18253+4846 STT 351 AC (HD 170109)
18h 25m 18.20s +48° 45' 42.5" P.A. 26.00 sep 1.0 mag 7.90,8.25 Sp G5 dist. 144.72 pc (472.08 l.y.)
| Coord 2000 |
18253+4846 |
|
Discov num |
STT 351 |
|
Comp |
AC |
|
Coord arcsec 2000 |
18 25 18.20 +48 45 42.5 |
|
| Date first |
1843 |
|
Date last |
2021 |
|
Obs |
102 |
|
| Pa first |
45 |
|
Pa last |
25.7 |
|
P.A. Now (θ) |
25.7° |
|
| Sep first |
0.3 |
|
Sep last |
0.958 |
|
Sep. Now (ρ) |
0.958" |
|
| Mag pri |
7.90 |
|
Mag sec |
8.25 |
|
delta mag (ΔM) |
0.35 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+019 |
|
Sec motion ra |
+019 |
|
| Pri motion dec |
+004 |
|
Sec motion dec |
+004 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
18253+4846 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
47482 |
18 25 18 +48 45 42 |
HU 66 AB |
2016 |
65 |
197 |
0.2 |
7.90 |
8.40 |
0.50 |
Y |
|
| Show |
HD 170109 |
47482 |
18 25 18 +48 45 42 |
STT 351 AC |
2021 |
102 |
26 |
1.0 |
7.90 |
8.25 |
0.35 |
Y |
<=== |
| Show |
|
|
18 25 18 +48 45 42 |
HU 66 BC |
2019 |
20 |
26 |
0.8 |
8.40 |
8.25 |
0.15 |
Y |
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 170109 |
|
Constellation |
Draco |
|
SAO |
47482 |
|
HIP |
90284 |
|
| Tycho2 |
3534-00302-1 |
|
Gaia DR2 |
2123486226905640960 |
|
HD |
170109 |
|
BD |
BD+48 2692 |
|
| Distance |
144.72 |
|
Distance ly |
472.08 |
|
ORBITAL ELEMENTS
| Period (P) | 3025.4903y | ± 1692.4837 |
Periastron (T) | 2320.8534y | ± 536.1239 |
Semi-major axis (a) | 3.80032a | ± 2.01917 |
| Eccentricity (e) | 0.80754 | ± 0.13757 |
Inclination (i) | 82.801° | ± 6.417 |
Longitude of periastron (ω) | 60.383° | ± 47.747 |
| Node (Ω) | 57.244° | ± 32.434 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
22.1 |
0.748 |
| 2001 |
22.3 |
0.750 |
| 2002 |
22.5 |
0.753 |
| 2003 |
22.8 |
0.756 |
| 2004 |
23.0 |
0.758 |
| 2005 |
23.2 |
0.761 |
| 2006 |
23.4 |
0.763 |
| 2007 |
23.6 |
0.766 |
| 2008 |
23.9 |
0.768 |
| 2009 |
24.1 |
0.771 |
| 2010 |
24.3 |
0.774 |
| 2011 |
24.5 |
0.776 |
| 2012 |
24.7 |
0.779 |
| 2013 |
24.9 |
0.781 |
| 2014 |
25.1 |
0.784 |
| 2015 |
25.3 |
0.787 |
| 2016 |
25.5 |
0.789 |
| 2017 |
25.7 |
0.792 |
| 2018 |
25.9 |
0.795 |
| 2019 |
26.1 |
0.797 |
| 2020 |
26.3 |
0.800 |
| 2021 |
26.5 |
0.803 |
| 2022 |
26.7 |
0.805 |
| 2023 |
26.9 |
0.808 |
| 2024 |
27.1 |
0.811 |
| 2025 |
27.3 |
0.813 |
| 2026 |
27.5 |
0.816 |
| 2027 |
27.7 |
0.819 |
| 2028 |
27.9 |
0.821 |
| 2029 |
28.1 |
0.824 |
| 2030 |
28.3 |
0.827 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
WDS 18253+4846 STT 351 AC (HD 170109) : NOTES
| discov_num |
notes |
refcode |
| HU 66 |
Van Biesbroeck (1954) was unable to resolve this system in 1943, |
|
|
1944 or 1945 on the 82-inch telescope at the McDonald Observatory. |
|
|
However, since he resolved the system successfully in 1946 with the |
|
|
same telescope, and in 1940 with a smaller (40-inch) telescope, the |
|
|
non-resolution is probably due to bad seeing or ID error. |
USN2002 |
| STT 351 |
AC: Additional notes may be found in Muller (1955). |
Mlr1955c |
REFERENCES
| refcode |
metd |
author |
reference |
| Izm2019 |
orb u |
Izmailov, I.S. |
2019AstL...45...30I |
| Izm2019 |
|
Ast. Lett. 45, 30, 2019 |
|
| Izm2019 |
|
(Orbital elements from weighted solutions used when available (Table 2), |
|
| Izm2019 |
|
unweighted elements (Table 1) used for remaining 29 systems.) |
|
| Mlr1955c |
Mc - |
Muller, P. |
1955JO.....38..221M |
| Mlr1955c |
|
J. Obs. 38, 221, 1955 |
|
| USN2002 |
orb - |
Seymour, D., Mason, B.D., Hartkopf, W.I., & Wycoff, G.L. |
2002AJ....123.1023S |
| USN2002 |
|
AJ 123, 1023, 2002 |
|
DISCOVERER
| idgroup |
discov |
author |
| 1 |
HU |
Hussey, W.F. |
| 58 |
STT |
Struve, O. |
WDS HISTORIC DATA
| coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
| 18253+4846 |
STT 351 |
AC |
2005 |
87 |
29 |
0.6 |
7.90 |
8.25 |
|
D |
182518.20+484542.5 |
| 18253+4846 |
STT 351 |
AC |
2007 |
88 |
23 |
0.7 |
7.90 |
8.25 |
|
D |
182518.20+484542.5 |
| 18253+4846 |
STT 351 |
AC |
2010 |
90 |
26 |
0.8 |
7.90 |
8.25 |
|
N D |
182518.20+484542.5 |
| 18253+4846 |
STT 351 |
AC |
2011 |
92 |
25 |
0.8 |
7.90 |
8.25 |
G5 |
N |
182518.20+484542.5 |
| 18253+4846 |
STT 351 |
AC |
2013 |
90 |
25 |
0.8 |
7.90 |
8.25 |
G5 |
N |
182518.20+484542.5 |
| 18253+4846 |
STT 351 |
AC |
2015 |
91 |
26 |
0.8 |
7.90 |
8.25 |
G5 |
N |
182518.20+484542.5 |
| 18253+4846 |
STT 351 |
AC |
2017 |
92 |
29 |
0.8 |
7.90 |
8.25 |
G5 |
N |
182518.20+484542.5 |
| 18253+4846 |
STT 351 |
AC |
2019 |
96 |
26 |
0.8 |
7.90 |
8.25 |
G5 |
NO |
182518.20+484542.5 |
| 18253+4846 |
STT 351 |
AC |
2021 |
102 |
26 |
1.0 |
7.90 |
8.25 |
G5 |
NO |
182518.20+484542.5 |
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WDS 18253+4846 STT 351 AC (HD 170109) : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 18253+4846 STT 351 AC (HD 170109) : MEASURES
No records found.
WDS 18253+4846 (HD 170109) : VIRTUAL EYEPIECE
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WDS 18253+4846 (HD 170109) : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.
