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Doubles in session


Current system
15549+3422
STT 302 AB
HD 142742


Nearby doubles
33' : 15531+3445
LDS6309AB

34' : 15523+3415
LDS5848AB

35' : 15575+3434
LDS 983AB

36' : 15527+3444
HEI 789

40' : 15544+3500
COU 978

44' : 15583+3409
LDS4615

47' : 15532+3341
UC 3077

48' : 15512+3431
TDS9662

51' : 15555+3512
MCT 9

52' : 15550+3514
CVR 175

60' : 15503+3437
LDS4593

61' : 15505+3401
COU 977

62' : 15572+3327
TDS9702

64' : 15503+3449
A 1858

72' : 15496+3449
BWL 41

73' : 15568+3530
HJ 577

76' : 15495+3456
TDS9645

76' : 15520+3528
STF1983

85' : 15524+3303
KPP2107

91' : 15512+3539
BUP 163

100' : 16010+3318
S 676

101' : 15569+3244
COU 803

101' : 15586+3552
TDS9707

106' : 15569+3604
HJ 258

106' : 15504+3552
SLW1141

114' : 15569+3613
SPN 1



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

15549+3422 STT 302 AB (HD 142742)

 
 
15h 54m 56.85s +34° 21' 45.0" P.A. 51.00 sep 27.9 mag 7.16,10.42 Sp A3V dist. 183.82 pc (599.62 l.y.)
 
 
Coord 2000 15549+3422 Discov num STT 302 Comp AB Coord arcsec 2000 15 54 56.85 +34 21 45.0
Date first 1843 Date last 2017 Obs 29
Pa first 54 Pa last 50.5 P.A. Now (θ) 50.5°
Sep first 28.6 Sep last 27.9 Sep. Now (ρ) 27.9"
Mag pri 7.16 Mag sec 10.42 delta mag (ΔM) 3.26 Spectral class A3V (white)
Pri motion ra -006 Sec motion ra -015
Pri motion dec +005 Sec motion dec +009
Notes
rPM=0.563
Nature of this double is uncertain.
 
 
15549+3422 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 142742 64970 15 54 57 +34 21 45 STT 302 AB 2017 29 51 27.9 7.16 10.42 3.26 <===
Show 64970 15 54 57 +34 21 45 WAL 68 AC 2015 9 358 65.3 7.14 12.92 5.78
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 142742 Constellation Corona Borealis SAO 64970 HIP 77933
Tycho2 2575-01509-1 Gaia DR2 1371690959524666496 HD 142742 GC 21385
BD BD+34 2709 Distance 183.82 Distance ly 599.62
 
 
WDS 15549+3422 STT 302 AB (HD 142742) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
STTA (O. Struve DD - Appendix list) ...................
Stt1864 Ma - Struve, O. 1864MNRAS..24..149S
Stt1864 MNRAS 24, 149, 1864
Stt1866 orb - Struve, O. .
Stt1866 Bull. Imp. Acad. Sci. St. Petersburg, 1866
Stt1874 orb - Struve, O. .
Stt1874 Compte Rendus 79, 1467, 1874
Stt1875 orb - Struve, O. 1875MNRAS..35..367S
Stt1875 MNRAS 35, 367, 1875
Stt1878 Ma - Struve, O. 1878ObPul...9....1S
Stt1878 Pulkova Observations 9, 1, 1878
Stt1879A Ma - Struve, O. 1879Obs.....2..304G
Stt1879A cited by Gledhill (Obs 2, 304, 1879)
Stt1879B Ma - Struve, O. 1879Obs.....3..245G
Stt1879B cited by Gledhill (Obs 3, 245, 1879)
Stt1879C Ma - Struve, O. 1879Obs.....2..344G
Stt1879C cited by Gledhill (Obs 2, 344, 1879)
Stt1880A Ma - Struve, O. 1880Obs.....2..605H
Stt1880A cited by Hunt (Obs. 3, 605, 1880)
Stt1880B Ma - Struve, O. 1880Obs.....3..535G
Stt1880B cited by Gledhill (Obs 3, 535, 1880)
Stt1880C Ma - Struve, O. 1880MNRAS..40..497B
Stt1880C cited by Burnham (MNRAS 40, 497, 1880)
Stt1884A Ma - Struve, O. 1884AReg...22..216S
Stt1884A cited by Sadler (Astr. Register 22, 216, 1884)
Stt1893a Ma j Struve, O. 1893ObPul..10....1S
Stt1893a Pulkova Obs. Observations 10, 1, 1893
Stt1906A Ma - Struve, O. 1906MmRAS..56....1L
Stt1906A cited by Lewis (MemRAS 56, 1, 1906)
Stt1906B Ma j Struve, O. 1906QB821.B972.....
Stt1906B cited in BDS (Burnham Double Star Cat., 1906)
Stt1908A Ma - Struve, O. 1908MNRAS..68..465B
Stt1908A cited by Barnard (MNRAS 68, 465, 1908)
Stt1913A Ma - Struve, O. 1913QB811.B8.......
Stt1913A cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Stt1914A Ma - Struve, O. 1914AN....198..107R
Stt1914A cited by Rabe (AN 198, 107, 1914)
Stt1932A Ma - Struve, O. 1932QB821.A43......
Stt1932A cited in ADS (Aitken Double Star Cat., 1932)
Wal1934 Ma j Wallenquist, A. 1934AnBos...6....3W
Wal1934 Ann. Bosscha Obs. Lembang 6, Pt.2, 1934
Wal1944a Zw - Wallenquist, A. 1954MeUpp...85.....
Wal1944a Medd. Uppsala Obs. #85, 1944
Wal1944a (Visual measures with wedge photometer attached to 14-inch refractor. No dates
Wal1944a given for measures; default date = decade of publication added.)
Wal1944b Zw - Wallenquist, A. 1954MeUpp...87.....
Wal1944b Medd. Uppsala Obs. #87, 1944
Wal1944b (Visual measures with wedge photometer attached to 14-inch refractor. No dates
Wal1944b given for measures; default date = decade of publication added.)
Wal1947 Zw - Wallenquist, A. 1947UppAn...2....2W
Wal1947 Ann. Uppsala Astron. Obs. 2, No.2, 1947
Wal1947 (A catalogue containing results of the two prior series, plus additional measures
Wal1947 with the 14-inch refractor and wedge photometer)
Wal1948 Zw - Wallenquist, A. 1948UppAn...2....3W
Wal1948 Ann. Uppsala Astron Obs. 2, #3, 1948
Wal1948 (Visual measures of southern double stars made with 17-inch refractor of La Plata
Wal1948 and wedge photometer. No dates listed; default date = decade of publication added)
Wal1950 Zd - Wallenquist, A. 1950MeUpp..103.....
Wal1950 Medd. Uppsala Obs. #103, 1950
Wal1954 Zw - Wallenquist, A. 1954UppAn...4Q....W
Wal1954 Ann. Uppsala Astron Obs. 4, #2, 1954
Wal1954 ("General Catalogue of Differences in Magnitude of Double Stars". Weighted mean
Wal1954 values from numerous sources)
Wal1958 Zw - Wallenquist, A. 1958MeUpp..118.....
Wal1958 Medd. Uppsala Obs. #118, 1958
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
15549+3422 STT 302 AB 2005 17 51 28.6 7.16 10.42 A3V D 155456.85+342145.0
15549+3422 STT 302 AB 2008 18 51 29.6 7.16 10.42 A3V D 155456.85+342145.0
15549+3422 STT 302 AB 2012 21 50 29.0 7.16 10.42 A3V D 155456.85+342145.0
15549+3422 STT 302 AB 2015 24 51 28.6 7.16 10.42 A3V 155456.85+342145.0
15549+3422 STT 302 AB 2017 29 51 27.9 7.16 10.42 A3V 155456.85+342145.0

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 15549+3422 STT 302 AB (HD 142742) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 15549+3422 STT 302 AB (HD 142742) : MEASURES
 
 
No records found.

 
 
WDS 15549+3422 (HD 142742) : VIRTUAL EYEPIECE
 
 

15549+3422 STT 302A mag 7.16 Sp A3V 15549+3422 STT 302B sep 25.1 P.A. 45.00 mag 10.42 15549+3422 WAL 68C sep 65.3 P.A. 358.50 mag 12.92 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 15549+3422 (HD 142742) : ALADIN DSS IMAGE @ 15h 54m 56.85s +34° 21' 45.0"
 
 
 
 
WDS 15549+3422 STT 302 AB (HD 142742) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

15549+3422 STT 302AB distance=0' 15531+3445 LDS6309AB distance=33' 15531+3445 RAO 340Aa,Ab distance=33' 15523+3415 LDS5848AB distance=34' 15523+3415 NSN 672Aa,Ab distance=34' 15575+3434 LDS 983AB distance=35' 15575+3434 LMP 12AC distance=35' 15527+3444 HEI 789 distance=36' 15544+3500 COU 978 distance=40' 15583+3409 LDS4615 distance=44' 15532+3341 UC 3077 distance=47' 15512+3431 TDS9662 distance=48' 15555+3512 MCT 9 distance=51' 15550+3514 CVR 175 distance=52' 15503+3437 LDS4593 distance=60' 15505+3401 COU 977 distance=61' 15572+3327 TDS9702 distance=62' 15503+3449 A 1858 distance=64' 15496+3449 BWL 41 distance=72' 15568+3530 HJ 577 distance=73' 15495+3456 TDS9645 distance=76' 15520+3528 STF1983 distance=76' 15524+3303 KPP2107 distance=85' 15512+3539 BUP 163 distance=91' 16010+3318 S 676 distance=100' 15569+3244 COU 803 distance=101' 15586+3552 TDS9707 distance=101' 15569+3604 HJ 258 distance=106' 15504+3552 SLW1141 distance=106' 15569+3613 SPN 1 distance=114' 15575+3231 HJ 578 distance=116' 16043+3408 KPP3979 distance=117' 15478+3301 HDS2225 distance=121' 15576+3225 TOK 304 distance=122' 15464+3531 LDS4591 distance=127' 15488+3241 COU 801 distance=129' 15596+3618 TDS9715 distance=130' 16024+3554 TDS 797 distance=131' 15503+3224 HJ 574AB distance=131' 15503+3224 HJ 574AC distance=131' 15518+3211 LDS4596 distance=137' 15473+3604 CRB 112 distance=140' 16001+3625 COU1138 distance=140' 16059+3500 LEP 77 distance=141' 15448+3534 PRT 5 distance=145' 15588+3205 GRV 918 distance=145' 16067+3406 DEA 55 distance=147' 16027+3617 KPP3978 distance=150' 15501+3639 ALI 369 distance=150' 15440+3526 HJ 572 distance=150' 15505+3644 CVR1647 distance=153' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 15549+3422 STT 302 AB 51 27.9
Show 15549+3422 WAL 68 AC 358 65.3
Show 15531+3445 LDS6309 AB 173 26.7 33
Show 15531+3445 RAO 340 Aa,Ab 305 0.4 33
Show 15523+3415 LDS5848 AB 54 32.5 34
Show 15523+3415 NSN 672 Aa,Ab 107 1.8 34
Show 15575+3434 LDS 983 AB 265 186.8 35
Show 15575+3434 LMP 12 AC 262 89.1 35
Show 15527+3444 HEI 789 113 2.7 36
Show 15544+3500 COU 978 149 1.9 40
Show 15583+3409 LDS4615 353 43.8 44
Show 15532+3341 UC 3077 96 33.8 47
Show 15512+3431 TDS9662 195 0.6 48
Show 15555+3512 MCT 9 247 1.6 51
Show 15550+3514 CVR 175 163 75.6 52
Show 15503+3437 LDS4593 350 4.6 60
Show 15505+3401 COU 977 185 3.3 61
Show 15572+3327 TDS9702 116 1.1 62
Show 15503+3449 A 1858 283 0.4 64
Show 15496+3449 BWL 41 99 0.2 72
Show 15568+3530 HJ 577 13 9.4 73
Show 15495+3456 TDS9645 337 0.4 76
Show 15520+3528 STF1983 64 14.1 76
Show 15524+3303 KPP2107 264 17.0 85
Show 15512+3539 BUP 163 209 106.3 91
Show 16010+3318 S 676 47 141.4 100
Show 15569+3244 COU 803 217 1.6 101
Show 15586+3552 TDS9707 188 1.2 101
Show 15569+3604 HJ 258 253 16.6 106
Show 15504+3552 SLW1141 125 8.5 106
Show 15569+3613 SPN 1 87 25.6 114
Show 15575+3231 HJ 578 163 10.1 116
Show 16043+3408 KPP3979 148 1.7 117
Show 15478+3301 HDS2225 327 0.3 121
Show 15576+3225 TOK 304 219 256.4 122
Show 15464+3531 LDS4591 210 28.0 127
Show 15488+3241 COU 801 196 1.5 129
Show 15596+3618 TDS9715 121 2.4 130
Show 16024+3554 TDS 797 86 0.9 131
Show 15503+3224 HJ 574 AB 94 15.8 131
Show 15503+3224 HJ 574 AC 96 76.4 131
Show 15518+3211 LDS4596 40 114.8 137
Show 15473+3604 CRB 112 166 14.7 140
Show 16001+3625 COU1138 340 0.2 140
Show 16059+3500 LEP 77 233 42.6 141
Show 15448+3534 PRT 5 44 4.5 145
Show 15588+3205 GRV 918 347 14.0 145
Show 16067+3406 DEA 55 297 15.4 147
Show 16027+3617 KPP3978 130 2.2 150
Show 15501+3639 ALI 369 338 8.2 150
Show 15440+3526 HJ 572 275 21.6 150

 
 
WDS 15549+3422 : COMPONENTS
 
 
  A B
B pa=45.0°
sep=25.11"
 
C pa=358.5°
sep=65.30"
pa=337.7°
sep=51.36"
 
 
15549+3422 A
 
 
Name HD 142742 Coord arcsec 2000 155456.85+342145.0 Mag 7.16 Spectral class A3V (white)
PmRA -6.00 PmDE 5.0 SAO 64970 HIP 77933
Tycho2 2575-01509-1 HD 142742 GC 21385 BD BD+34 2709
Tycho2
Tycho2 2575-01509-1 Pflag RAmdeg 238.73681971 DEmdeg 34.36252950
PmRA -15.2 PmDE 8.9 E RAmdeg 4 E DEmdeg 4
E pmRA 1.1 E pmDE 1.3 EpRAm 1991.24 EpDEm 1991.48
Num 16 Q RAmdeg 1.2 Q DEmdeg 1.0 Q pmRA 1.5
Q pmDE 0.9 BTmag 7.303 E BTmag 0.015 VTmag 7.138
E VTmag 0.010 Prox 999 TYC T HIP 77933
CCDM RAdeg 238.73686278 DEdeg 34.36250889 EpRA 1990 1.55
EpDE 1990 1.72 E RAdeg 4.3 E DEdeg 3.9 Posflg
Corr -0.2
SAO
SAO 64970 DelFlag RA1950 PmRA1950 -0.0011
DE1950 PmDE1950 0.002 Vmag 7 SpType A2
Double code Source 70 CatNum 21385 DM BD+34 2709
DMcomp BDsup HD 142742 M HD 0
GC 21385 RA1950rad 4.15840633 DE1950rad 0.60227379 PmRA2000 -0.0008
PmDE2000 0.005
Hipparcos
Catalog H HIP 77933 Proxy RAhms 15 54 56.85
DEdms +34 21 45.0 Vmag 7.12 VarFlag R Vmag H
RAdeg 238.737 DEdeg 34.3625 AstroRef Plx 6.64
CCDM 15550+3422 N CCDM I Nsys 1 Ncomp 1
MultFlag G Source Qual M HIP
Theta Rho HD 142742 BD BD+34 2709
CD CP Dm number +34 2709 VIred 0.14
SpType A2 R SpType Coord arcsec 2000 155456.85+342145.0
Hipparcos 2
HIP 77933 Sn 7 So 1 Nc 1
RArad 4.1667443381 DErad 0.5997389639 Plx 5.44 PmRA -6
PmDE 4.75 E RArad 0.48 E DErad 0.54 E Plx 0.66
E pmRA 0.6 E pmDE 0.66 Hpmag 7.1754 E Hpmag 0.001
SHp 0.011 VA 0 BV 0.159 E BV 0.008
VI 0.18
 
 
15549+3422 B
 
 
Coord arcsec 2000 155458.29+342202.7 Mag 10.42 PmRA -15.00 PmDE 9.0
Calc delta mag 3.26 Calc coord yes
 
 
15549+3422 C
 
 
Coord arcsec 2000 155456.71+342250.3 Mag 12.92 PmRA -2.00 PmDE 1.0
Calc delta mag 5.76 Calc coord yes