O. Naranjo - Academia.edu (original) (raw)
Papers by O. Naranjo
The Williams-MIT collaboration (www.stellaroccultations.info) predicted and observed a stellar oc... more The Williams-MIT collaboration (www.stellaroccultations.info) predicted and observed a stellar occultation of 2UCAC 26260847 (mag 14.35) by KBO 50000 Quaoar (mag 18.9) on 8/9 July 2013. Observations were attempted from a total of five sites in Chile, Venezuela, and Massachusetts. Only one site, Llano del Hato National Astronomical Observatory in Venezuela, had a positive detection of the occultation, giving us a single chord on Quaoar. All other sites were cloudy. The light curve from the 8/9 July 2013 event has been analyzed with the assumption that Quaoar is ellipsoidal or spherical, placing bounds on some of Quaoar’s properties: diameter (> 1138 ± 25 km), density (< 1.82 ± 0.28 g cm-3), and albedo (< 0.14 ± 0.10). An independent prediction of the occultation’s shadow path by Fraser, Gwyn, et al. (2013) suggests that the chord is near-equatorial, which means that our bounds on Quaoar’s properties are closer to estimates. We will compare our result with that of the 11 Febr...
The Astrophysical Journal, 2004
CES Medicina, 2010
Page 1. RU486 JUAN FELIPE FERNANDEZ G., ORLANDO NARANJO C. ,RICARDO NAVIA (II Semestre de Medicin... more Page 1. RU486 JUAN FELIPE FERNANDEZ G., ORLANDO NARANJO C. ,RICARDO NAVIA (II Semestre de Medicina) ... El sangrado puede ser bastante pesado, como un período pesado. Usted puede tener también calambres como dolores característico. ...
The Astronomical Journal, 2006
Monthly Notices of The Royal Astronomical Society, 1980
A theoretical model was constructed for the brightness of comet Encke as a function of heliocentr... more A theoretical model was constructed for the brightness of comet Encke as a function of heliocentric distance, R, using conservation of solar energy, and assuming that C2 molecules are evaporated at the same rate as water molecules. An equation relating the total number of C2 molecules in the coma, and the total visual magnitude, m(V), was used to produce a
It is shown that three supergiant stars have variable radial velocities
![Research paper thumbnail of Discovery of the Bright Trans-Neptunian Object 2000 EB[TINF]173[/TINF]](https://attachments.academia-assets.com/54621640/thumbnails/1.jpg)
](The Astrophysical Journal, 2001
Available from the Minor Planet Center.
Available from the Minor Planet Center.
Available from the Minor Planet Center.
QUEST1 constructed a 16-chip CCD camera to be used on the 1m Schmidt telescope at the Llano del H... more QUEST1 constructed a 16-chip CCD camera to be used on the 1m Schmidt telescope at the Llano del Hato National Astronomical Observatory in Venezuela. Normally operated in the drift-scan mode, an equatorial scan will expose any point on the sky for 143s and result in limiting magnitudes of B=18.5, V=19.2, and R=19.5 at S/N=10. These data were collected between 1999
Revista Mexicana De Astronomia Y Astrofisica - REV MEX ASTRON ASTROFIS, 1987
Se reportan observaciones espectroscópicas del cometa Halley. Los espectros fueron tomados usando... more Se reportan observaciones espectroscópicas del cometa Halley. Los espectros fueron tomados usando el espectrógrafo del telescopio reflector de 1 metro del Observatorio Nacional de Venezuela. Se utilizó óptica azul, con una red de difracción de 600 lineas/min, obteniéndose una dispersión de 74.2 A/mm y una resolución de 2.5 A, en el rango espectral de 3500 a 6500 A. Seis placas fueron tomadas con emulsión IIa-O y dos con IIa-D. Los tiempos de exposición fueron entre 10 y 150 minutos. El cometa se encontraba entre 0.70 y 1.04 UA del Sol, y entre 1.28 y 0.73 UA de la Tierra. Las emisiones más prominentes en el espectro, son las del CN, C2, y C3. Otras emisiones detectadas corresponden a CH, NH2 y Na. Los espectros muestran un fuerte continuo, indicando un contenido significativo de polvo. Se detectó mayor intensidad del contínuo, en la dirección anti solar, lo cual es evidencia de la cola de polvo.
The Astrophysical Journal, 1999
DISCOVERY OF THE OPTICAL TRANSIENT OF GRB 990308 BRADLEY E. SCHAEFER,1,2 JA SNYDER,1 J. HERNANDEZ... more DISCOVERY OF THE OPTICAL TRANSIENT OF GRB 990308 BRADLEY E. SCHAEFER,1,2 JA SNYDER,1 J. HERNANDEZ,3,4 B. ROSCHERR,1 M. DENG,1 N. ELLMAN,1 C. BAILYN,2 A. RENGSTORF,5 D. SMITH,6 A. LEVINE,6 S. BARTHELMY,7 P. BUTTERwORTH,7 K. ...
The Astrophysical Journal, 2004
The Williams-MIT collaboration (www.stellaroccultations.info) predicted and observed a stellar oc... more The Williams-MIT collaboration (www.stellaroccultations.info) predicted and observed a stellar occultation of 2UCAC 26260847 (mag 14.35) by KBO 50000 Quaoar (mag 18.9) on 8/9 July 2013. Observations were attempted from a total of five sites in Chile, Venezuela, and Massachusetts. Only one site, Llano del Hato National Astronomical Observatory in Venezuela, had a positive detection of the occultation, giving us a single chord on Quaoar. All other sites were cloudy. The light curve from the 8/9 July 2013 event has been analyzed with the assumption that Quaoar is ellipsoidal or spherical, placing bounds on some of Quaoar’s properties: diameter (> 1138 ± 25 km), density (< 1.82 ± 0.28 g cm-3), and albedo (< 0.14 ± 0.10). An independent prediction of the occultation’s shadow path by Fraser, Gwyn, et al. (2013) suggests that the chord is near-equatorial, which means that our bounds on Quaoar’s properties are closer to estimates. We will compare our result with that of the 11 Febr...
The Astrophysical Journal, 2004
CES Medicina, 2010
Page 1. RU486 JUAN FELIPE FERNANDEZ G., ORLANDO NARANJO C. ,RICARDO NAVIA (II Semestre de Medicin... more Page 1. RU486 JUAN FELIPE FERNANDEZ G., ORLANDO NARANJO C. ,RICARDO NAVIA (II Semestre de Medicina) ... El sangrado puede ser bastante pesado, como un período pesado. Usted puede tener también calambres como dolores característico. ...
The Astronomical Journal, 2006
Monthly Notices of The Royal Astronomical Society, 1980
A theoretical model was constructed for the brightness of comet Encke as a function of heliocentr... more A theoretical model was constructed for the brightness of comet Encke as a function of heliocentric distance, R, using conservation of solar energy, and assuming that C2 molecules are evaporated at the same rate as water molecules. An equation relating the total number of C2 molecules in the coma, and the total visual magnitude, m(V), was used to produce a
It is shown that three supergiant stars have variable radial velocities
The Astrophysical Journal, 2001
Available from the Minor Planet Center.
Available from the Minor Planet Center.
Available from the Minor Planet Center.
QUEST1 constructed a 16-chip CCD camera to be used on the 1m Schmidt telescope at the Llano del H... more QUEST1 constructed a 16-chip CCD camera to be used on the 1m Schmidt telescope at the Llano del Hato National Astronomical Observatory in Venezuela. Normally operated in the drift-scan mode, an equatorial scan will expose any point on the sky for 143s and result in limiting magnitudes of B=18.5, V=19.2, and R=19.5 at S/N=10. These data were collected between 1999
Revista Mexicana De Astronomia Y Astrofisica - REV MEX ASTRON ASTROFIS, 1987
Se reportan observaciones espectroscópicas del cometa Halley. Los espectros fueron tomados usando... more Se reportan observaciones espectroscópicas del cometa Halley. Los espectros fueron tomados usando el espectrógrafo del telescopio reflector de 1 metro del Observatorio Nacional de Venezuela. Se utilizó óptica azul, con una red de difracción de 600 lineas/min, obteniéndose una dispersión de 74.2 A/mm y una resolución de 2.5 A, en el rango espectral de 3500 a 6500 A. Seis placas fueron tomadas con emulsión IIa-O y dos con IIa-D. Los tiempos de exposición fueron entre 10 y 150 minutos. El cometa se encontraba entre 0.70 y 1.04 UA del Sol, y entre 1.28 y 0.73 UA de la Tierra. Las emisiones más prominentes en el espectro, son las del CN, C2, y C3. Otras emisiones detectadas corresponden a CH, NH2 y Na. Los espectros muestran un fuerte continuo, indicando un contenido significativo de polvo. Se detectó mayor intensidad del contínuo, en la dirección anti solar, lo cual es evidencia de la cola de polvo.
The Astrophysical Journal, 1999
DISCOVERY OF THE OPTICAL TRANSIENT OF GRB 990308 BRADLEY E. SCHAEFER,1,2 JA SNYDER,1 J. HERNANDEZ... more DISCOVERY OF THE OPTICAL TRANSIENT OF GRB 990308 BRADLEY E. SCHAEFER,1,2 JA SNYDER,1 J. HERNANDEZ,3,4 B. ROSCHERR,1 M. DENG,1 N. ELLMAN,1 C. BAILYN,2 A. RENGSTORF,5 D. SMITH,6 A. LEVINE,6 S. BARTHELMY,7 P. BUTTERwORTH,7 K. ...
The Astrophysical Journal, 2004