<system>
	<name>tau Boo</name>
	<rightascension>13 47 15.74340</rightascension>
	<declination>+17 27 24.8552</declination>
	<distance errorminus="0.05" errorplus="0.05">15.62</distance>
	<binary>
		<name>tau Boo</name>
		<name>WDS J13473+1727</name>
		<name>HIP 67275</name>
		<semimajoraxis errorminus="110" errorplus="110">120</semimajoraxis>
		<eccentricity errorminus="0.074" errorplus="0.074">0.836</eccentricity>
		<ascendingnode errorminus="50.3" errorplus="50.3">171.9</ascendingnode>
		<inclination errorminus="39.7" errorplus="39.7">37.0</inclination>
		<period errorminus="482500" errorplus="482500">352100</period>
		<periastrontime errorminus="1800" errorplus="1800">2462500</periastrontime>
		<periastron errorminus="28.6" errorplus="28.6">334.2</periastron>
		<star>
			<name>tau Boo A</name>
			<name>Tau Boötis A</name>
			<name>Tau Bootis A</name>
			<name>HD 120136 A</name>
			<name>GJ 527 A</name>
			<name>Gliese 527 A</name>
			<name>HIP 67275 A</name>
			<name>WDS J13473+1727 A</name>
			<name>HR 5185</name>
			<mass errorminus="0.25" errorplus="0.25">1.39</mass>
			<radius errorminus="0.08" errorplus="0.08">1.42</radius>
			<magV>4.5</magV>
			<magB>4.98</magB>
			<magR>4.2</magR>
			<magI>4.0</magI>
			<magJ>3.62</magJ>
			<magH>3.55</magH>
			<magK errorminus="0.05" errorplus="0.05">3.36</magK>
			<metallicity errorminus="0.03" errorplus="0.03">0.26</metallicity>
			<temperature errorminus="45" errorplus="45">6399</temperature>
			<age errorminus="0.5" errorplus="0.5">0.9</age>
			<spectraltype>F7 V</spectraltype>
			<planet>
				<name>tau Boo A b</name>
				<name>Tau Boötis A b</name>
				<name>Tau Bootis A b</name>
				<name>HD 120136 A b</name>
				<name>GJ 527 A b</name>
				<name>Gliese 527 A b</name>
				<name>HR 5185 b</name>
				<name>tau Boo b</name>
				<list>Confirmed planets</list>
				<mass errorminus="0.17" errorplus="0.17">6.13</mass>
				<period errorminus="0.0000069" errorplus="0.0000069">3.3124568</period>
				<semimajoraxis errorminus="0.003" errorplus="0.003">0.049</semimajoraxis>
				<eccentricity errorminus="0.006" errorplus="0.006">0.011</eccentricity>
				<inclination errorminus="1.5" errorplus="1.5">44.5</inclination>
				<periastron errorminus="32.2" errorplus="32.2">113.4</periastron>
				<periastrontime errorminus="0.30" errorplus="0.30" unit="BJD">2456400.94</periastrontime>
				<description>The planet Tau Boötis b was one of the first exoplanets to be discovered back in 1996. In 2012, astronomers have detected the faint glow that is emitted from the planet, reliably probing the structure of the atmosphere of Tau Bootis b and deducing its mass accurately for the first time.</description>
				<temperature>2000</temperature>
				<discoverymethod>RV</discoverymethod>
				<lastupdate>14/03/04</lastupdate>
				<discoveryyear>1996</discoveryyear>
				<image>tauboo</image>
				<imagedescription>This artist's impression shows the exoplanet Tau Bootis b. 

		Credit: ESO/L. Calcada</imagedescription>
				<list>Planets in binary systems, S-type</list>
			</planet>
		</star>
		<star>
			<name>tau Boo B</name>
			<name>Tau Boötis B</name>
			<name>Tau Bootis B</name>
			<name>HD 120136 B</name>
			<name>GJ 527 B</name>
			<name>Gliese 527 B</name>
			<name>HIP 67275 B</name>
			<name>WDS J13473+1727 B</name>
			<mass>0.40</mass>
			<spectraltype>M2</spectraltype>
			<magV>11.1</magV>
		</star>
	</binary>
</system>
