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Current system
04549+1009
ENG 19 AB
Pi1 Ori


Nearby doubles
8' : 04545+1015
LDS6144

31' : 04541+0936
HEI 644

40' : 04570+0945
GRV 221

50' : 04582+1000
SKF1833AB

52' : 04523+0935
AHD 32

61' : 04511+1029
LDS6142

61' : 04554+0909
LDS6145

64' : 04561+0908
BU 404

65' : 04585+0930
LDS3631

66' : 04576+1059
GRV 222

73' : 04530+1116
HJL 63

74' : 04513+0919
GWP 622

75' : 04527+1117
LDS5621

77' : 04548+1126
MCA 17

78' : 05000+1023
STF 626AB

78' : 04512+1104
BU 883AB

81' : 05003+0958
DAM 271

84' : 04499+0929
DAM1323

85' : 04590+0910
TDS3025

89' : 04497+0926
LDS5612

91' : 04448+1003
TSN 129

93' : 05010+1025
LDS5643

94' : 04549+0836
STT 90AB

97' : 04591+1123
BPM 112

97' : 04592+1122
LDS6154

99' : 04570+0835
AOT 18



Selections
Full WDS
Binocular doubles
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.

04549+1009 ENG 19 AB (Pi1 Ori)

 
 
04h 54m 53.72s +10° 09' 02.9" P.A. 254.00 sep 171.6 mag 4.66,8.95 Sp A0V dist. 35.66 pc (116.32 l.y.)
 
 
Coord 2000 04549+1009 Discov num ENG  19 Comp AB Coord arcsec 2000 04 54 53.72 +10 09 02.9
Date first 1887 Date last 2014 Obs 20
Pa first 248 Pa last 253.5 P.A. Now (θ) 253.5°
Sep first 171.8 Sep last 171.605 Sep. Now (ρ) 171.605"
Mag pri 4.66 Mag sec 8.95 delta mag (ΔM) 4.29 Spectral class A0V (white)
Pri motion ra +042 Sec motion ra +002
Pri motion dec -129 Sec motion dec -011
Notes N (See Notes)
rPM=0.918
This double is not physical.
 
 
04549+1009 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Pi1 Ori 94201 04 54 54 +10 09 03 ENG 19 AB 2014 20 254 171.6 4.66 8.95 4.29 <===
Show 94201 04 54 54 +10 09 03 BUP 72 AC 2015 7 357 45.7 4.66 12.70 8.04
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Pi1 Ori Constellation Orion SAO 94201 HIP 22845
Tycho2 0688-01867-1 Gaia DR2 3294429586085336960 HD 31270 HR 1570
GC 5987 BD BD+09 683 Bayer Pi 1 Orionis Bayer name Pi1 Ori
Flamsteed 7 Orionis Flamsteed name 7 Ori Distance 35.66 Distance ly 116.32
Bayer greek π1 Ori
 
 
WDS 04549+1009 ENG 19 AB (Pi1 Ori) : NOTES
 
 
discov_num notes refcode
ENG 19 7 Ori = pi 1 Ori. B is BD+09@682.
 
 
REFERENCES
 
 
refcode metd author reference
BUP Burnham proper motion stars (see Burnham, Carnegie Inst. Wash. #168, 1913) 1913QB811.B8.......
ENG (Note: Some time after publication of the IDS, the designation for Engelmann was
ENG changed from EN to ENG and that for Engelhardt from ENG to ENH. This has led to
ENG considerable confusion between the two. All but three of the ENG pairs in the WDS
ENG (ENG 21, 39, and 68) were actually discovered by Engelhardt. These pairs were
ENG not renamed, however, in order to avoid confusion with already published measures)
Eng1865 Ma - Engelmann, R. .
Eng1865 Messungen Neunzig Doppelsternen, 1865
Eng1865b Ma - Engelmann, R. 1865AN.....64...81E
Eng1865b AN 64, 81, #1518, 1865
Eng1868 Ma j Engelmann, R. 1868AN.....70..257E
Eng1868 AN 70, 257, 1868
Eng1868b Ma j Engelmann, R. 1868AN.....71..235B
Eng1868b AN 71, 253, #1696, 1868
Eng1875A Ma - Engelmann, R. 1875AN.....85..323D
Eng1875A cited by Doberck, 1875 (see Dob1875b,f,g,h)
Eng1882 Ma j Engelmann, R. .
Eng1882 Pub. K. Univ. Sternwarte Leipzig, Heft 1, 33, 1882
Eng1882 (Most data were published in AN 70, 257, 1868. Some of the remaining measures 1868AN.....70..257E
Eng1882 were too discrepant, so not added to WDS)
Eng1885a Ma - Engelmann, R. 1885AN....111..337E
Eng1885a AN 111, 337, 1885
Eng1885b Ma j Engelmann, R. 1885AN....112..193E
Eng1885b AN 112, 193, 1885
Eng1886 Ma - Engelmann, R. 1886AN....115...81E
Eng1886 AN 115, 81, 1886
Eng1887 Ma - Engelmann, R. 1887AN....117...17E
Eng1887 AN 117, 17, 1887
Eng1905A Ma - Engelmann, R. 1905LicOB...3..147A
Eng1905A cited by Aitken (Lick Obs. Bull. 3, 147, 1905)
Eng1906A Ma - Engelmann, R. 1906MmRAS..56....1L
Eng1906A cited by Lewis (MemRAS 56, 1, 1906)
Eng1913A Ma - Engelmann, R. 1913QB811.B8.......
Eng1913A cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Eng1937A Ma - Engelmann, R. 1937AnLei..18....1S
Eng1937A cited by Strand (Ann. Sterrew. Leiden 18, 1937)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
04549+1009 ENG 19 AB 2002 12 254 171.8 4.66 8.95 A0V N D 045453.72+100902.9
04549+1009 ENG 19 AB 2010 16 253 172.0 4.66 8.95 A0V N D 045453.72+100902.9
04549+1009 ENG 19 AB 2011 17 254 171.8 4.66 8.95 A0V N D 045453.72+100902.9
04549+1009 ENG 19 AB 2014 20 254 171.6 4.66 8.95 A0V N 045453.72+100902.9

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

 
 
WDS 04549+1009 ENG 19 AB (Pi1 Ori) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 04549+1009 ENG 19 AB (Pi1 Ori) : MEASURES
 
 
No records found.

 
 
WDS 04549+1009 (Pi1 Ori) : VIRTUAL EYEPIECE
 
 

04549+1009 ENG 19A mag 4.66 Sp A0V 04549+1009 ENG 19B sep 169.1 P.A. 253.30 mag 8.95 04549+1009 BUP 72C sep 45.7 P.A. 357.00 mag 12.7 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 04549+1009 (Pi1 Ori) : ALADIN DSS IMAGE @ 04h 54m 53.72s +10° 09' 02.9"
 
 
 
 
WDS 04549+1009 ENG 19 AB (Pi1 Ori) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

04549+1009 ENG 19AB distance=1' 04549+1009 BUP 72AC distance=1' 04545+1015 LDS6144 distance=8' 04541+0936 HEI 644 distance=31' 04570+0945 GRV 221 distance=40' 04582+1000 SKF1833AB distance=50' 04582+1000 TDS 156BC distance=51' 04523+0935 AHD 32 distance=52' 04511+1029 LDS6142 distance=61' 04554+0909 LDS6145 distance=61' 04561+0908 BU 404 distance=64' 04585+0930 LDS3631 distance=65' 04576+1059 GRV 222 distance=66' 04530+1116 HJL 63 distance=73' 04513+0919 GWP 622 distance=74' 04527+1117 LDS5621 distance=75' 04504+0934 SKF1831A,BC distance=76' 04504+0934 A 2039BC distance=76' 04548+1126 MCA 17 distance=77' 05000+1023 FYM 215BE distance=77' 05000+1023 STF 626AB distance=78' 05000+1023 SIN 11AC distance=78' 05000+1023 SIN 11AD distance=78' 04512+1104 BU 883AB distance=78' 04512+1104 BU 883AB,C distance=78' 05003+0958 DAM 271 distance=81' 04499+0929 DAM1323 distance=84' 04590+0910 TDS3025 distance=85' 04497+0926 LDS5612 distance=89' 04448+1003 TSN 129 distance=91' 05010+1025 LDS5643 distance=93' 04549+0836 STT 90AB distance=94' 04549+0836 STT 90AC distance=94' 04549+0836 STT 90CD distance=94' 04591+1123 BPM 112 distance=97' 04592+1122 LDS6154 distance=97' 04570+0835 AOT 18 distance=99' 04532+0833 A 2040 distance=99' 04595+1120 LDS5637 distance=101' 05019+1006 LDS6157 distance=103' 05019+1021 LDS3635 distance=105' 05020+0959 HDS 654 distance=106' 04485+1056 HJ 684AB distance=106' 04485+1056 HJ 684AC distance=106' 04485+1056 ABH 25AF distance=106' 04485+1056 ABH 25AG distance=106' 04485+1056 HJ 684AE distance=106' 04485+1056 HJ 684CD distance=106' 04485+1056 HJ 684CE distance=106' 04559+0824 AOT 17 distance=106' 04543+1156 LDS5623 distance=108' 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 04549+1009 ENG 19 AB 254 171.6 1
Show 04549+1009 BUP 72 AC 357 45.7 1
Show 04545+1015 LDS6144 184 39.8 8
Show 04541+0936 HEI 644 274 1.7 31
Show 04570+0945 GRV 221 66 11.6 40
Show 04582+1000 SKF1833 AB 56 33.7 50
Show 04582+1000 TDS 156 BC 99 1.7 51
Show 04523+0935 AHD 32 80 23.6 52
Show 04511+1029 LDS6142 202 24.2 61
Show 04554+0909 LDS6145 71 4.5 61
Show 04561+0908 BU 404 290 1.8 64
Show 04585+0930 LDS3631 226 31.2 65
Show 04576+1059 GRV 222 270 6.4 66
Show 04530+1116 HJL 63 245 30.1 73
Show 04513+0919 GWP 622 109 27.4 74
Show 04527+1117 LDS5621 301 71.9 75
Show 04504+0934 SKF1831 A,BC 320 53.3 76
Show 04504+0934 A 2039 BC 298 0.1 76
Show 04548+1126 MCA 17 14 0.4 77
Show 05000+1023 FYM 215 BE 202 36.2 77
Show 05000+1023 STF 626 AB 242 24.2 78
Show 05000+1023 SIN 11 AC 108 90.1 78
Show 05000+1023 SIN 11 AD 260 114.8 78
Show 04512+1104 BU 883 AB 99 0.1 78
Show 04512+1104 BU 883 AB,C 190 14.7 78
Show 05003+0958 DAM 271 39 10.1 81
Show 04499+0929 DAM1323 32 8.7 84
Show 04590+0910 TDS3025 271 0.5 85
Show 04497+0926 LDS5612 220 187.2 89
Show 04448+1003 TSN 129 103 0.1 91
Show 05010+1025 LDS5643 96 233.9 93
Show 04549+0836 STT 90 AB 339 1.8 94
Show 04549+0836 STT 90 AC 97 39.5 94
Show 04549+0836 STT 90 CD 320 11.8 94
Show 04591+1123 BPM 112 119 116.5 97
Show 04592+1122 LDS6154 195 10.4 97
Show 04570+0835 AOT 18 327 5.1 99
Show 04532+0833 A 2040 257 2.9 99
Show 04595+1120 LDS5637 82 256.6 101
Show 05019+1006 LDS6157 158 1.9 103
Show 05019+1021 LDS3635 162 45.9 105
Show 05020+0959 HDS 654 143 1.4 106
Show 04485+1056 HJ 684 AB 264 24.3 106
Show 04485+1056 HJ 684 AC 212 46.8 106
Show 04485+1056 ABH 25 AF 207 17.3 106
Show 04485+1056 ABH 25 AG 233 145.9 106
Show 04485+1056 HJ 684 AE 240 77.9 106
Show 04485+1056 HJ 684 CD 308 10.1 106
Show 04485+1056 HJ 684 CE 271 42.8 106
Show 04559+0824 AOT 17 150 37.2 106
Show 04543+1156 LDS5623 284 87.6 108

 
 
WDS 04549+1009 : COMPONENTS
 
 
  A B
B pa=253.3°
sep=169.14"
 
C pa=357.0°
sep=45.68"
pa=59.4°
sep=185.41"
 
 
04549+1009 A
 
 
Name Pi1 Ori Coord arcsec 2000 045453.72+100902.9 Mag 4.66 Spectral class A0V (white)
PmRA 42.00 PmDE -129.0 SAO 94201 HIP 22845
Tycho2 0688-01867-1 HD 31295 HR 1570 GC 5987
BD BD+09 683 Bayer Pi 1 Orionis Bayer name Pi1 Flamsteed 7 Orionis
Flamsteed name 7 Ori
Tycho2
Tycho2 0688-01867-1 Pflag RAmdeg 73.72386559 DEmdeg 10.15083236
PmRA 40.8 PmDE -128.9 E RAmdeg 3 E DEmdeg 4
E pmRA 0.8 E pmDE 0.8 EpRAm 1991.61 EpDEm 1990.76
Num 14 Q RAmdeg 0.3 Q DEmdeg 0.8 Q pmRA 0.5
Q pmDE 0.8 BTmag 4.749 E BTmag 0.014 VTmag 4.659
E VTmag 0.009 Prox 999 TYC T HIP 22845
CCDM RAdeg 73.72377139 DEdeg 10.15114972 EpRA 1990 1.80
EpDE 1990 1.13 E RAdeg 3.2 E DEdeg 3.5 Posflg
Corr 0.0
SAO
SAO 94201 DelFlag RA1950 PmRA1950 0.003
DE1950 PmDE1950 -0.13 Vmag 4.7 SpType A0
Double code Source 70 CatNum 5987 DM BD+09 683
DMcomp BDsup HD 31295 M HD 0
GC 5987 RA1950rad 1.27470413 DE1950rad 0.1758057 PmRA2000 0.0031
PmDE2000 -0.132
Hipparcos
Catalog H HIP 22845 Proxy RAhms 04 54 53.70
DEdms +10 09 04.1 Vmag 4.64 VarFlag R Vmag G
RAdeg 73.7238 DEdeg 10.1511 AstroRef Plx 27.04
CCDM 04548+1009 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 31295 BD BD+09 683
CD CP Dm number +09 683 VIred 0.11
SpType A0V R SpType Coord arcsec 2000 045453.70+100904.1
Hipparcos 2
HIP 22845 Sn 5 So 0 Nc 1
RArad 1.2867224783 DErad 0.1771709011 Plx 28.04 PmRA 41.49
PmDE -128.73 E RArad 0.2 E DErad 0.13 E Plx 0.25
E pmRA 0.26 E pmDE 0.16 Hpmag 4.6861 E Hpmag 0.0005
SHp 0.004 VA 0 BV 0.085 E BV 0.004
VI 0.11
 
 
04549+1009 B
 
 
Coord arcsec 2000 045442.75+100814.2 Mag 8.95 PmRA 2.00 PmDE -11.0
SAO 94195 Tycho2 0688-00644-1 HD 31270 DM BD+09 682
Calc delta mag 4.29 Calc coord yes
Tycho2
Tycho2 0688-00644-1 Pflag RAmdeg 73.67759779 DEmdeg 10.13687922
PmRA 4.1 PmDE -11.8 E RAmdeg 8 E DEmdeg 10
E pmRA 1.1 E pmDE 1.2 EpRAm 1990.46 EpDEm 1989.36
Num 15 Q RAmdeg 0.9 Q DEmdeg 1.2 Q pmRA 0.9
Q pmDE 1.1 BTmag 9.289 E BTmag 0.020 VTmag 8.947
E VTmag 0.016 Prox 999 TYC T HIP
CCDM RAdeg 73.67758833 DEdeg 10.13690806 EpRA 1990 1.69
EpDE 1990 1.24 E RAdeg 8.2 E DEdeg 11.3 Posflg
Corr -0.1
SAO
SAO 94195 DelFlag RA1950 PmRA1950 0.0006
DE1950 PmDE1950 -0.016 Vmag 8.7 SpType A
Double code Source 33 CatNum 1864 DM BD+09 682
DMcomp BDsup HD 31270 M HD 0
GC RA1950rad 1.27390766 DE1950rad 0.17552996 PmRA2000 0.0007
PmDE2000 -0.018
 
 
04549+1009 C
 
 
Coord arcsec 2000 045453.56+100948.5 Mag 12.7 Calc delta mag 8.04 Calc coord yes