05558+3656 STT 122 (HD 39697)
05h 55m 50.25s +36° 56' 12.1" P.A. 94.00 sep 0.3 mag 7.80,8.49 Sp A5 dist. 152.44 pc (497.26 l.y.)
Coord 2000 |
05558+3656 |
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Discov num |
STT 122 |
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Comp |
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Coord arcsec 2000 |
05 55 50.25 +36 56 12.1 |
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Date first |
1843 |
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Date last |
2018 |
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Obs |
42 |
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Pa first |
118 |
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Pa last |
93.9 |
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P.A. Now (θ) |
92.7° |
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Sep first |
0.2 |
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Sep last |
0.32 |
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Sep. Now (ρ) |
0.392" |
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Mag pri |
7.80 |
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Mag sec |
8.49 |
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delta mag (ΔM) |
0.69 |
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Spectral class |
A5 (white) |
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Pri motion ra |
-010 |
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Sec motion ra |
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Pri motion dec |
-033 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 39697 |
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Constellation |
Auriga |
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SAO |
58575 |
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HIP |
28043 |
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Tycho2 |
2418-00554-1 |
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HD |
39697 |
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ADS |
4505 |
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BD |
BD+36 1297 |
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Distance |
152.44 |
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Distance ly |
497.26 |
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ORBITAL ELEMENTS
Period (P) | 217.74y | |
Periastron (T) | 1966.95y | |
Semi-major axis (a) | 0.376a | |
Eccentricity (e) | 0.844 | |
Inclination (i) | 64.9° | |
Longitude of periastron (ω) | 249.9° | |
Node (Ω) | 62.1° | |
Notes | | |
Reference | Lin1990a | |
Equinox | | |
Last observation | 1988 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
83.9 |
0.346 |
2001 |
84.4 |
0.349 |
2002 |
84.8 |
0.352 |
2003 |
85.2 |
0.355 |
2004 |
85.7 |
0.358 |
2005 |
86.1 |
0.361 |
2006 |
86.5 |
0.364 |
2007 |
86.9 |
0.366 |
2008 |
87.3 |
0.368 |
2009 |
87.7 |
0.371 |
2010 |
88.0 |
0.373 |
2011 |
88.4 |
0.375 |
2012 |
88.8 |
0.377 |
2013 |
89.2 |
0.379 |
2014 |
89.5 |
0.380 |
2015 |
89.9 |
0.382 |
2016 |
90.3 |
0.384 |
2017 |
90.6 |
0.385 |
2018 |
91.0 |
0.386 |
2019 |
91.3 |
0.388 |
2020 |
91.7 |
0.389 |
2021 |
92.0 |
0.390 |
2022 |
92.4 |
0.391 |
2023 |
92.7 |
0.392 |
2024 |
93.1 |
0.393 |
2025 |
93.4 |
0.394 |
2026 |
93.8 |
0.394 |
2027 |
94.1 |
0.395 |
2028 |
94.4 |
0.396 |
2029 |
94.8 |
0.396 |
2030 |
95.1 |
0.397 |
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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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