Coord 2000 | 17146+1423 |
Discov num | STF2140 |
Comp | AB |
Coord arcsec 2000 | 17 14 38.86 +14 23 24.9 |
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Date first | 1777 |
Date last | 2020 |
Obs | 513 |
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Pa first | 117 |
Pa last | 103 |
P.A. Now (θ) | 102.5° |
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Sep first | 9.0 |
Sep last | 4.7 |
Sep. Now (ρ) | 4.64" |
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Mag pri | 3.48 |
Mag sec | 5.40 |
delta mag (ΔM) | 1.92 |
Spectral class | M5Ib-II (red) |
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Pri motion ra | -017 |
Sec motion ra | -007 |
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Pri motion dec | +047 |
Sec motion dec | +033 |
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Notes |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 102680 | 17 14 39 +14 23 25 | CHR 139 Aa,Ab | 1991 | 3 | 231 | 0.2 | 3.48 | |||||
Show | Rasalgethi | 102680 | 17 14 39 +14 23 25 | STF 2140 AB | 2020 | 513 | 102 | 4.6 | 3.48 | 5.40 | 1.92 | Y | <=== |
Show | 102680 | 17 14 39 +14 23 25 | AGC 16 AC | 2020 | 10 | 296 | 16.6 | 3.48 | 15.50 | 12.02 | |||
Show | 102680 | 17 14 39 +14 23 25 | STF 2140 AD | 2002 | 14 | 39 | 79.2 | 3.48 | 11.10 | 7.62 |
Precise pa | 102.7 |
Precise sep | 4.68 |
Common name | Rasalgethi |
Constellation | Hercules |
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SAO | 102680 |
HIP | 84345 |
Tycho2 | 0990-02133-1 |
Gaia DR2 | 4541877995116193408 |
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HD | 156014 |
HR | 6406 |
GC | 23277 |
ADS | 10418 |
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BD | BD+14 3207 |
Bayer | Alpha 1 Herculis |
Bayer name | Alp1 Her |
Flamsteed | 64 Herculis |
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Flamsteed name | 64 Her |
Distance | 110.25 |
Distance ly | 359.64 |
last precise pa | 102.7 |
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last precise sep | 4.68 |
Period (P) | 3600y | Periastron (T) | 1835y | Semi-major axis (a) | 4.68a | |||
Eccentricity (e) | 0 | Inclination (i) | 155.8° | Longitude of periastron (ω) | 0° | |||
Node (Ω) | 119.6° | Note | Grade | 4 | (1=Definitive, 9=Indet.) | |||
Equinox | Last observation | 1970 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
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![]() Measures: green=micrometric, blue=interferometric, purple=photographic |
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coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
17146+1423 | STF2140 | AB | 2007 | 438 | 105 | 4.8 | 3.48 | 5.40 | M5Ib-II | NOD | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2009 | 448 | 105 | 4.9 | 3.48 | 5.40 | M5Ib-II | NOD | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2010 | 459 | 103 | 4.7 | 3.48 | 5.40 | M5Ib-II | NOD | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2012 | 462 | 104 | 4.6 | 3.48 | 5.40 | M5Ib-II | NOD | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2013 | 471 | 103 | 4.8 | 3.48 | 5.40 | M5Ib-II | NOD | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2014 | 476 | 103 | 4.8 | 3.48 | 5.40 | M5Ib-II | NOD | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2015 | 484 | 104 | 4.9 | 3.48 | 5.40 | M5Ib-II | NO | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2016 | 495 | 104 | 4.8 | 3.48 | 5.40 | M5Ib-II | NO | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2017 | 498 | 104 | 4.8 | 3.48 | 5.40 | M5Ib-II | NO | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2018 | 501 | 104 | 4.8 | 3.48 | 5.40 | M5Ib-II | NO | 171438.86+142324.9 |
17146+1423 | STF2140 | AB | 2019 | 505 | 103 | 5.0 | 3.48 | 5.40 | M5Ib-II | NO | 171438.86+142324.9 |