18017+4011 STF2267

 
 
18H 01M 41.17S +40 10' 41.9" P.A. 276.5 SEP 0.51 MAG 8.41,8.84 SP A3 DIST. 249.38 PC (813.48 L.Y.)
 
 
Coord 2000
18017+4011
Discov num
STF2267
Comp
Coord arcsec 2000
18 01 41.17 +40 10 41.9
Date first
1830
Date last
2016
Obs
133
Pa first
234
Pa last
276
P.A. Now (θ)
276.5°
Sep first
1.4
Sep last
0.5
Sep. Now (ρ)
0.51"
Mag pri
8.41
Mag sec
8.84
delta mag (ΔM)
0.43
Spectral class
A3 (white)
Pri motion ra
-003
Sec motion ra
-003
Pri motion dec
+014
Sec motion dec
+014
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
47149
HIP
88284
Tycho2
3106-00396-1
HD
164941
ADS
11001
BD
BD+40 3263
Distance
249.38
Distance ly
813.48
last precise pa
276.3
last precise sep
0.54
 
 
ORBITAL ELEMENTS
 
 
Period (P)1660y Periastron (T)2121y Semi-major axis (a)1.368a
Eccentricity (e)0.69 Inclination (i)55.5° Longitude of periastron (ω)351.9°
Node (Ω)37.3° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2011
label rho theta
2000 0.607 266.9
2001 0.602 267.3
2002 0.597 267.8
2003 0.591 268.3
2004 0.586 268.7
2005 0.581 269.2
2006 0.575 269.7
2007 0.570 270.2
2008 0.565 270.8
2009 0.559 271.3
2010 0.554 271.8
2011 0.549 272.4
2012 0.544 272.9
2013 0.538 273.5
2014 0.533 274.1
2015 0.528 274.7
2016 0.523 275.3
2017 0.518 275.9
2018 0.513 276.5
2019 0.507 277.1
2020 0.502 277.8
2021 0.497 278.5
2022 0.492 279.1
2023 0.487 279.8
2024 0.483 280.5
2025 0.478 281.3
2026 0.473 282.0
2027 0.468 282.8
2028 0.463 283.5
2029 0.459 284.3
2030 0.454 285.1

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic