NGC 1976

Number of stars per data source

	Reference   18 :   18 stars
	Reference   41 :    7 stars
	Reference   43 :    4 stars
	Reference   56 :    1 star
	Reference   73 :   27 stars
	Reference   87 :   10 stars
	Reference   88 :    1 star
	Reference   92 :    3 stars
	Reference   94 :   31 stars
	Reference   96 :    1 star
	Reference   98 :    2 stars
	Reference  108 :   55 stars
	Reference  115 :   33 stars
	Reference  121 :    7 stars
	Reference  202 :    6 stars
	Reference  208 :    8 stars
	Reference  211 :    1 star
	Reference  275 :    1 star
	Reference  295 :   36 stars
	Reference  305 :   15 stars
	Reference  330 :    3 stars
	Reference  342 :    3 stars
	Reference  409 :    1 star
	Reference  418 :    3 stars
	Reference  478 :    1 star
	Reference  481 :   16 stars
	Reference  521 :    4 stars
	Reference  543 :    4 stars
	Reference  556 :    7 stars
	Reference  561 :   25 stars
	Reference  567 :   47 stars
	Reference  712 :    2 stars
	Reference  713 :    1 star
	Reference  721 :    2 stars
	Reference  772 :    1 star
	Reference  781 :    1 star
	Reference  825 :    2 stars
	Reference  831 :    2 stars
	Reference  948 :    3 stars
	Reference  951 :    3 stars
	Reference  956 :   28 stars
	Reference  963 :    1 star
	Reference  980 :    1 star
	Reference  982 :    4 stars
	Reference 1032 :    1 star

References

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A study of the Orion aggregate of early-type stars
1952ApJ...116..251S
 41
Strand K.A.
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Stellar motions in the Orion nebula cluster
1958ApJ...128...14S
 43
Crawford D.L.
(1958) Astrophys. J. 128, 185
Two-dimensional spectral classifications by narrow-band photometry for B stars in clusters and associations
1958ApJ...128..185C
 56
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Cepheids in galactic clusters. VIII. A reinvestigation of U Sgr in M25
1961ApJ...133..895W
 73
Johnson H.M.
(1965) Astrophys. J. 142, 964
The spectral and radial velocities of stars in the Orion nebula cluster
1965ApJ...142..964J
 87
Schild R.E., Chaffee F.H.
(1971) Astrophys. J. 169, 529
Energy distributions and spectra of Orion B stars
1971ApJ...169..529S
 88
Conti P.S., Alschuler W.R.
(1971) Astrophys. J. 170, 325
Spectroscopic studies of O-type stars. I. Classification and absolute magnitudes
1971ApJ...170..325C
 92
Walker M.F.
(1972) Astrophys. J. 175, 89
Studies of extremely young clusters. VI. Spectroscopic observations of the ultraviolet-excess stars in the Orion nebula cluster and NGC 2264
1972ApJ...175...89W
 94
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(1972) Astrophys. J. 175, 765
Metallicism in border regions of the Am domain. I. Extremeley young Am stars in the Orion 1c association
1972ApJ...175..765S
 96
Conti P.S.
(1973) Astrophys. J. 179, 161
Spectroscopic studies of O-type stars. II. Comparison with non-LTE models
1973ApJ...179..161C
 98
Conti P.S., Leep E.M.
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Spectroscopic observations of O-type stars. V. The hydrogen lines and lambda 4686 He II
1974ApJ...193..113C
 108
Walker M.F.
(1983) Astrophys. J. 271, 642
Studies of extremely young clusters. VII. Spectroscopic observations of faint stars in the Orion nebula
1983ApJ...271..642W
 115
Duncan D.K.
(1993) Astrophys. J. 406, 172
Rotation of young solar-type stars in the Orion nebula region
1993ApJ...406..172D
 121
Herbig G.H., Terndrup D.M.
(1986) Astrophys. J. 307, 609
The Trapezium cluster of the Orion nebula
1986ApJ...307..609H
 202
Morgan W.W., Code A.D., Whitford A.E.
(1955) Astrophys. J. Suppl. 2, 41
Studies in galactic structure. II. Luminosity classification for 1270 blue giant stars
1955ApJS....2...41M
 208
Lesh J.R.
(1968) Astrophys. J. Suppl. 17, 371
The kinematics of the Gould Belt: An expanding group?
1968ApJS...17..371L
 211
Walborn N.R.
(1971) Astrophys. J. Suppl. 23, 257
Some spectroscopic characteristics of the OB stars: An investigation of the space distribution of certain OB stars and the reference frame of the classification
1971ApJS...23..257W
 275
Walborn N.R.
(1972) Astron. J. 77, 312
Spectral classification of OB stars in both hemisphere and the absolute-magnitude calibration
1972AJ.....77..312W
 295
McNamara B.J.
(1976) Astron. J. 81, 845
Pre-main-sequence masses and the age spread in the Orion cluster
1976AJ.....81..845M
 305
van Altena W.F., Lee J.T., Lee J.-F., Lu P.K., Upgren A.R.
(1988) Astron. J. 95, 1744
The velocity dispersion of the Orion nebula cluster. I.
1988AJ.....95.1744V
 330
Hillenbrand L.A., Strom S.E., Calvet N., Merrill K.M., Gatley I., Makidon R.B., Meyer M.R., Skrutskie M.K.
(1998) Astron. J. 116, 1816
Circumstellar disks in the Orion nebula cluster
1998AJ....116.1816H
 342
Gray R.O., Corbally C.J.
(1993) Astron. J. 106, 632
A search for Lambda Bootis stars in OB associations
1993AJ....106..632G
 409
Frasca A., Alcala J.M., Covino E., Catalano S., Marilli E., Paladino R.
(2003) Astron. Astrophys. 405, 149
Further identification of ROSAT all-sky survey sources in Orion
2003A&A...405..149F
 418
Levato H.
(1975) Astron. Astrophys. Suppl. 19, 91
Rotational velocities and spectral types for a sample of binary systems
1975A&AS...19...91L
 478
Buscombe W.
(1969) Mon. Not. R. Astr. Soc. 144, 31
Line strengths for southern OB stars - II
1969MNRAS.144...31B
 481
Penston M.V., Hunter J.K., O'Neill A.
(1975) Mon. Not. R. Astr. Soc. 171, 219
Further observations of the Orion nebula cluster
1975MNRAS.171..219P
 521
Greenstein J.L., Struve O.
(1946) Publ. Astr. Soc. Pacific 58, 366
Spectra of variable stars in the Orion nebula
1946PASP...58..366G
 543
Guetter H.H.
(1968) Publ. Astr. Soc. Pacific 80, 197
Spectral classifications of 239 early-type stars
1968PASP...80..197G
 556
Breger M., Rybski P.M.
(1975) Publ. Astr. Soc. Pacific 87, 607
Spectral types of faint Orion stars
1975PASP...87..607B
 561
Levato H., Abt H.A.
(1976) Publ. Astr. Soc. Pacific 88, 712
Spectral types in the Orion nebula cluster
1976PASP...88..712L
 567
Abt H.A., Levato H.
(1977) Publ. Astr. Soc. Pacific 89, 797
Spectral types in the Orion OB1 association
1977PASP...89..797A
 712
Divan L.
(1954) Ann. Astrophys. 17, 456
Recherche sur la loi d'absorption de la poussiere interstellaire et sur le spectre continu des etoiles O et B.
1954AnAp...17..456D
 713
Mannino G., Humblet J.
(1955) Ann. Astrophys. 18, 237
Observations spectroscopiques de quelques etoiles of (I).
1955AnAp...18..237M
 721
Morgan W.W., Keenan P.C.
(1973) Ann. Rev. Astron. Astrophys. 11, 29
Spectral classification
1973ARA&A..11...29M
 772
Borgman J.
(1960) Bull. Astron. Inst. Netherlands 15, 255
Seven-colour photometry of O, B and A stars
1960BAN....15..255B
 781
Bernacca P.L.
(1967) Contr. Oss. Astr. Univ. Padova No 202
On the spectrum-color discrepancy of some late B stars in Orion
 825
Woods M.L.
(1958) Mem. Commonwealth Obs. Mount Stromlo 16, 125
Spectral types of bright southern stars
 831
Feast M.W., Thackeray A.D., Wesselink A.J.
(1955) Mem. R. Astr. Soc. 67, 51
Radial velocities of southern B stars determined at the Radcliffe Observatory
1955MmRAS..67...51F
 948
Ismailov N.Z.
(1988) Soviet Astron. Lett. 14, 138
Analysis of spectra of three stars in the Theta1 Orionis Trapezium
1988SvAL...14..138I
 951
Wenzel W.
(1951) Veroeff. Sternw. Sonneberg 5, 1
Einige Eigenschaften der Unregelmassig veranderlichen Sterne GeringerLeuchtkraft
1951VeSon...5....1W
 956
Morgan W.W., Loden K.
(1964) Vistas Astron. 8, 83
Some characteristics of the Orion association
1964VA......8...83M
 963
Appenzeller I.
(1966) Z. Astrophys. 64, 269
Polarimetrische, photometrische und spectroskopische Beobachtungen von Sternen im Cygnus und Orion
1966ZA.....64..269A
 980
Morgan, W.W., Keenan, P.C., Kellman, E.
(1943) An Atlas of Stellar Spectra. Chicago Univ. Press
 982
Kholopov P.N., Samus N.N., Frolov M.S., Goranskij V.P., Gorynya N.A., et al.
(1985)
General Catalogue of Variable Stars
 1032
Levenhagen R.S., Leister N.V.
(2006) Mon. Not. R. Astron. Soc. 371, 252
Spectroscopic analysis of southern B and Be stars
2006MNRAS.371..252L