20104+3644 SEI 946AC

 
 
20h 10m 26.44s +36 44' 01.2" P.A. 64.00 sep 13.7 mag 9.50,11.00 Sp B8
 
 
Coord 2000
20104+3644
Discov num
SEI 946
Comp
AC
Coord arcsec 2000
20 10 26.44 +36 44 01.2
Date first
1896
Date last
2014
Obs
5
Pa first
72
Pa last
64
P.A. Now (θ)
64°
Sep first
16.3
Sep last
13.7
Sep. Now (ρ)
13.7"
Mag pri
9.50
Mag sec
11.00
delta mag (ΔM)
1.5
Spectral class
B8 (blue-white)
Pri motion ra
+009
Sec motion ra
Pri motion dec
+000
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
20104+3644 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 20 10 26 +36 44 01 SEI 945 AB 2015 12 276 5.9 9.50 11.00 1.50
Show 20 10 26 +36 44 01 SEI 946 AC 2014 5 64 13.7 9.50 11.00 1.50 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
63.9
Precise sep
13.697
Constellation
Hydra
Tycho2
2683-02793-1
Gaia DR2
2059246847770108160
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20104+3644 SEI 946 AC 1896 1 72 16.3 9.50 11.00 N 201026.44+364401.2
20104+3644 SEI 946 AC 1998 2 64 13.6 9.50 11.00 N 201026.44+364401.2
20104+3644 SEI 946 AC 2014 5 64 13.7 9.50 11.00 B8 N 201026.44+364401.2

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WDS 20104+3644 SEI 946AC : NOTES
 
 
discov_num notes refcode
SEI 946 AC. Very faint object seen on POSS plate near purported position of C
component; uncertain whether Scheiner's tertiary is a variable star or
a flaw on AC Potsdam plate.
C may be at 292 deg & 15.1" with a 120 deg error by Scheiner. Dam2011
 
 
REFERENCES
 
 
refcode metd author reference
Dam2011 j Damm, F. ...................
Dam2011 private communication, 2011
 
 
DISCOVERER
 
 
discov author
SEI Scheiner, J.

 
 
WDS 20104+3644 SEI 946AC : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20104+3644 SEI 946AC : MEASURES
 
 
No records found.

 
 
WDS 20104+3644 SEI 946AC : Virtual Eyepiece
 
 

20104+3644 SEI 945A mag 9.5 Sp B8 20104+3644 SEI 945B sep 4.7 P.A. 277.00 mag 11 20104+3644 SEI 946C sep 11.6 P.A. 58.60 mag 11 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.

Radius:
 
 
WDS 20104+3644 SEI 946AC : Aladin DSS image @ 20h 10m 26.44s +36 44' 01.2"