Delta Scorpii
Variable
Star
Comparison
Star
9
alpha2 Librae
HR 5531
HD 140841Type A3IV
(2000)
RA 14hr 50' 52.6"
Dec -16deg 02' 31"V= 2.750
B= 2.900
U= 3.000
(B - V)= +0.150
(U - B)= +0.100
Note: Due wide color difference and distance this is not a good camparison star
Program
Star
7 delta Scorpii
HR 5953
HD 143275Type B8V
(2000)
RA 16hr 00' 19.9"
Dec -22deg 37' 18"Listed Magnitudes
V= 2.317
B=2.190
U= 1.281
(B - V)= -0.124
(U - B)= -0.909
Standard star Data from UBV Photometric System, Mermilliod J.C. & Mermilliod M, 1998, New Version
Comparison
Star
23
tau Scorpii
HR 6165
HD 149438Type BOV
(2000)
RA 16hr 35' 52.9"
Dec -28deg 12' 58"V= 2.825
B= 2.575
U= 1.548
(B - V)= -0.250
(U - B)= -1.027
HOPKINS PHOENIX OBSERVATORY
Delta Scorpii
UBV Data
May 2005
Sebastian Otero
of Buenos Aires, Argentina
has been following this star for several years.
See Sebastian's web
site
*
For reference only, not reommended for accuate data
|
JD |
V
|
#
|
SD
|
B
|
#
|
SD
|
U
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#
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SD
|
(B-V)
|
(U-B)
|
Comp
Star |
|
3,501.8301
|
2.028
|
3
|
0.006
|
2.185
|
3
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0.008
|
1.312
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3
|
0.018
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0.157
|
-0.873
|
alpha
Lib *
|
|
3,502.8083
|
2.054
|
3
|
0.010
|
2.215
|
3
|
0.009
|
1.361
|
3
|
0.024
|
0.161
|
-0.854
|
alpha
Lib*
|
|
3,505.8264
|
2.016
|
3
|
0.010
|
2.179
|
3
|
0.011
|
1.310
|
3
|
0.013
|
0.162
|
-0.869
|
alpha
Lib*
|
|
3,505.8549
|
2.127
|
3
|
0.001
|
1.805
|
3
|
0.003
|
0.791
|
3
|
0.016
|
-0.322
|
-1.014
|
tau
Sco *
|
|
3,506.8243
|
2.108
|
3
|
0.009
|
1.791
|
3
|
0.007
|
0.749
|
3
|
0.018
|
-0.317
|
-1.042
|
tau
Sco*
|
|
3,509.8063
|
2.024
|
3
|
0.008
|
1.997
|
3
|
0.008
|
0.972
|
3
|
0.013
|
-0.057
|
-1.026
|
omega
Sco
|
|
3,511.8000
|
2.061
|
3
|
0.006
|
2.005
|
3
|
0.011
|
1.008
|
3
|
0.015
|
-0.056
|
-0.998
|
omega
Sco
|
|
3,512.8194
|
2.053
|
3
|
0.018
|
1.996
|
3
|
0.022
|
1.002
|
3
|
0.034
|
-0.057
|
-0.995
|
omega
Sco
|
|
3,513.8257
|
2.074
|
1
|
N/A
|
2.023
|
1
|
N/A
|
1.001
|
1
|
N/A
|
-0.051
|
-1.022
|
omega
Sco
|
|
3,516.7979
|
2.026
|
3
|
0.008
|
1.961
|
3
|
0.010
|
0.959
|
3
|
0.013
|
-0.064
|
0.959
|
omega
Sco
|
|
3,522.7632
|
2.028
|
1
|
N/A
|
2.187
|
1
|
N/A
|
1.339
|
1
|
N/A
|
0.159
|
-0.848
|
alpha
Lib*
|
|
3,522.7764
|
2.040
|
3
|
0.006
|
1.977
|
3
|
0.011
|
0.956
|
3
|
0.017
|
-0.063
|
1.020
|
omega
Sco
|
|
3,522.8056
|
2.107
|
1
|
N/A
|
1.785
|
1
|
N/A
|
0.763
|
1
|
N/A
|
-0.322
|
-1.022
|
tau
Sco*
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Comparison
Star
9
omega1 Scorpii
HR 5993
HD 144470Type BIV
(2000)
RA 16hr 06' 48.3"
Dec -20deg 40' 09"V= 3.954
B= 3.915
U= 3.093
(B - V)= -0.039
(U - B)= -0.822Note: This star is a closer color match and color to delta Sco thus a better comparison star
Hopkins Phoenix Observatory Light Curves
TBD
Modified 6 June 2005
