp A0
STF1045 AB: 178; 150x: Ice blue A and 2 Dm B, well separated. WDS says proper motion indicates non-physical. They don't share parallax ranges, -96%, so certainly not binary.
07h 12m 42.24s -03° 10' 41.0" P.A. 236.00 sep 5.6 mag 8.01,9.08 Sp F5 dist. 73.48 pc (239.69 l.y.)
STF1049 AB: 178; 150x: Close pair, 1 Dm, pretty pair in a rich field. WDS says not physical, and they don't share parallax ranges (-51%)
07h 13m 42.33s -08° 55' 31.0" P.A. 41.00 sep 3.6 mag 8.36,9.47 Sp B9.5V dist. 338.98 pc (1105.75 l.y.)
STF1056 AB: 178; 150x: White and 2 Dm, well separated in a rich field. WDS uncertain, however they share 79% of their parallax ranges, have a moderate 1,095 AU weighted separation, and 2.79+2.02 Msol, so these are likely binary.
07h 15m 34.34s -01° 51' 36.8" P.A. 299.00 sep 3.9 mag 8.04,8.88 Sp G0 dist. 246.91 pc (805.42 l.y.)
STF1060 AB: 178; 150x: Well split 1 Dm, white, and arc of faint stars nearby, in a rich field. WDS not physical, and they don't overlap parallax ranges, -20%
07h 16m 06.71s -09° 16' 10.9" P.A. 24.00 sep 6.9 mag 8.60,9.59 Sp B7V dist. 284.9 pc (929.34 l.y.)
STF1077 AB: 178; 150x: Faint near equal stars, well separated, and the C star appears with averted vision a little wider than the others, at 90-degrees difference in PA. WDS says physical, however they do not overlap parallax ranges (-10%), and the radial velocity delta (1.85) just exceeds the escape velocity (1.81), so these are not binary
07h 20m 59.96s -00° 40' 13.1" P.A. 319.00 sep 5.5 mag 9.89,9.78 Sp A3
STF1085 AB: 178; 150x: Nicely separated around 3", white A and 1 Dm B. WDS says not physical, but in fact they share 80% of their parallax ranges, have a small 785 AU weighted separation, and a healthy 2.10+1.57 Msol -- these are likely binary.
07h 24m 28.43s -04° 36' 30.3" P.A. 283.00 sep 3.2 mag 8.63,10.04 Sp A3
STF1045 AB: 178; 150x: Ice blue A and 2 Dm B, well separated. WDS says proper motion indicates non-physical. They don't share parallax ranges, -96%, so certainly not binary.
07h 12m 42.24s -03° 10' 41.0" P.A. 236.00 sep 5.6 mag 8.01,9.08 Sp F5 dist. 73.48 pc (239.69 l.y.)
STF1049 AB: 178; 150x: Close pair, 1 Dm, pretty pair in a rich field. WDS says not physical, and they don't share parallax ranges (-51%)
07h 13m 42.33s -08° 55' 31.0" P.A. 41.00 sep 3.6 mag 8.36,9.47 Sp B9.5V dist. 338.98 pc (1105.75 l.y.)
STF1056 AB: 178; 150x: White and 2 Dm, well separated in a rich field. WDS uncertain, however they share 79% of their parallax ranges, have a moderate 1,095 AU weighted separation, and 2.79+2.02 Msol, so these are likely binary.
07h 15m 34.34s -01° 51' 36.8" P.A. 299.00 sep 3.9 mag 8.04,8.88 Sp G0 dist. 246.91 pc (805.42 l.y.)
STF1060 AB: 178; 150x: Well split 1 Dm, white, and arc of faint stars nearby, in a rich field. WDS not physical, and they don't overlap parallax ranges, -20%
07h 16m 06.71s -09° 16' 10.9" P.A. 24.00 sep 6.9 mag 8.60,9.59 Sp B7V dist. 284.9 pc (929.34 l.y.)
STF1077 AB: 178; 150x: Faint near equal stars, well separated, and the C star appears with averted vision a little wider than the others, at 90-degrees difference in PA. WDS says physical, however they do not overlap parallax ranges (-10%), and the radial velocity delta (1.85) just exceeds the escape velocity (1.81), so these are not binary
07h 20m 59.96s -00° 40' 13.1" P.A. 319.00 sep 5.5 mag 9.89,9.78 Sp A3
STF1085 AB: 178; 150x: Nicely separated around 3", white A and 1 Dm B. WDS says not physical, but in fact they share 80% of their parallax ranges, have a small 785 AU weighted separation, and a healthy 2.10+1.57 Msol -- these are likely binary.
07h 24m 28.43s -04° 36' 30.3" P.A. 283.00 sep 3.2 mag 8.63,10.04 Sp A3
STF1109 AB: 178; 150x: Quite fine, white stars, near equal, nicely separated around 3". WDS says not physical, but they share 38% parallax overlap, 3,023 AU weighted separation, and healthy 3.57+3.60 Msol, and are likely binary
07h 31m 54.40s -00° 31' 30.9" P.A. 17.00 sep 3.1 mag 9.26,9.26 Sp A0
STF1133 AB: 178; 150x: Ice blue-white A and light orange B, brighter than 10th magnitude, around 1 Dm. WDS uncertain, but 68% of their parallax ranges overlap, 956 AU weighted separation, and 1.89+1.50 Msol, so they are likely binary.
07h 42m 34.02s -04° 01' 35.4" P.A. 108.00 sep 4.3 mag 8.88,9.96 Sp A5 dist. 152.21 pc (496.51 l.y.)
STF1152 AB: 178; 150x: 2 Dm, well split stars. WDS says not physical, but 5% of their parallax ranges overlap, 1,693 AU weighted separation, 2.48+1.59 Msol, and the radial velocity delta (0.5) is much less than the escape velocity (2.07), so they may be binary.
07h 50m 59.24s -03° 07' 15.6" P.A. 314.00 sep 6.0 mag 8.41,10.29 Sp G5 dist. 316.46 pc (1032.29 l.y.)
STF1154 AB: 178; 150x: Very pretty pair, 2 Dm, closely separated around 3". WDS says proper motion indicates physical, but they do not share parallax ranges (-16%), so likely not binary.
07h 52m 08.46s -03° 03' 14.9" P.A. 353.00 sep 2.8 mag 7.13,9.26 Sp A5 dist. 111.98 pc (365.28 l.y.)
STF1157 AB: 178; 300x: Snowman, light yellow stars, significant delta magnitude. WDS says physical with 1448 year period, however they do not share parallax ranges (-43%), even though the lateral separation is 85 AU. This is not binary.
07h 54m 33.03s -02° 47' 44.9" P.A. 170.80 sep 0.7 mag 7.93,7.89 Sp F0
08h 06m 27.42s -09° 14' 40.1" P.A. 328.00 sep 30.6 mag 6.22,7.77 Sp B9.5IV dist. 307.69 pc (1003.68 l.y.)
STF1189 AB: 178; 150x: White and 3 Dm wide B. WDS uncertain, but they share 10% parallax ranges, 4,625 AU weighted separation, and 3.66+2.01 Msol, so they could be binary.
08h 07m 56.30s -01° 20' 58.1" P.A. 334.00 sep 8.9 mag 7.82,10.08 Sp A1V dist. 1470.59 pc (4797.06 l.y.)
BU 196 AB: 178; 300x: Faint pairing, B is quite faint by comparison to A but only 1 Dm, around 3" separation, best seen with higher magnification. Discovered with 6-inch. WDS uncertain, but they share 30% of their parallax ranges, 2,269 AU weighted separation, 2.95+2.15 Msol, so these might be binary.
07h 12m 20.84s -05° 25' 53.8" P.A. 193.00 sep 3.1 mag 9.90,10.90 Sp A2
BU 197 AB: 178; 150x: Very fine, rather difficult, 2 Dm, <3" separation. Discovered with 6-inch. WDS uncertain, but with 44% parallax range overlap, 1,784 AU weighted separation, and large 4.81+3.17 Msol, they are likely binary.
07h 12m 49.38s -07° 08' 57.8" P.A. 148.00 sep 2.2 mag 7.82,9.34 Sp F2 dist. 699.3 pc (2281.12 l.y.)
BU 330 AB: 178; 150x: Extremely fine, with seeing only, 1 Dm, light orange stars, tough pair. Discovered with 6-inch. WDS uncertain, but they do not overlap parallax ranges (-34%), so are not binary.
07h 19m 33.10s -00° 54' 30.3" P.A. 214.00 sep 1.3 mag 8.75,9.83 Sp B8
BU 573 AB 178; 150x: Hairline split, 1 Dm, quite a pair. Discovered with 18.5-inch. WDS says physical with an 855-year period, but there is no EDR3 data for the secondary, so can't verify
07h 01m 49.89s -10° 52' 56.3" P.A. 316.00 sep 0.5 mag 7.16,7.83 Sp F8 dist. 118.34 pc (386.03 l.y.)
08h 09m 11.66s -06° 42' 08.0" P.A. 71.00 sep 1.8 mag 9.60,9.95 Sp G5
BU 903 AB: 178; 205x: Very faint B just resolved with seeing, very closely split. Discovered with 18.5-inch. WDS uncertain, but 95% of the parallax ranges overlap, only 521 AU weighted separation, and 2.6+1.8 Msol, so these are very probably binary.
08h 04m 14.08s -01° 51' 10.1" P.A. 34.00 sep 1.6 mag 8.21,9.81 Sp B9 dist. 323.62 pc (1055.65 l.y.)
BU 1279 AB: 158; 300x: Very tough, with seeing, unequal closely separation around 1". Discovered with 18.5-inch. WDS uncertain, but 5% of the parallax ranges overlap, only 879 AU weighted separation, and 3.1/2.7 Msol, so it is possible they are binary.
07h 10m 24.09s -04° 05' 45.4" P.A. 12.00 sep 1.2 mag 9.33,9.74 Sp B9
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