04256+1556 FIN 342 Aa,Ab
04h 25m 37.25s +15° 56' 27.9" P.A. 157.00 sep 0.1 mag 7.74,7.00 Sp F7V dist. 47.17 pc (153.87 l.y.)
Coord 2000 |
04256+1556 |
|
Discov num |
FIN 342 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
04 25 37.25 +15 56 27.9 |
|
Date first |
1959 |
|
Date last |
2021 |
|
Obs |
98 |
|
Pa first |
148 |
|
Pa last |
157 |
|
P.A. Now (θ) |
129.1° |
|
Sep first |
0.1 |
|
Sep last |
0.09 |
|
Sep. Now (ρ) |
0.096" |
|
Mag pri |
7.74 |
|
Mag sec |
7.00 |
|
delta mag (ΔM) |
0.74 |
|
Spectral class |
F7V (yellow-white) |
|
Pri motion ra |
+108 |
|
Sec motion ra |
|
|
Pri motion dec |
-026 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
04256+1556 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
93925 |
04 25 37 +15 56 28 |
FIN 342 Aa,Ab |
2021 |
98 |
157 |
0.1 |
7.74 |
7.00 |
0.74 |
Y |
<=== |
Show |
70 Tau |
93925 |
04 25 37 +15 56 28 |
BUP 57 AB |
2015 |
8 |
339 |
129.5 |
6.45 |
13.39 |
6.94 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Taurus |
|
SAO |
93925 |
|
HIP |
20661 |
|
Tycho2 |
1265-01171-1 |
|
Gaia DR2 |
3312783561888068352 |
|
HD |
27991 |
|
HR |
1391 |
|
GC |
5356 |
|
BD |
BD+15 621 |
|
Flamsteed |
70 Tauri |
|
Flamsteed name |
70 Tau |
|
Distance |
47.17 |
|
Distance ly |
153.87 |
|
ORBITAL ELEMENTS
Period (P) | 6.28y | |
Periastron (T) | 1988.7y | |
Semi-major axis (a) | 0.105a | |
Eccentricity (e) | 0.73 | |
Inclination (i) | 122° | |
Longitude of periastron (ω) | 271° | |
Node (Ω) | 215° | |
Notes | n | |
Reference | Sod1999 | |
Equinox | 2000 | |
Last observation | | |
Grade | 1 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
76.1 |
0.091 |
2001 |
35.1 |
0.050 |
2002 |
188.2 |
0.079 |
2003 |
158.5 |
0.093 |
2004 |
133.0 |
0.096 |
2005 |
108.4 |
0.097 |
2006 |
83.5 |
0.094 |
2007 |
52.3 |
0.072 |
2008 |
200.3 |
0.066 |
2009 |
166.0 |
0.091 |
2010 |
140.0 |
0.095 |
2011 |
115.2 |
0.097 |
2012 |
90.6 |
0.096 |
2013 |
63.0 |
0.083 |
2014 |
223.0 |
0.040 |
2015 |
173.9 |
0.088 |
2016 |
147.1 |
0.095 |
2017 |
122.1 |
0.096 |
2018 |
97.6 |
0.096 |
2019 |
71.6 |
0.089 |
2020 |
9.0 |
0.027 |
2021 |
182.6 |
0.083 |
2022 |
154.3 |
0.094 |
2023 |
129.1 |
0.096 |
2024 |
104.5 |
0.097 |
2025 |
79.4 |
0.093 |
2026 |
44.0 |
0.061 |
2027 |
192.9 |
0.074 |
2028 |
161.7 |
0.093 |
2029 |
136.0 |
0.096 |
2030 |
111.3 |
0.097 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
WDS 04256+1556 FIN 342 Aa,Ab : NOTES
discov_num |
notes |
refcode |
FIN 342 |
Aa,Ab: Hyad (vB 57). HR 1391 = 70 Tau. |
|
|
Combined spectroscopic/astrometric solution. Orbital parallax 0.02144 |
Trr1997b |
|
+/- 0.00067, masses 1.363 +/= 0.073 and 1.253 +/- 0.075 Msun. |
|
|
Quadrant determinations made at several epochs by McAlister et al. |
McA1988 |
|
(1988) have shown that this system is best represented by an eccentric |
|
|
orbit of period 6.3 years, rather than a circular 13-year orbit. |
|
|
1977.7421 Theta was incorrectly given as 6.0 degrees by McAlister & |
|
|
Fekel 1980). |
McA1980b |
|
This resolved spectroscopic binary (with P = 6.28 yr) is discussed by |
McA1988 |
|
McAlister et al. (1988) and by Dombrowski (1991). |
Dmb1991 |
|
The published measure for 1988.6582 (McAlister et al. 1990) is |
McA1990 |
|
is spurious. The data leading to this measure are actually the same as |
|
|
those for HR 1331 (= McA 14) for the same epoch. These two stars were |
|
|
observed in immediate sequence but with different microscope |
|
|
objectives, and the final reductions calculated two results from the |
|
|
same data set, but with different scale factors; the HR 1331 measure |
|
|
for 1988.6582 is the correct one. Reanalysis of the correct data for |
|
|
FIN 342 gives the 25 mas result shown here. Peterson (1992, private |
|
|
communication) pointed out the inconsistency of our originally |
|
|
published measure with respect to our previous orbital analysis of |
|
|
this Hyades binary (McAlister et al. 1988). |
Hrt1992b |
|
Pourbaix gives combined solution for this resolved SB2, yielding |
|
|
orbital parallaxes and component masses. |
Pbx2000b |
|
Aa,Ab : New spectroscopic solution determined by Griffin. |
Grf2012b |
|
Aa,Ab: Malkov et al. (2012) derive dynamical, photometric, and |
|
|
spectroscopic masses 2.50 +/- 0.47, 2.48, and 1.13 Msun, respectively. |
Mlk2012 |
REFERENCES
refcode |
metd |
author |
reference |
Dmb1991 |
- |
Dombrowski, E.G. |
. |
Dmb1991 |
|
PhD thesis, Georgia State Univ., 1991 |
|
Grf2012b |
not - |
Griffin, R.F. |
2012JApA...33...29G |
Grf2012b |
|
J Astrophys Astron 33, 29, 2012 |
|
Hrt1992b |
Sc j |
Hartkopf, W.I., McAlister, H.A., & Franz, O.G. |
1992AJ....104..810H |
Hrt1992b |
|
AJ 104, 810, 1992 |
|
McA1980b |
Sc j |
McAlister, H.A. & Fekel, F.C. |
1980ApJS...43..327M |
McA1980b |
|
ApJS 43, 327, 1980 |
|
McA1988 |
orb - |
McAlister, H.A., Hartkopf, W.I., Bagnuolo, W.G., Sowell, J.R., Franz, O.G., & |
1988AJ.....96.1431M |
McA1988 |
+S |
Evans, D.S. |
|
McA1988 |
|
AJ 96, 1431, 1988 |
|
McA1990 |
Sc j |
McAlister, H.A., Hartkopf, & Franz, O.G. |
1990AJ.....99..965M |
McA1990 |
|
AJ 99, 965, 1990 |
|
Mlk2012 |
not - |
Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. |
2012A&A...546A..69M |
Mlk2012 |
|
A&A 546, A69, 2012 |
|
Pbx2000b |
orb - |
Pourbaix, D. |
2000A&AS..145..215P |
Pbx2000b |
|
A&AS 145, 215, 2000 |
|
Sod1999 |
orb - |
Soderhjelm, S. |
1999A&A...341..121S |
Sod1999 |
|
A&A 341, 121, 1999 |
|
Trr1997b |
orb - |
Torres, G., Stefanik, R.P., & Latham, D.W. |
1997ApJ...479..268T |
Trr1997b |
|
ApJ 479, 268, 1997 |
|
Trr1997b |
orb - |
Torres, G., Stefanik, R., & Andersen, J., Nordstrom, B., Latham, D., & Clausen, J. |
1997AJ....114.2764T |
Trr1997b |
|
AJ 114, 2764, 1997 |
|
DISCOVERER
idgroup |
discov |
author |
1 |
BUP |
Burnham proper motion stars (see Burnham, Carnegie Inst. Wash. #168, 1913) |
1 |
FIN |
Finsen, W.S. |
WDS HISTORIC DATA
coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
04256+1556 |
FIN 342 |
Aa,Ab |
2004 |
79 |
287 |
0.1 |
7.74 |
7.00 |
F7V |
NOD |
042537.25+155627.9 |
04256+1556 |
FIN 342 |
Aa,Ab |
2008 |
80 |
170 |
0.1 |
7.74 |
7.00 |
F7V |
NOD |
042537.25+155627.9 |
04256+1556 |
FIN 342 |
Aa,Ab |
2014 |
88 |
178 |
0.1 |
7.74 |
7.00 |
F7V |
NOD |
042537.25+155627.9 |
04256+1556 |
FIN 342 |
Aa,Ab |
2016 |
94 |
119 |
0.1 |
7.74 |
7.00 |
F7V |
NO |
042537.25+155627.9 |
04256+1556 |
FIN 342 |
Aa,Ab |
2018 |
96 |
71 |
0.1 |
7.74 |
7.00 |
F7V |
NO |
042537.25+155627.9 |
04256+1556 |
FIN 342 |
Aa,Ab |
2021 |
98 |
157 |
0.1 |
7.74 |
7.00 |
F7V |
NO |
042537.25+155627.9 |
If you need more information about this double, apply for a
data request form to the WDS.
WDS 04256+1556 FIN 342 Aa,Ab : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 04256+1556 FIN 342 Aa,Ab : MEASURES
No records found.
WDS 04256+1556 : VIRTUAL EYEPIECE
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
|
|
WDS 04256+1556 : ALADIN DSS IMAGE @ 04h 25m 37.25s +15° 56' 27.9"
WDS 04256+1556 FIN 342 Aa,Ab : NEIGHBORHOODS
|
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 |
|
04256+1556 |
FIN 342 |
Aa,Ab |
157 |
0.1 |
|
Show |
|
04256+1556 |
BUP 57 |
AB |
339 |
129.5 |
|
Show |
|
04251+1559 |
LDS5554 |
|
277 |
4.4 |
9 |
Show |
|
04248+1552 |
HDS 566 |
Aa,Ab |
317 |
0.2 |
13 |
Show |
|
04248+1552 |
GWP 582 |
AB |
312 |
187.9 |
13 |
Show |
|
04248+1552 |
TOK 246 |
AC |
277 |
287.5 |
13 |
Show |
|
04248+1552 |
TOK 246 |
AD |
271 |
939.3 |
13 |
Show |
|
04248+1552 |
TOK 246 |
AE |
15 |
999.9 |
13 |
Show |
|
04248+1552 |
TOK 246 |
AF |
247 |
999.9 |
13 |
Show |
|
04248+1552 |
TOK 246 |
AG |
138 |
999.9 |
13 |
Show |
|
04263+1537 |
BUP 59 |
AB |
154 |
130.9 |
23 |
Show |
|
04263+1537 |
DRS 38 |
AC |
147 |
10.4 |
23 |
Show |
|
04263+1537 |
OCC9089 |
Aa,Ab |
-1 |
0.0 |
23 |
Show |
|
04248+1552 |
PAT 7 |
GH |
281 |
0.2 |
26 |
Show |
|
04238+1539 |
LDS2231 |
|
132 |
6.1 |
33 |
Show |
|
04242+1623 |
MET 38 |
|
257 |
2.1 |
34 |
Show |
|
04237+1538 |
MET 3 |
AB |
237 |
15.4 |
34 |
Show |
|
04234+1546 |
TOK 876 |
|
63 |
1.2 |
34 |
Show |
|
04255+1631 |
LDS2234 |
|
44 |
25.0 |
36 |
Show |
|
04268+1525 |
LDS2236 |
|
237 |
78.1 |
36 |
Show |
|
04271+1626 |
LDS2240 |
|
127 |
3.1 |
37 |
Show |
|
04271+1523 |
LDS2241 |
|
348 |
43.3 |
40 |
Show |
|
04287+1552 |
MCA 15 |
Ba,Bb |
351 |
0.2 |
43 |
Show |
|
04287+1552 |
BPMA 7 |
BC |
75 |
268.3 |
43 |
Show |
Chamukuy |
04287+1552 |
MKT 13 |
Aa,Ab |
334 |
0.0 |
45 |
Show |
Chamukuy |
04287+1552 |
STFA 10 |
AB |
347 |
336.9 |
45 |
Show |
|
04283+1618 |
OCC9091 |
|
-1 |
0.1 |
45 |
Show |
|
04280+1629 |
SKF2121 |
|
292 |
2.2 |
48 |
Show |
|
04284+1622 |
RCH 2 |
|
30 |
0.0 |
48 |
Show |
|
04290+1610 |
HU 1080 |
|
266 |
0.2 |
51 |
Show |
|
04267+1645 |
GUE 4 |
|
192 |
0.4 |
51 |
Show |
|
04288+1617 |
BPMA 8 |
AG |
33 |
246.3 |
51 |
Show |
|
04288+1617 |
RAO 547 |
Aa,Ab |
96 |
0.7 |
51 |
Show |
|
04288+1617 |
RAO 547 |
AH |
175 |
2.0 |
51 |
Show |
|
04234+1638 |
OCC 527 |
|
-1 |
0.1 |
52 |
Show |
|
04220+1547 |
OCC1011 |
|
-1 |
0.1 |
54 |
Show |
|
04283+1518 |
LDS3589 |
|
131 |
34.8 |
54 |
Show |
|
04261+1502 |
KPP3569 |
|
149 |
2.1 |
55 |
Show |
|
04264+1651 |
OCC 553 |
|
-1 |
0.0 |
56 |
Show |
|
04220+1530 |
DCH 50 |
AB |
305 |
6.0 |
59 |
Show |
|
04220+1530 |
DCH 50 |
AC |
290 |
28.3 |
59 |
Show |
|
04273+1503 |
LDS3587 |
|
112 |
30.9 |
59 |
Show |
|
04245+1653 |
PAT 6 |
|
235 |
1.3 |
60 |
Show |
|
04219+1530 |
CHX 1 |
|
315 |
7.8 |
60 |
Show |
|
04298+1550 |
LDS2245 |
|
68 |
4.5 |
60 |
Show |
|
04227+1503 |
STT 82 |
AB |
323 |
1.2 |
68 |
Show |
|
04227+1503 |
LDS1166 |
AC |
290 |
66.4 |
68 |
Show |
|
04227+1503 |
CIA 24 |
Aa,Ab |
-1 |
-1.0 |
68 |
Show |
|
04271+1453 |
SKF2120 |
|
56 |
7.3 |
68 |
Show |
|
04301+1538 |
STF 554 |
|
15 |
1.4 |
68 |
Show |
|
04247+1704 |
SKF2119 |
|
356 |
4.9 |
69 |
|
|
WDS 04256+1556 : COMPONENTS
|
A |
Ab |
Ab |
pa=157.8°
sep=0.09"
| |
B |
pa=339.7°
sep=128.85"
| pa=339.7°
sep=128.94"
|
04256+1556 A
Name |
70 Tau |
|
Coord arcsec 2000 |
042537.25+155627.9 |
|
Mag |
6.45 |
|
Spectral class |
F7V (yellow-white) |
|
PmRA |
105.00 |
|
PmDE |
-29.0 |
|
SAO |
93925 |
|
HIP |
20661 |
|
Tycho2 |
1265-01171-1 |
|
HD |
27991 |
|
HR |
1391 |
|
GC |
5356 |
|
BD |
BD+15 621 |
|
Flamsteed |
70 Tauri |
|
Flamsteed name |
70 Tau |
|
Tycho2 |
1265-01171-1 |
|
Pflag |
|
|
RAmdeg |
66.40548893 |
|
DEmdeg |
15.94102023 |
|
PmRA |
105.1 |
|
PmDE |
-24.7 |
|
E RAmdeg |
4 |
|
E DEmdeg |
4 |
|
E pmRA |
1.0 |
|
E pmDE |
1.0 |
|
EpRAm |
1991.45 |
|
EpDEm |
1991.06 |
|
Num |
15 |
|
Q RAmdeg |
1.2 |
|
Q DEmdeg |
1.8 |
|
Q pmRA |
1.4 |
|
Q pmDE |
1.7 |
|
BTmag |
7.023 |
|
E BTmag |
0.015 |
|
VTmag |
6.490 |
|
E VTmag |
0.010 |
|
Prox |
999 |
|
TYC |
T |
|
HIP |
20661 |
|
CCDM |
AP |
|
RAdeg |
66.40523778 |
|
DEdeg |
15.94108000 |
|
EpRA 1990 |
1.75 |
|
EpDE 1990 |
1.33 |
|
E RAdeg |
3.5 |
|
E DEdeg |
4.1 |
|
Posflg |
P |
|
Corr |
-0.4 |
|
SAO |
93925 |
|
DelFlag |
|
|
RA1950 |
|
|
PmRA1950 |
0.0074 |
|
DE1950 |
|
|
PmDE1950 |
-0.027 |
|
Vmag |
6.4 |
|
SpType |
F8 |
|
Double code |
|
|
Source |
70 |
|
CatNum |
5356 |
|
DM |
BD+15 621 |
|
DMcomp |
|
|
BDsup |
|
|
HD |
27991 |
|
M HD |
0 |
|
GC |
5356 |
|
RA1950rad |
1.14652452 |
|
DE1950rad |
0.27625532 |
|
PmRA2000 |
0.0074 |
|
PmDE2000 |
-0.028 |
|
Catalog |
H |
|
HIP |
20661 |
|
Proxy |
H |
|
RAhms |
04 25 37.25 |
|
DEdms |
+15 56 27.9 |
|
Vmag |
6.44 |
|
VarFlag |
|
|
R Vmag |
H |
|
RAdeg |
66.4052 |
|
DEdeg |
15.9411 |
|
AstroRef |
* |
|
Plx |
21.47 |
|
CCDM |
04256+1557 |
|
N CCDM |
I |
|
Nsys |
1 |
|
Ncomp |
2 |
|
MultFlag |
C |
|
Source |
S |
|
Qual |
A |
|
M HIP |
PA |
|
Theta |
156 |
|
Rho |
0.099 |
|
HD |
27991 |
|
BD |
BD+15 621 |
|
CD |
|
|
CP |
|
|
Dm number |
+15 621 |
|
VIred |
0.57 |
|
SpType |
F7V |
|
R SpType |
|
|
Coord arcsec 2000 |
042537.25+155627.9 |
|
HIP |
20661 |
|
Sn |
55 |
|
So |
3 |
|
Nc |
2 |
|
RArad |
1.1589897843 |
|
DErad |
0.2782243366 |
|
Plx |
21.2 |
|
PmRA |
104.06 |
|
PmDE |
-27.71 |
|
E RArad |
0.84 |
|
E DErad |
0.45 |
|
E Plx |
0.92 |
|
E pmRA |
1.17 |
|
E pmDE |
0.79 |
|
Hpmag |
6.5556 |
|
E Hpmag |
0.0008 |
|
SHp |
0.007 |
|
VA |
0 |
|
BV |
0.509 |
|
E BV |
0.005 |
|
VI |
0.58 |
|
04256+1556 Ab
Coord arcsec 2000 |
042537.25+155627.8 |
|
Mag |
7 |
|
Calc delta mag |
0.74 |
|
Calc coord |
yes |
|
04256+1556 B
Coord arcsec 2000 |
042534.16+155828.8 |
|
Mag |
13.39 |
|
PmRA |
1.00 |
|
PmDE |
-3.0 |
|
Calc delta mag |
5.65 |
|
Calc coord |
yes |
|