HD 87822

{{Short description|Binary star system in the constellation Leo Minor}}

{{Starbox begin

| name=HD 87822

}}

{{Starbox observe 2s

| epoch=J2000

| constell=Leo Minor

| component1 = AB

| ra1={{RA|10|08|15.88717}}

| dec1={{DEC|+31|36|14.5875}}

| appmag_v1=6.240 {{nowrap|(6.90 + 7.20)}}

| component2 = C

| ra2={{RA|10|08|16.16565}}

| dec2={{DEC|+31|35|47.1421}}

| appmag_v2=13.8

}}

{{Starbox character

| component1=AB

| class=F4V

| b-v=+0.445

| u-b=+0.01

| variable=

| component2=C

| class2=dMs1.5

| b-v2=

| u-b2=

| variable2=

}}

{{Starbox astrometry

| component1=AB

| radial_v=−8.0

| prop_mo_ra=−80.47

| prop_mo_dec=−92.07

| parallax=16.33

| p_error=0.42

| parallax_footnote=

| absmag_v=2.23

| component2=C

| radial_v2=−5.77

| prop_mo_ra2=−80.484

| prop_mo_dec2=−87.851

| parallax2=16.0212

| p_error2=0.0186

| parallax_footnote2=

| absmag_v2=

}}

{{Starbox orbit

| primary=A

| name=B

| reference =

| period = {{val|17.765|0.036}}

| axis = {{val|0.1560|0.0005}}

| eccentricity = {{val|0.3960|0.0038}}

| inclination = {{val|84.59|0.20}}

| node = {{val|349.57|0.15}}

| periastron = B {{val|1989.133|0.042|fmt=none}}

| periarg = {{val|7.73|0.95}}

}}

{{Starbox detail

| component1=A

| mass=1.45

| radius=

| luminosity=

| temperature=6,533

| metal_fe=0.10

| gravity=4.18

| rotational_velocity=8

| age_gyr=1.6

| component2=B

| mass2=1.38

}}

{{Starbox detail|no_heading=y

| component1=C

| mass=0.53

| temperature=3,610

| luminosity=0.04

| radius=0.53

| gravity=4.71

| metal_fe=−0.31

}}

{{Starbox catalog

| names=BD+32°1982, HD 87822, HIP 49658, HR 3979, SAO 61882.

}}

{{Starbox reference

| Simbad=HD+87822

}}

HD 87822 is a triple star in the northern constellation of Leo Minor. The inner pair orbit each other with a period of about 18 years.

References

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