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Current system
04170+1941
HO 328
HD 27028


Nearby doubles
8' : 04174+1945
LDS5536

24' : 04154+1948
UC 1142

31' : 04175+1911
A 2350

32' : 04167+1909
LDS5530

46' : 04201+1953
LDS1164

47' : 04203+1937
TDS2828

47' : 04157+1858
OCC 432

49' : 04162+1853
GWP 573

54' : 04174+2033
KPP3562

55' : 04173+2035
LDS5535AB

60' : 04128+1937
KOH 4

61' : 04128+1954
NI 11

66' : 04124+1948
KPP2510

68' : 04217+1928
BU 9004

68' : 04153+2044
KOH 6

69' : 04218+1949
KNT 2

69' : 04218+1929
SIG 1

71' : 04220+1932
GHE 6AB

72' : 04157+2049
TOK 659AB

72' : 04221+1934
KOH 9AB

76' : 04221+2007
LDS3581

77' : 04119+1918
LDS5516

81' : 04216+2029
LDS5543AB

82' : 04203+1833
LDS5540AB

85' : 04208+1835
GKM9090AB

90' : 04210+2050
LDS3578



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

04170+1941 HO 328 (HD 27028)

 
 
04h 17m 01.22s +19° 40' 32.6" P.A. 352.00 sep 0.4 mag 7.38,9.06 Sp F5V dist. 84.53 pc (275.74 l.y.)
 
 
Coord 2000 04170+1941 Discov num HO  328 Comp Coord arcsec 2000 04 17 01.22 +19 40 32.6
Date first 1890 Date last 2022 Obs 98
Pa first 356 Pa last 352.4 P.A. Now (θ) 350.8°
Sep first 0.4 Sep last 0.367 Sep. Now (ρ) 0.317"
Mag pri 7.38 Mag sec 9.06 delta mag (ΔM) 1.68 Spectral class F5V (yellow-white)
Pri motion ra +001 Sec motion ra +001
Pri motion dec -101 Sec motion dec -101
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 27028 Constellation Taurus SAO 93840 HIP 19975
Tycho2 1272-00227-1 Gaia DR2 48622263902636928 HD 27028 ADS 3102
BD BD+19 689 Distance 84.53 Distance ly 275.74
 
 
ORBITAL ELEMENTS
 
 
Period (P)62.89y± 0.25 Periastron (T)1970.848y± 0.32 Semi-major axis (a)0.243a± 0.012
Eccentricity (e)0.964± 0.0032 Inclination (i)178.6°± 5.7 Longitude of periastron (ω)258.6°± 3.5
Node (Ω)82.3°± 7.6 Notesn ReferenceSca2025a
Equinox Last observation2024 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 4.6 0.476
2001 4.2 0.477
2002 3.8 0.477
2003 3.4 0.477
2004 3.0 0.476
2005 2.6 0.475
2006 2.2 0.473
2007 1.8 0.470
2008 1.4 0.467
2009 1.0 0.463
2010 0.6 0.459
2011 0.2 0.454
2012 359.7 0.448
2013 359.3 0.442
2014 358.8 0.434
2015 358.3 0.426
2016 357.8 0.418
2017 357.3 0.408
2018 356.7 0.398
2019 356.1 0.387
2020 355.5 0.375
2021 354.9 0.362
2022 354.1 0.348
2023 353.4 0.333
2024 352.5 0.316
2025 351.6 0.298
2026 350.5 0.279
2027 349.2 0.258
2028 347.8 0.235
2029 345.9 0.209
2030 343.6 0.181
2031 340.2 0.148
2032 334.8 0.110
2033 321.8 0.061
2034 69.4 0.029
2035 37.0 0.089
2036 29.4 0.131
2037 25.3 0.166
2038 22.5 0.196
2039 20.5 0.223
2040 18.8 0.247
2041 17.5 0.269
2042 16.3 0.289
2043 15.3 0.308
2044 14.4 0.325
2045 13.6 0.341
2046 12.9 0.355
2047 12.2 0.369
2048 11.6 0.381
2049 11.0 0.393
2050 10.4 0.404


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds04170%2B1941b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS 04170+1941 HO 328 (HD 27028) : NOTES
 
 
discov_num notes refcode
HO 328 Only elements P and T in the Starikova (1980) orbit were amended from Sta1980b
the orbit of Heintz (1978). Hei1978a
Additional notes may be found in Van Biesbroeck (1954) and VBs1954
Couteau (1963). Cou1963a
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 6.92 +/- 2.37, 2.74, and 1.20 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Cou1963a Ma j Couteau, P. 1963JO.....46..155C
Cou1963a +Mc J. Obs. 46, 155, 1963
Hei1978a orb - Heintz, W.D. 1978ApJS...37...71H
Hei1978a ApJS 37, 71, 1978
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Sca2025a orb - Scardia, M., Prieur, J.-L., Ling, J.F., Pansecchi, L., Argyle, R.W., Aristidi, E., 2025IAUDS.215....1S
Sca2025a Piccotti, L., Maccarini, L., Abe, L., Bendjoya, P., Rivet, J.-P. & Vernet, D.
Sca2025a Inf. Circ. 215, 1, 2025
Sta1980b orb - Starikova, G.A. 1980ATsir1097....5S
Sta1980b Astron. Tsirk. #1097, 5, 1980
VBs1954 Ma - Van Biesbroeck, G. 1954PYerO...8....6V
VBs1954 +Mb Pub. Yerkes Obs. 8, pt. 6, 1954
VBs1954 +orb
 
 
DISCOVERER
 
 
discov author
COU Couteau, P.
SCA Scardia, M., Prieur, J.-L., Sala, M., Ghigo, M., Koechlin, L., Aristidi, E.,
SCA & Mazzoleni, F.
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Sala, M., Ghigo, M.,
SCA Koechlin, L., & Aristidi, E.
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Basso, S., Sala, M.,
SCA Ghigo, M., Koechlin, L., & Aristidi, E.
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Sala, M., Basso, S.,
SCA Ghigo, M., Koechlin, L., & Aristidi, E.
SCA Scardia, M., Pansecchi, L., Ragazzoni, R., Cecconi, M., Desidera, S.,
SCA Farinato, J., Fiorenzano, A., & Ghedina, A.
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Spano, P., Riva, M.,
SCA & Landoni, M.
SCA Scardia, M., Prieur, J.-L., Rivet, Vernet, Pansecchi, L., Argyle, R.W.,
SCA Aristidi, E., Abe, Bendoya, Combier-Dimur, & Suarez
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Aristidi, E., Abe,
SCA Bendoya, Combier-Dimur, Rivet, Suarez, & Vernet
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Ling, J.F., Zanutta, A.,
SCA Aristidi, E., Abe, Bendoya, Combier-Dimur, Rivet, Suarez, & Vernet
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Ling, J.F., Aristidi, E.,
SCA Zanutta, A., Abe, Bendoya, Combier-Dimur, Rivet, Suarez, & Vernet
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Ling, J.F., Zanutta, A.,
SCA Aristidi, E., Abe, Bendoya, Combier-Dimur, Rivet, Suarez, & Vernet
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Ling, J.F., Aristidi, E.,
SCA Zanutta, A.Abe, Bendoya, Combier-Dimur, Rivet, Suarez, & Vernet
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Ling, J.F., Aristidi, E.,
SCA Inf. Circ. 196, 2, 2018
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Ling, J.F., Argyle, R.W., Aristidi, E.,
SCA Zanutta, A., Abe, Bendjoya, Rivet, Suarez, & Vernet
SCA Scardia, M., Rivet, J.-P., Prieur, J.L., Pansecchi, L., Argyle, R.W., Ling, J.F.,
SCA Aristidi, E., Zanutta, A., Vernet, D., Abe, L., Bendjoya, P., Dimur, C. & Suarez, O.
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Ling, J.F., Argyle, R.W., Aristidi, E.,
SCA Scardia, M.
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Ling, J.F., Argyle, R.W., Aristidi, E.,
SCA Inf. Circ. 201, 1, 2020
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Ling, J.F., Argyle, R.W., Aristidi, E.,
SCA Inf. Circ. 202, 1, 2020
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Ling, J.F., Argyle, R.W., Aristidi, E.,
SCA Zanutta, A., Abe, Bendjoya, Rivet, Vernet, & Maccarini
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Ling, J.F., Argyle, R.W., Aristidi, E.,
SCA Zanutta, A., Abe, Bendjoya, Rivet, Vernet, & Maccarini
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Ling, J.F., Argyle, R.W., Aristidi, E.,
SCA Zanutta, A., Abe, Bendjoya, Rivet, Vernet, & Maccarini
SCA Scardia, M., Prieur, J.-L., Pansecchi, L., Ling, J.F., Argyle, R.W., Aristidi, E.,
SCA Zanutta, A., Abe, Bendjoya, Rivet, Vernet, & Maccarini
SCA Scardia, M., Prieur, J.-L., Ling, J.F., Pansecchi, L., Argyle, R.W., Aristidi, E.,
SCA Zanutta, A., Abe, Bendjoya, Rivet, Vernet, & Maccarini
SCA Scardia, M., Prieur, J.-L., Ling, J.F., Pansecchi, L., Argyle, R.W., Aristidi, E.,
SCA Piccotti, Maccarini, Abe, Bendjoya, Rivet, & Vernet
SCA Scardia, M., Prieur, J.-L., Ling, J.F., Pansecchi, L., Argyle, R.W., Aristidi, E.,
SCA Piccotti, L., Maccarini, L., Abe, L., Bendjoya, P., Rivet, J.-P. & Vernet, D.
SCA Scardia, M., Prieur, J.-L., Ling, J.F., Pansecchi, L., Argyle, R.W., Aristidi, E.,
SCA Piccotti, L., Maccarini, L., Abe, L., Bendjoya, P., Rivet, J.-P. & Vernet, D.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr dm_number notes coord_arcsec_2000
04170+1941 HO 328 2001 94 6 0.5 7.38 9.06 F5V +19 689 NOD 041701.22+194032.6
04170+1941 HO 328 2008 95 2 0.5 7.38 9.06 F5V +19 689 NOD 041701.22+194032.6
04170+1941 HO 328 2016 95 358 0.4 7.38 9.06 F5V +19 689 NO 041701.22+194032.6
04170+1941 HO 328 2022 98 352 0.4 7.38 9.06 F5V +19 689 NO 041701.22+194032.6

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 04170+1941 HO 328 (HD 27028) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 04170+1941 HO 328 (HD 27028) : MEASURES
 
 
No records found.

 
 
WDS 04170+1941 (HD 27028) : VIRTUAL EYEPIECE
 
 

04170+1941 HO 328A mag 7.38 Sp F5V 04170+1941 HO 328B sep 0.4 P.A. 352.40 mag 9.06 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 04170+1941 (HD 27028) : ALADIN DSS IMAGE @ 04h 17m 01.22s +19° 40' 32.6"
 
 
 
 
WDS 04170+1941 HO 328 (HD 27028) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

04170+1941 HO 328 distance=0' 04174+1945 LDS5536 distance=8' 04154+1948 UC 1142 distance=24' 04175+1911 A 2350 distance=31' 04167+1909 LDS5530 distance=32' 04201+1953 LDS1164 distance=46' 04203+1937 TDS2828 distance=47' 04157+1858 OCC 432 distance=47' 04162+1853 GWP 573 distance=49' 04174+2033 KPP3562 distance=54' 04173+2035 LDS5535AB distance=55' 04173+2035 LDS5535AC distance=55' 04128+1937 KOH 4 distance=60' 04128+1954 NI 11 distance=61' 04124+1948 KPP2510 distance=66' 04217+1928 BU 9004 distance=68' 04153+2044 KOH 6 distance=68' 04218+1949 KNT 2 distance=69' 04218+1929 SIG 1 distance=69' 04220+1932 GHE 6AB distance=71' 04220+1932 GHE 6A,Ba distance=71' 04220+1932 GHE 6A,Bb distance=71' 04220+1932 NSE 1AC distance=71' 04220+1932 KRS 2Ba,Bb distance=71' 04220+1932 CSE 1AD distance=71' 04157+2049 RED 2BC distance=71' 04157+2049 TOK 659AB distance=72' 04157+2049 CIA 62Aa,Ab distance=72' 04221+1934 KOH 9AB distance=72' 04221+1934 DAE 25AC distance=72' 04221+2007 LDS3581 distance=76' 04119+1918 LDS5516 distance=77' 04216+2029 LDS5543AB distance=81' 04216+2029 SKF1934Aa,Ab distance=81' 04203+1833 LDS5540AB distance=82' 04203+1833 LDS5540AC distance=82' 04208+1835 GKM9090Aa,Ab distance=85' 04208+1835 GKM9090AB distance=85' 04180+1815 CIA 63Aa,Ab distance=87' 04210+2050 LDS3578 distance=90' 04121+1844 LDS5518 distance=90' 04196+2104 HDS 553 distance=91' 04207+2056 LDS2226 distance=92' 04200+1820 LDS2225 distance=93' 04222+1844 SLE 270 distance=93' 04106+2002 NI 10 distance=93' 04135+1813 BPM 95 distance=101' 04190+2118 BU 1234 distance=102' 04224+2049 BU 87 distance=103' 04242+1959 LDS3583 distance=103' 04215+2102 OCC 684 distance=104' grafico limitrofi
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 04170+1941 HO 328 352 0.4 0
Show 04174+1945 LDS5536 357 12.1 8
Show 04154+1948 UC 1142 105 55.6 24
Show 04175+1911 A 2350 127 0.6 31
Show 04167+1909 LDS5530 199 34.7 32
Show 04201+1953 LDS1164 139 30.2 46
Show 04203+1937 TDS2828 264 3.1 47
Show 04157+1858 OCC 432 -1 0.0 47
Show 04162+1853 GWP 573 236 163.2 49
Show 04174+2033 KPP3562 156 6.2 54
Show 04173+2035 LDS5535 AB 299 180.7 55
Show 04173+2035 LDS5535 AC 157 6.0 55
Show 04128+1937 KOH 4 34 2.6 60
Show 04128+1954 NI 11 229 5.3 61
Show 04124+1948 KPP2510 248 22.5 66
Show 04217+1928 BU 9004 46 55.8 68
Show 04153+2044 KOH 6 357 0.6 68
Show 04218+1949 KNT 2 25 3.3 69
Show 04218+1929 SIG 1 75 0.2 69
Show 04220+1932 GHE 6 AB 191 0.7 71
Show 04220+1932 GHE 6 A,Ba 195 0.7 71
Show 04220+1932 GHE 6 A,Bb 195 0.6 71
Show 04220+1932 NSE 1 AC 358 0.3 71
Show 04220+1932 KRS 2 Ba,Bb 20 0.1 71
Show 04220+1932 CSE 1 AD 199 0.1 71
Show 04157+2049 RED 2 BC 187 0.9 71
Show 04157+2049 TOK 659 AB 252 144.8 72
Show 04157+2049 CIA 62 Aa,Ab 2 0.0 72
Show 04221+1934 KOH 9 AB 317 12.0 72
Show 04221+1934 DAE 25 AC 187 7.7 72
Show 04221+2007 LDS3581 179 14.4 76
Show 04119+1918 LDS5516 202 14.2 77
Show 04216+2029 LDS5543 AB 89 113.6 81
Show 04216+2029 SKF1934 Aa,Ab 224 1.2 81
Show 04203+1833 LDS5540 AB 266 264.2 82
Show 04203+1833 LDS5540 AC 266 306.8 82
Show 04208+1835 GKM9090 Aa,Ab 115 0.1 85
Show 04208+1835 GKM9090 AB 113 2.6 85
Show 04180+1815 CIA 63 Aa,Ab 318 0.0 87
Show 04210+2050 LDS3578 351 44.4 90
Show 04121+1844 LDS5518 316 29.4 90
Show 04196+2104 HDS 553 23 0.8 91
Show 04207+2056 LDS2226 5 21.1 92
Show 04200+1820 LDS2225 229 5.8 93
Show 04222+1844 SLE 270 98 11.0 93
Show 04106+2002 NI 10 228 3.5 93
Show 04135+1813 BPM 95 9 32.3 101
Show 04190+2118 BU 1234 207 1.9 102
Show 04224+2049 BU 87 168 1.9 103
Show 04242+1959 LDS3583 296 29.0 103
Show 04215+2102 OCC 684 -1 0.1 104

 
 
WDS 04170+1941 : COMPONENTS
 
 
  A
B pa=352.4°
sep=0.37"
 
 
04170+1941 A
 
 
Name HD 27028 Coord arcsec 2000 041701.22+194032.6 Mag 7.38 Spectral class F5V (yellow-white)
PmRA 1.00 PmDE -101.0 SAO 93840 HIP 19975
Tycho2 1272-00227-1 HD 27028 BD BD+19 689
Tycho2
Tycho2 1272-00227-1 Pflag RAmdeg 64.25509696 DEmdeg 19.67572783
PmRA 1.4 PmDE -100.8 E RAmdeg 6 E DEmdeg 6
E pmRA 1.4 E pmDE 1.3 EpRAm 1991.30 EpDEm 1991.25
Num 9 Q RAmdeg 1.2 Q DEmdeg 1.3 Q pmRA 1.1
Q pmDE 1.2 BTmag 7.658 E BTmag 0.017 VTmag 7.201
E VTmag 0.012 Prox 999 TYC T HIP 19975
CCDM AB RAdeg 64.25509361 DEdeg 19.67595972 EpRA 1990 1.72
EpDE 1990 1.72 E RAdeg 5.8 E DEdeg 5.8 Posflg P
Corr -0.3
SAO
SAO 93840 DelFlag RA1950 PmRA1950 0.0003
DE1950 PmDE1950 -0.114 Vmag 7.5 SpType F5
Double code Source 28 CatNum 1121 DM BD+19 689
DMcomp BDsup HD 27028 M HD 0
GC RA1950rad 1.10872763 DE1950rad 0.3412911 PmRA2000 0.0002
PmDE2000 -0.115
Hipparcos
Catalog H HIP 19975 Proxy H RAhms 04 17 01.22
DEdms +19 40 33.4 Vmag 7.12 VarFlag R Vmag H
RAdeg 64.2551 DEdeg 19.6759 AstroRef A Plx 10.42
CCDM 3.48 - N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 9 Rho 0.448 HD BD BD+19 689
CD CP Dm number +19 689 VIred 0.49
SpType F5 R SpType Coord arcsec 2000 041701.22+194033.4
Hipparcos 2
HIP 19975 Sn 15 So 3 Nc 2
RArad 1.1214628209 DErad 0.3434098591 Plx 11.83 PmRA 3.6
PmDE -104.43 E RArad 0.86 E DErad 0.75 E Plx 0.84
E pmRA 1.03 E pmDE 1 Hpmag E Hpmag 0.0012
SHp 0.009 VA 0 BV 0.444 E BV 0.014
VI 0.51
CCDM
Ccdm 04170+1941 RComp Comp A Note1
Note2 Discov num DRAs 1.28 DDEs -27.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 8.4 Sp F5 PmNote *
PmRA 17 PmDE -102 Dm number +19 689 Cat1 BD
Name2 +19 328 Cat2 AGK2/3 HD 27028 M HD
ADS BDS A 3102 M ADS BDS N IDS IDS 04112N1926A
HIC 19975
 
 
04170+1941 B
 
 
Coord arcsec 2000 041701.22+194033.0 Mag 9.06 PmRA 1.00 PmDE -101.0
Delta magnitude 1.68 Coordinate calculated yes
CCDM
Ccdm 04170+1941 RComp Comp B Note1 *
Note2 Discov num HO 328 DRAs DDEs
R dRAs Year 1890 Theta Rho
Obs 99 Vmag 8.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 3102 M ADS BDS N IDS IDS 04112N1926B
HIC 19975