09278-0604 B 2530 (HD 81809)
09h 27m 46.78s -06° 04' 16.4" P.A. 143.00 sep 0.3 mag 5.63,7.52 Sp G2V dist. 30.41 pc (99.2 l.y.)
Coord 2000 |
09278-0604 |
|
Discov num |
B 2530 |
|
Comp |
|
|
Coord arcsec 2000 |
09 27 46.78 -06 04 16.4 |
|
Date first |
1938 |
|
Date last |
2021 |
|
Obs |
77 |
|
Pa first |
319 |
|
Pa last |
143.2 |
|
P.A. Now (θ) |
145.9° |
|
Sep first |
0.2 |
|
Sep last |
0.259 |
|
Sep. Now (ρ) |
0.357" |
|
Mag pri |
5.63 |
|
Mag sec |
7.52 |
|
delta mag (ΔM) |
1.89 |
|
Spectral class |
G2V (yellow) |
|
Pri motion ra |
-227 |
|
Sec motion ra |
-227 |
|
Pri motion dec |
-077 |
|
Sec motion dec |
-077 |
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 81809 |
|
Constellation |
Hydra |
|
SAO |
136872 |
|
HIP |
46404 |
|
Tycho2 |
4893-01379-1 |
|
Gaia DR2 |
5745464991235898752 |
|
HD |
81809 |
|
HR |
3750 |
|
GC |
13048 |
|
GL |
Gl 344A |
|
BD |
BD-05 2802 |
|
Distance |
30.41 |
|
Distance ly |
99.2 |
|
ORBITAL ELEMENTS
Period (P) | 34.8y | ± 0.06 |
Periastron (T) | 2010.11y | ± 0.1 |
Semi-major axis (a) | 0.428a | ± 0.001 |
Eccentricity (e) | 0.27 | ± 0.003 |
Inclination (i) | 85.4° | ± 0.1 |
Longitude of periastron (ω) | 341.9° | ± 1.1 |
Node (Ω) | 330.8° | ± 0.1 |
Notes | n | |
Reference | Tok2015c | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
153.5 |
0.415 |
2001 |
154.5 |
0.363 |
2002 |
155.8 |
0.302 |
2003 |
157.9 |
0.233 |
2004 |
161.9 |
0.156 |
2005 |
174.3 |
0.076 |
2006 |
271.2 |
0.034 |
2007 |
316.4 |
0.106 |
2008 |
323.9 |
0.183 |
2009 |
327.1 |
0.248 |
2010 |
329.1 |
0.293 |
2011 |
330.7 |
0.315 |
2012 |
332.1 |
0.312 |
2013 |
333.8 |
0.285 |
2014 |
335.9 |
0.240 |
2015 |
339.2 |
0.183 |
2016 |
346.0 |
0.117 |
2017 |
10.0 |
0.053 |
2018 |
103.1 |
0.048 |
2019 |
131.8 |
0.111 |
2020 |
139.2 |
0.178 |
2021 |
142.6 |
0.243 |
2022 |
144.6 |
0.303 |
2023 |
145.9 |
0.357 |
2024 |
146.9 |
0.405 |
2025 |
147.7 |
0.447 |
2026 |
148.4 |
0.480 |
2027 |
149.0 |
0.507 |
2028 |
149.6 |
0.525 |
2029 |
150.1 |
0.535 |
2030 |
150.6 |
0.536 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
WDS 09278-0604 B 2530 (HD 81809) : NOTES
discov_num |
notes |
refcode |
B 2530 |
There may have been a quadrant reversal about 1951. The 3-year |
|
|
spectroscopic motion does not seem to relate to the visual pair. |
|
|
Giant primary according to isochrone fit. |
Sod1999 |
|
Single line SB, P = 2.5 y, also a known visual binary. Primary is G2V, |
|
|
so companion should likely be a cooler dwarf; this seems to be |
|
|
confirmed from magnitude differences observed at 750, 550, and 450nm. |
Bag1984b |
|
Pourbaix gives combined solution for this resolved SB2, yielding |
|
|
orbital parallaxes and component masses. |
Pbx2000b |
|
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic |
|
|
masses of 2.06 +/- 0.31, 2.44, and 1.00 Msun, respectively. |
Mlk2012 |
REFERENCES
refcode |
metd |
author |
reference |
Bag1984b |
S j |
Balega, Y.Y., Bonneau, D., & Foy, R |
1984A&AS...57...31B |
Bag1984b |
|
A&AS 57, 31, 1984 |
|
Mlk2012 |
not - |
Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. |
2012A&A...546A..69M |
Mlk2012 |
|
A&A 546, A69, 2012 |
|
Pbx2000b |
orb - |
Pourbaix, D. |
2000A&AS..145..215P |
Pbx2000b |
|
A&AS 145, 215, 2000 |
|
Sod1999 |
orb - |
Soderhjelm, S. |
1999A&A...341..121S |
Sod1999 |
|
A&A 341, 121, 1999 |
|
Tok2015c |
orb+j |
Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P. |
2015AJ....150...50T |
Tok2015c |
+St |
AJ 150, 50, 2015 (some measures corrected in Tok2017b) |
2017AJ....154..110T |
DISCOVERER
idgroup |
discov |
author |
1 |
B |
van den Bos, W.H. |
WDS HISTORIC DATA
coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
09278-0604 |
B 2530 |
|
1999 |
64 |
153 |
0.4 |
5.63 |
7.52 |
G2V |
NOD |
092746.78-060416.4 |
09278-0604 |
B 2530 |
|
2009 |
65 |
327 |
0.3 |
5.63 |
7.52 |
G2V |
NOD |
092746.78-060416.4 |
09278-0604 |
B 2530 |
|
2011 |
67 |
330 |
0.3 |
5.63 |
7.52 |
G2V |
NOD |
092746.78-060416.4 |
09278-0604 |
B 2530 |
|
2013 |
68 |
334 |
0.3 |
5.63 |
7.52 |
G2V |
NOD |
092746.78-060416.4 |
09278-0604 |
B 2530 |
|
2014 |
70 |
336 |
0.2 |
5.63 |
7.52 |
G2V |
NO |
092746.78-060416.4 |
09278-0604 |
B 2530 |
|
2017 |
73 |
35 |
0.0 |
5.63 |
7.52 |
G2V |
NO |
092746.78-060416.4 |
09278-0604 |
B 2530 |
|
2018 |
75 |
117 |
0.1 |
5.63 |
7.52 |
G2V |
NO |
092746.78-060416.4 |
09278-0604 |
B 2530 |
|
2019 |
76 |
135 |
0.1 |
5.63 |
7.52 |
G2V |
NO |
092746.78-060416.4 |
09278-0604 |
B 2530 |
|
2021 |
77 |
143 |
0.3 |
5.63 |
7.52 |
G2V |
NO |
092746.78-060416.4 |
If you need more information about this double, apply for a
data request form to the WDS.
WDS 09278-0604 B 2530 (HD 81809) : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 09278-0604 B 2530 (HD 81809) : MEASURES
No records found.
WDS 09278-0604 (HD 81809) : VIRTUAL EYEPIECE
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
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|
WDS 09278-0604 (HD 81809) : ALADIN DSS IMAGE @ 09h 27m 46.78s -06° 04' 16.4"
WDS 09278-0604 B 2530 (HD 81809) : NEIGHBORHOODS
|
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
|
Show |
name |
coord_2000 |
discov# |
comp |
pa |
sep |
dist(') |
Show |
|
09278-0604 |
B 2530 |
|
143 |
0.3 |
|
Show |
|
09255-0557 |
KPP 586 |
|
13 |
5.5 |
35 |
Show |
|
09302-0600 |
HDS1365 |
|
348 |
0.5 |
36 |
Show |
|
09261-0641 |
SKF 787 |
|
151 |
11.7 |
45 |
Show |
|
09240-0532 |
HJ 2496 |
|
48 |
19.5 |
65 |
Show |
|
09322-0550 |
DAM1641 |
|
173 |
16.3 |
68 |
Show |
|
09323-0546 |
RST4437 |
|
110 |
0.7 |
70 |
Show |
|
09325-0542 |
DAM1642 |
|
89 |
2.8 |
74 |
Show |
|
09288-0722 |
GIC 87 |
|
84 |
35.6 |
80 |
Show |
|
09334-0557 |
RST4913 |
|
20 |
3.6 |
85 |
Show |
|
09228-0516 |
UC 1782 |
|
310 |
34.0 |
89 |
Show |
|
09234-0503 |
GIC 85 |
|
108 |
13.6 |
90 |
Show |
|
09290-0733 |
RST3639 |
|
101 |
3.1 |
91 |
Show |
|
09308-0723 |
LDS3901 |
|
253 |
32.0 |
91 |
Show |
|
09321-0455 |
BRT 429 |
|
167 |
4.6 |
94 |
Show |
|
09244-0725 |
HEI 352 |
|
219 |
2.6 |
95 |
Show |
|
09289-0428 |
LDS3897 |
|
285 |
70.3 |
98 |
Show |
|
09331-0707 |
RST3643 |
|
130 |
1.2 |
101 |
Show |
|
09300-0741 |
UC 1804 |
|
358 |
22.7 |
102 |
Show |
|
09336-0704 |
DAM1651 |
|
328 |
13.5 |
105 |
Show |
|
09225-0454 |
GWP1165 |
|
238 |
8.2 |
106 |
Show |
|
09333-0711 |
CBL 131 |
|
19 |
57.7 |
107 |
Show |
|
09342-0703 |
RST3646 |
|
327 |
0.6 |
113 |
Show |
|
09230-0735 |
UC 1784 |
|
267 |
23.7 |
116 |
Show |
|
09293-0409 |
GIC 88 |
|
169 |
18.2 |
117 |
Show |
|
09283-0805 |
BU 213 |
|
171 |
1.9 |
122 |
Show |
|
09295-0402 |
UC 1801 |
|
196 |
9.8 |
125 |
Show |
|
09233-0752 |
UC 1785 |
|
39 |
52.8 |
128 |
Show |
|
09229-0753 |
BRT 428 |
|
191 |
4.3 |
132 |
Show |
|
09365-0622 |
GWP1203 |
|
110 |
13.9 |
132 |
Show |
|
09365-0630 |
DAM1663 |
|
76 |
5.9 |
133 |
Show |
|
09367-0633 |
TDS6685 |
|
105 |
0.5 |
137 |
Show |
|
09369-0632 |
TDS6687 |
|
94 |
1.9 |
140 |
Show |
|
09224-0759 |
TDS6512 |
|
58 |
0.5 |
141 |
Show |
|
09369-0642 |
GWP1204 |
|
239 |
76.0 |
141 |
Show |
|
09307-0821 |
RST3641 |
|
257 |
0.4 |
144 |
Show |
|
09287-0827 |
SKF 429 |
|
259 |
17.5 |
144 |
Show |
|
09207-0742 |
A 1082 |
AB |
200 |
0.6 |
145 |
Show |
|
09207-0742 |
BGH 4 |
CA |
326 |
135.0 |
145 |
Show |
|
09207-0742 |
TOK 527 |
CD |
342 |
999.9 |
145 |
Show |
|
09214-0415 |
HJ 132 |
|
237 |
27.1 |
146 |
Show |
|
09362-0725 |
HJ 818 |
AB |
48 |
11.5 |
150 |
Show |
|
09362-0725 |
GWP1201 |
AC |
207 |
90.9 |
150 |
Show |
Alphard |
09276-0840 |
H 6 111 |
AB |
155 |
284.4 |
156 |
Show |
Alphard |
09276-0840 |
H 6 111 |
AC |
85 |
257.0 |
156 |
Show |
|
09311-0330 |
KPP2758 |
|
76 |
43.8 |
162 |
Show |
|
09169-0538 |
HJ 127 |
|
285 |
12.6 |
163 |
Show |
|
09225-0828 |
A 1083 |
|
58 |
4.4 |
164 |
Show |
|
09170-0531 |
GWP1155 |
|
202 |
17.8 |
165 |
Show |
|
09167-0621 |
KUI 40 |
|
287 |
1.3 |
167 |
Show |
|
09185-0733 |
J 2651 |
|
209 |
3.9 |
167 |
|
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WDS 09278-0604 : COMPONENTS
09278-0604 A
Componente originario normalizzato |
AB |
|
Name |
HD 81809 |
|
Coord arcsec 2000 |
092746.78-060416.4 |
|
Mag |
5.63 |
|
Spectral class |
G2V (yellow) |
|
PmRA |
-227.00 |
|
PmDE |
-77.0 |
|
SAO |
136872 |
|
HIP |
46404 |
|
Tycho2 |
4893-01379-1 |
|
HD |
81809 |
|
HR |
3750 |
|
GC |
13048 |
|
BD |
BD-05 2802 |
|
Tycho2 |
4893-01379-1 |
|
Pflag |
|
|
RAmdeg |
141.94494627 |
|
DEmdeg |
-6.07123431 |
|
PmRA |
-227.3 |
|
PmDE |
-76.6 |
|
E RAmdeg |
3 |
|
E DEmdeg |
4 |
|
E pmRA |
1.1 |
|
E pmDE |
1.0 |
|
EpRAm |
1991.55 |
|
EpDEm |
1990.98 |
|
Num |
12 |
|
Q RAmdeg |
1.3 |
|
Q DEmdeg |
1.5 |
|
Q pmRA |
1.5 |
|
Q pmDE |
1.4 |
|
BTmag |
6.196 |
|
E BTmag |
0.014 |
|
VTmag |
5.483 |
|
E VTmag |
0.009 |
|
Prox |
999 |
|
TYC |
T |
|
HIP |
46404 |
|
CCDM |
AB |
|
RAdeg |
141.94547472 |
|
DEdeg |
-6.07105000 |
|
EpRA 1990 |
1.68 |
|
EpDE 1990 |
1.35 |
|
E RAdeg |
3.4 |
|
E DEdeg |
3.8 |
|
Posflg |
P |
|
Corr |
0.3 |
|
SAO |
136872 |
|
DelFlag |
|
|
RA1950 |
|
|
PmRA1950 |
-0.0153 |
|
DE1950 |
|
|
PmDE1950 |
-0.079 |
|
Vmag |
5.4 |
|
SpType |
G0 |
|
Double code |
|
|
Source |
70 |
|
CatNum |
13048 |
|
DM |
BD-05 2802 |
|
DMcomp |
|
|
BDsup |
|
|
HD |
81809 |
|
M HD |
0 |
|
GC |
13048 |
|
RA1950rad |
2.46659681 |
|
DE1950rad |
-0.10213333 |
|
PmRA2000 |
-0.015 |
|
PmDE2000 |
-0.074 |
|
Catalog |
H |
|
HIP |
46404 |
|
Proxy |
H |
|
RAhms |
09 27 46.92 |
|
DEdms |
-06 04 15.7 |
|
Vmag |
5.38 |
|
VarFlag |
|
|
R Vmag |
G |
|
RAdeg |
141.945 |
|
DEdeg |
-6.07103 |
|
AstroRef |
A |
|
Plx |
32.01 |
|
CCDM |
09278-0604 |
|
N CCDM |
I |
|
Nsys |
1 |
|
Ncomp |
2 |
|
MultFlag |
C |
|
Source |
|
|
Qual |
A |
|
M HIP |
AB |
|
Theta |
148 |
|
Rho |
0.487 |
|
HD |
81809 |
|
BD |
BD-05 2802 |
|
CD |
|
|
CP |
|
|
Dm number |
-05 2802 |
|
VIred |
0.73 |
|
SpType |
G2V |
|
R SpType |
|
|
Coord arcsec 2000 |
092746.92-060415.7 |
|
HIP |
46404 |
|
Sn |
15 |
|
So |
3 |
|
Nc |
2 |
|
RArad |
2.4774161172 |
|
DErad |
-0.1059594394 |
|
Plx |
32.88 |
|
PmRA |
-233.71 |
|
PmDE |
-66.17 |
|
E RArad |
0.73 |
|
E DErad |
0.47 |
|
E Plx |
0.77 |
|
E pmRA |
0.98 |
|
E pmDE |
0.5 |
|
Hpmag |
5.5035 |
|
E Hpmag |
0.0006 |
|
SHp |
0.005 |
|
VA |
0 |
|
BV |
0.642 |
|
E BV |
0.018 |
|
VI |
0.73 |
|
Ccdm |
09278-0604 |
|
RComp |
|
|
Comp |
A |
|
Note1 |
|
|
Note2 |
|
|
Discov num |
|
|
DRAs |
-1.19 |
|
DDEs |
-16.0 |
|
R dRAs |
10 |
|
Year |
|
|
Theta |
|
|
Rho |
|
|
Obs |
2 |
|
Vmag |
6.2 |
|
Sp |
G0 |
|
PmNote |
* |
|
PmRA |
-227 |
|
PmDE |
-78 |
|
Dm number |
-05 2802 |
|
Cat1 |
BD |
|
Name2 |
136872 |
|
Cat2 |
SAO |
|
HD |
81809 |
|
M HD |
|
|
ADS BDS |
|
|
M ADS BDS |
|
|
N IDS |
|
|
IDS |
09228S0538A |
|
HIC |
46404 |
|
09278-0604 B
Componente originario normalizzato |
AB |
|
Coord arcsec 2000 |
092746.79-060416.6 |
|
Mag |
7.52 |
|
PmRA |
-227.00 |
|
PmDE |
-77.0 |
|
Calc delta mag |
1.89 |
|
Calc coord |
yes |
|
Ccdm |
09278-0604 |
|
RComp |
|
|
Comp |
B |
|
Note1 |
* |
|
Note2 |
|
|
Discov num |
B 2530 |
|
DRAs |
|
|
DDEs |
|
|
R dRAs |
|
|
Year |
1960 |
|
Theta |
153 |
|
Rho |
0.4 |
|
Obs |
9 |
|
Vmag |
7.0 |
|
Sp |
|
|
PmNote |
|
|
PmRA |
|
|
PmDE |
|
|
Dm number |
|
|
Cat1 |
|
|
Name2 |
|
|
Cat2 |
|
|
HD |
|
|
M HD |
|
|
ADS BDS |
|
|
M ADS BDS |
N |
|
N IDS |
|
|
IDS |
09228S0538B |
|
HIC |
46404 |
|