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Current system
10361-2641
BU 411
NSV4907


Nearby doubles
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UC 1965

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TOK 135

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B 202

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DAM2469

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UC 1946

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B 203

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DAM2394

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UC 1966

91' : 10316-2534
UC 1947

100' : 10375-2818
RST1517

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TDS7433

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RST5348

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RSS 241AB

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DON 430

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FIN 308AB

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RST 494



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Binary Systems
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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

10361-2641 BU 411 (NSV4907)

 
 
10h 36m 04.49s -26° 40' 31.6" P.A. 302.00 sep 1.3 mag 6.68,7.77 Sp F6V dist. 41.25 pc (134.56 l.y.)
 
 
Coord 2000 10361-2641 Discov num BU  411 Comp Coord arcsec 2000 10 36 04.49 -26 40 31.6
Date first 1876 Date last 2023 Obs 120
Pa first 310 Pa last 301.7 P.A. Now (θ) 301.1°
Sep first 1.3 Sep last 1.314 Sep. Now (ρ) 1.313"
Mag pri 6.68 Mag sec 7.77 delta mag (ΔM) 1.09 Spectral class F6V (yellow-white)
Pri motion ra -008 Sec motion ra -008
Pri motion dec -086 Sec motion dec -086
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name NSV4907 Constellation Hydra SAO 179014 HIP 51885
Tycho2 6628-01612-1 Gaia DR2 5468409368370405888 HD 91881 HR 4157
GC 14571 ADS 7846 CD CD-26 8022 CP CP-26 4360
Distance 41.25 Distance ly 134.56
 
 
ORBITAL ELEMENTS
 
 
Period (P)159.2877y± 2.2479 Periastron (T)1948.3135y± 0.1278 Semi-major axis (a)0.86653a± 0.0074
Eccentricity (e)0.75879± 0.00591 Inclination (i)128.49°± 0.789 Longitude of periastron (ω)41.725°± 1.472
Node (Ω)148.934°± 1.004 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 310.9 1.297
2001 310.5 1.302
2002 310.1 1.307
2003 309.7 1.311
2004 309.3 1.315
2005 308.9 1.318
2006 308.5 1.321
2007 308.1 1.324
2008 307.7 1.327
2009 307.3 1.329
2010 306.9 1.330
2011 306.6 1.331
2012 306.2 1.332
2013 305.8 1.333
2014 305.4 1.333
2015 305.0 1.333
2016 304.6 1.332
2017 304.2 1.331
2018 303.8 1.330
2019 303.5 1.329
2020 303.1 1.327
2021 302.7 1.325
2022 302.3 1.322
2023 301.9 1.319
2024 301.5 1.316
2025 301.1 1.313
2026 300.7 1.309
2027 300.3 1.305
2028 299.9 1.301
2029 299.5 1.296
2030 299.1 1.291
2031 298.7 1.286
2032 298.2 1.280
2033 297.8 1.274
2034 297.4 1.268
2035 297.0 1.262
2036 296.5 1.255
2037 296.1 1.248
2038 295.6 1.240
2039 295.2 1.233
2040 294.7 1.225
2041 294.3 1.217
2042 293.8 1.208
2043 293.3 1.199
2044 292.8 1.190
2045 292.4 1.181
2046 291.9 1.171
2047 291.4 1.161
2048 290.8 1.151
2049 290.3 1.140
2050 289.8 1.130


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds10361-2641c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic