1994PASP..106..542H

Query : 1994PASP..106..542H

1994PASP..106..542H - Publ. Astron. Soc. Pac., 106, 542-547 (1994/May-0)

The effect of double stars on the guidance system of the Hubble Space Telescope.

HERSHEY J.L. and BELY P.-Y.

Abstract (from CDS):

The interferometric system used for guidance of HST is sensitive to close binaries. Before the launch of HST it was believed that up to 25% of all guide star pairs would lead to guidance failure due to duplicity. After more than 3 years of operation the actual failure rate ascribable to duplicity is estimated to be just below 1%. A computer simulator has been developed to understand the causes of the discrepancy. The simulation indicates a failure rate of under 2% per guide-star pair, in much closer agreement with the observed performance of the guiding system. The failure criterion originally used, was based on the manufacturer's expectations, and was too conservative. The proportion of binary guide stars in the critical separation range had also been somewhat overestimated.

Abstract Copyright: ∼

Journal keyword(s):

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	BD+84 12	*	00 42 43.4115091200	+85 14 14.133990876	10.061	10.05	9.55			F5	30	0

Query : 1994PASP..106..542H

Basic data :

BD+84 12 -- Star

* (2012ApJ,BD,...), X (2XMM,XMMU,...), NIR (2MASS)

00 42 43.4115091200 +85 14 14.133990876 (Optical) [ 0.0107 0.0098 90 ] A 2020yCat.1350....0G

00 37 51.6253492599 +84 57 47.644947921 [ 0.0107 0.0098 90 ]

122.7363647448113 +22.3688211550509 [ 0.0107 0.0098 90 ]

43.850 -0.063 [0.013 0.012 90] A 2020yCat.1350....0G

V(km/s) 0.56 [0.89] / z(spectroscopic) 0.000002 [0.000003] / cz 0.56 [0.89] (Opt) A 2018yCat.1345....0G

6.8449 [0.0109] A 2020yCat.1350....0G

F5 D ~

U 10.061 [0.0060] D 2004PASP..116.1012S

B 10.05 [~] E ~

V 9.55 [~] E ~

G 9.470417 [0.002763] C 2020yCat.1350....0G

J 8.611 [0.026] C 2003yCat.2246....0C

H 8.457 [0.046] C 2003yCat.2246....0C

K 8.390 [0.023] C 2003yCat.2246....0C

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`BD+84 12`	`HIC 3354`	`TIC 461599251`	`[G2005] 2`
`AG+84 17`	`HIP 3354`	`TYC 4619-1496-1`	`Gaia DR2 573942050339484288`
*`Cl NGC 188 UMK 69`**	`2MASS J00424339+8514139`	`UBV M 30005`	`Gaia DR3 573942050339484288`
*`Cl NGC 188 SMV 5757`**	`NGC 188 2029`	`2XMM J004243.9+851414`	`Gaia DR1 573942046042147712`
`GEN# +2.01882029`	`PPM 128`	`XMMU J004244.3+851415`
`GSC 04619-01496`	`SAO 111`	`[BVM98] NGC 188 30`

References (30 between 1850 and 2026) (Total 30)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : BD+84 12

Link by name to the catalogue in VizieR :

`BD+84 12`	`AG+84 17`	`GSC 04619-01496`	`HIC 3354`	`HIP 3354`
`2MASS J00424339+8514139`	`PPM 128`	`SAO 111`	`TYC 4619-1496-1`	`Gaia DR2 573942050339484288`
`Gaia DR3 573942050339484288`	`Gaia DR1 573942046042147712`

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