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Latest Details
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Name
  alf Her  
AAVSO UID
000-BCW-090 (24863 observations)  
Constellation
Hercules Sequence
J2000.0
17 14 38.86 +14 23 25.2  (258.66192 +14.39033) Search nearby
B1950.0 17 12 21.99 +14 26 45.3
Proper motion
RA: -7.32 +/- 0.92 mas/yDec: 36.07 +/- 0.97 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 35.534 +27.818
Other names

(Internal only)
64 Her 1RXS J171439.3+142320 AAVSO 1710+14
ADS 10418 A BD+14 3207 DO 15854
HD 156014 HIP 84345 HR 6406
HR 6407 IRC +10324 RAFGL 1947
SAO 102680 alp1 Her  
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Variability type
SRB
Spectral type M3-M5Ib/III
Mag. range
2.73 - 3.60 V
Discoverer William Herschel (1795)
Epoch
26 May 1998 (HJD 2450960.0) Ephemeris
Outburst --
Period 125.6 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Other period is 93.48 d.
2 GCVS Team ADS 10418 A (B 5.39m, 4.9", 107deg, 1973; B - SB2, G5III + F2V). Slow variations, P ~6yr, Delta(m) ~0.5m; quicker changes, P ~ 50d - 155d, Delta(m) ~ 0.3m - 1.0m. Together with the visual companion the star is surrounded by an enormous envelope (R ~2*10**5R$, expansion velocity 10 km/s, mass loss 3*10**(-8)M$/yr).
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References
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1 Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves
and Periods		 2001PASP..113..983P
2 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
External Links
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Location    Go   
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = -2.30H = -3.22K = -3.51J - K = 1.21
AllWISE W4 = -3.72
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 17 14 38.86 +14 23 25.2 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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2 Historical light curve Otero, Sebastian Alberto 2011-08-16 01:30 UTC Light curve with data from the literature.
1 Phase plot Otero, Sebastian Alberto 2011-08-16 01:28 UTC Phase plot with data from the literature.
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Campaigns/Programs
 Legacy LPV Program
 LPV Program
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
5 Fernig, Leo 2022-04-22 13:33 UTC Discoverer updated from 1907AnHar..55....1C page 21
4 Otero, Sebastian Alberto 2011-08-16 01:30 UTC Light curve added.
3 Otero, Sebastian Alberto 2011-08-16 01:28 UTC Period and range from published data. Spectral type from Skiff (2010).
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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