<system>
	<name>HD 11964</name>
	<rightascension>01 57 09.60763</rightascension>
	<declination>-10 14 32.7336</declination>
	<distance errorminus="0.65" errorplus="0.65">32.85</distance>
	<binary>
		<name>HD 11964</name>
		<name>Gliese 81.1</name>
		<name>GJ 81.1</name>
		<name>GJ 9063</name>
		<name>BD-10 403</name>
		<name>WDS J01572-1015</name>
		<separation unit="arcsec">29.7</separation>
		<separation unit="AU">976</separation>
		<positionangle>133</positionangle>
		<star>
			<name>HD 11964 A</name>
			<name>Gliese 81.1 A</name>
			<name>GJ 81.1 A</name>
			<name>HIP 904</name>
			<name>TYC 5278-2314-1</name>
			<name>GJ 9063 A</name>
			<name>BD-10 403 A</name>
			<name>WDS J01572-1015 A</name>
			<mass errorminus="0.012" errorplus="0.028">1.080</mass>
			<radius>2.18</radius>
			<magV>6.42</magV>
			<magB>7.25</magB>
			<magK errorminus="0.02" errorplus="0.02">4.49</magK>
			<age>13.1</age>
			<metallicity>0.17</metallicity>
			<spectraltype>G5</spectraltype>
			<planet>
				<name>HD 11964 A b</name>
				<name>Gliese 81.1 A b</name>
				<name>GJ 81.1 A b</name>
				<name>HD 11964 b</name>
				<list>Confirmed planets</list>
				<list>Planets in binary systems, S-type</list>
				<mass errorminus="0.029" errorplus="0.029" type="msini">0.583</mass>
				<period errorminus="25" errorplus="26">1956</period>
				<semimajoraxis>3.14</semimajoraxis>
				<eccentricity errorminus="0.037" errorplus="0.051">0.073</eccentricity>
				<periastron errorminus="64" errorplus="125">158</periastron>
				<periastrontime errorminus="341" errorplus="682">2454189</periastrontime>
				<description>The planet hosting star HD 11964 A is a yellow subgiant in the constellation Cetus. It is a member of a wide binary.</description>
				<discoverymethod>RV</discoverymethod>
				<lastupdate>17/12/10</lastupdate>
				<discoveryyear>2005</discoveryyear>
			</planet>
			<planet>
				<name>HD 11964 A c</name>
				<name>Gliese 81.1 A c</name>
				<name>GJ 81.1 A c</name>
				<name>HD 11964 c</name>
				<list>Confirmed planets</list>
				<list>Planets in binary systems, S-type</list>
				<mass errorminus="0.0097" errorplus="0.0097" type="msini">0.0788</mass>
				<period errorminus="0.041" errorplus="0.041">37.910</period>
				<semimajoraxis errorminus="0.013" errorplus="0.013">0.229</semimajoraxis>
				<eccentricity errorminus="0.17" errorplus="0.17">0.30</eccentricity>
				<periastron>102</periastron>
				<periastrontime errorminus="380" errorplus="380">2454370</periastrontime>
				<description>The planet hosting star HD 11964 A is a yellow subgiant in the constellation Cetus. It is a member of a wide binary.</description>
				<discoverymethod>RV</discoverymethod>
				<lastupdate>17/12/10</lastupdate>
				<discoveryyear>2005</discoveryyear>
			</planet>
		</star>
		<star>
			<name>HD 11964 B</name>
			<name>Gliese 81.1 B</name>
			<name>GJ 81.1 B</name>
			<name>BD-10 403 B</name>
			<name>GJ 9063 B</name>
			<name>2MASS J01571110-1014528</name>
			<name>WDS J01572-1015 B</name>
			<magB>12.59</magB>
			<magV errorminus="0.03" errorplus="0.03">11.112</magV>
			<magR errorminus="0.05" errorplus="0.05">10.758</magR>
			<magI>9.41</magI>
			<magJ errorminus="0.023" errorplus="0.023">8.413</magJ>
			<magH errorminus="0.021" errorplus="0.021">7.763</magH>
			<magK errorminus="0.027" errorplus="0.027">7.597</magK>
			<spectraltype>M0.0Ve</spectraltype>
			<mass>0.67</mass>
		</star>
	</binary>
	<constellation>Cetus</constellation>
</system>
