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Doubles in session


Current system
19406+6240
STF2574


Nearby doubles
10' : 19412+6249
LDS2778

34' : 19396+6207
LDS2777

42' : 19377+6203
STI 907

43' : 19397+6158
TDT1611

44' : 19468+6238
BVD 334

45' : 19343+6250
ES 1848

46' : 19374+6319
CVR 216

46' : 19341+6232
LDS2772

46' : 19470+6253
LDS2781

49' : 19391+6153
LDS2776

51' : 19386+6329
HDS2787

52' : 19449+6158
STI 917

54' : 19344+6313
STI 902

57' : 19480+6304
STI 926

63' : 19334+6203
STF2553

66' : 19494+6306
LDS2782

67' : 19476+6154
UC 4024

68' : 19376+6344
MLR 56AB

69' : 19486+6200
STI 927

72' : 19388+6129
LDS2775

74' : 19370+6350
STF2564

75' : 19312+6319
BU 655AB

75' : 19299+6300
ES 1847

76' : 19479+6145
STI 925

80' : 19303+6207
HU 947

84' : 19523+6222
VBS 29AB



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.

19406+6240 STF2574

 
 
19h 40m 34.80s +62° 39' 53.4" P.A. 98.10 sep 0.5 mag 7.73,8.91 Sp F8V dist. 128.53 pc (419.26 l.y.)
 
 
Coord 2000
19406+6240
 Discov num
STF2574
 Comp
Coord arcsec 2000
19 40 34.80 +62 39 53.4
Date first
1831
 Date last
2020
 Obs
98
Pa first
314
 Pa last
94
 P.A. Now (θ)
98.1°
Sep first
1.5
 Sep last
0.6
 Sep. Now (ρ)
0.54"
Mag pri
7.73
 Mag sec
8.91
 delta mag (ΔM)
1.18
 Spectral class
F8V (yellow-white)
Pri motion ra
+026
 Sec motion ra
+026
Pri motion dec
+111
 Sec motion dec
+111
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
93.8
 Precise sep
0.61
 Constellation
Draco
 SAO
18469
HIP
96796
 Tycho2
4234-01631-1
 HD
186453
 ADS
12803
BD
BD+62 1747
 Distance
128.53
 Distance ly
419.26
 last precise pa
93.8
last precise sep
0.61
 
 
ORBITAL ELEMENTS
 
 
Period (P)685.13y Periastron (T)2057.26y Semi-major axis (a)1.302a
Eccentricity (e)0.67 Inclination (i)78.9° Longitude of periastron (ω)48.2°
Node (Ω)107.6° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1999
label rho theta
2000 0.467 87.8
2001 0.472 88.4
2002 0.477 89.0
2003 0.481 89.5
2004 0.486 90.1
2005 0.491 90.6
2006 0.495 91.1
2007 0.499 91.7
2008 0.503 92.2
2009 0.507 92.7
2010 0.511 93.2
2011 0.515 93.6
2012 0.519 94.1
2013 0.522 94.6
2014 0.526 95.0
2015 0.529 95.5
2016 0.532 96.0
2017 0.535 96.4
2018 0.538 96.8
2019 0.540 97.3
2020 0.542 97.7
2021 0.544 98.1
2022 0.546 98.6
2023 0.547 99.0
2024 0.549 99.4
2025 0.549 99.8
2026 0.550 100.3
2027 0.550 100.7
2028 0.550 101.1
2029 0.550 101.5
2030 0.549 102.0


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds19406%2B6240a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19406+6240 STF2574 1999 91 88 0.5 7.73 8.91 F8V D 194034.80+623953.4
19406+6240 STF2574 2007 93 88 0.5 7.73 8.91 F8V OD 194034.80+623953.4
19406+6240 STF2574 2009 94 90 0.5 7.73 8.91 F8V OD 194034.80+623953.4
19406+6240 STF2574 2016 96 94 0.6 7.73 8.91 F8V O 194034.80+623953.4
19406+6240 STF2574 2018 97 97 0.5 7.73 8.91 F8V O 194034.80+623953.4

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