Timur

Тот же Юрий Соломонов сообщает о том, что 4 августа в 4 утра он наблюдал на расстоянии в 1 - 1.5 диска от Венеры звездочку 7-8 звездной величины, которая выглядела подобием спутника этой планеты. Он просит посмотреть, что это было по каталогу SAO или Гипархус.

Если посмотреть в SkyMap, получается, что около 2 ч. Московского летнего времени Венера проходила примерно в 0.5' от переменной звезды TV Gem.

Summary

Visual magnitude: 6.81

Position information for 04 Aug 2001 2:00:00 AM
(Julian day number 2452125.41667)

Apparent RA (epoch of date): 06h 11m 54.90s
Apparent Dec (epoch of date): +21њ 52' 04.3"
Constellation: Gemini

Altitude: -2њ 42' 55"
Azimuth: 42њ 55' 42"

Rise: 2h 21m 29s
Transit: 10h 49m 58s
Set: 19h 18m 28s

Names and Catalog Numbers

Tycho catalog number: TYC 1326-1733-1
PPM number: PPM 95588
SAO number: SAO 78092
Henry Draper number: HD 42475
DM number: BD +21 1146

Star Atlas Chart Numbers

Herald-Bobroff Astroatlas, Chart C-34
Millennium Star Atlas, Charts 155-156 (Vol I)
Sky Atlas 2000.0, Chart 5
Uranometria 2000 Chart 137, Vol 1

Tycho Catalog Data

Tycho Catalogue (ESA SP-1200, 1997).

Tycho Identifier/Proximity Flag

Catalog number: TYC 1326-1733-1

Proximity flag: None

Descriptor

V magnitude: 6.81
Source of V magnitude: Johnson UBV photometric system.

Astrometric Data

Equatorial coordinates (epoch J2000.0, ICRS)

RA: 06h 11m 51.4163s
Dec: +21њ 52' 05.663"

Standard errors of the equatorial coordinates (epoch J1991.25)

RA: 0.0068 arcsec
Dec: 0.0042 arcsec

Astrometric reference flag: This is a recommended astrometric reference star, having good Tycho astrometric quality, and not recognised as double.

Trigonometric parallax: -0.01280 arcsec
Standard error of the parallax: 0.00740 arcsec

Proper motion components (epoch J1991.25, ICRS)

RA: +0.00550 arcsec/yr
Dec: +0.00010 arcsec/yr

Standard errors of the proper motion components

RA: 0.0056 arcsec
Dec: 0.0044 arcsec

Number of accepted data points: 106
Goodness-of-fit parameter, F2: 1.49

Hipparcos catalog number: 29416

Astrometric quality flag: 2 (very high).
Signal-to-noise ratio of the star image, Fs: 10.7

Source of astrometric data: Standard data processing.

Photometric Data

Mean Bt magnitude: 9.600
Standard error: 0.022

Mean Vt magnitude: 7.056
Standard error: 0.007

Source of photometric data: The Bt,Vt data are de-censored mean values derived from the de-censoring analysis from the (normal) photometric processing for faint stars.

Johnson B-V colour index: 2.131
Standard error: 0.020

Number of transits used in mean photometry: 84
Vt scatter, s: 0.163 mag
Vt magnitude at maximum luminosity: 6.95
Vt magnitude at minimum luminosity: 7.24

Previously known or suspected variability: The star is listed in the "General Catalog of Variable Stars, 4th edition" (P.N.Kholopov et al., Publ. Office 'Nauka', Moscow, 1985-88).

Variability of the Tycho measurements: Apparent variability in the Tycho data; this may be due to duplicity, and this flag is only set if an indication of duplicity was also found.

Unresolved duplicity status: Weak indication of duplicity, combined with indication of variability.

Cross-identification and Notes

PPM identifier: PPM 95588
HD identifier: HD 42475
DM identifier: BD +21 1146

[ 27-08-2001: Сообщение редактировал: Pietro ]

Timur

Класс, видимо это она и была! Спасибо за оперативность!