Star • GDR1 5209019521517870080

Cluster
eta Cha
Proposed Clusters
Alternate Names
EI Cha
[MHL2005] 4
2MASS J08422372-7904030
GDR1 5209019521517870080
2MASS 08422372-7904030
GDR2 5209019521517870080
[GRS2008] 04
eta Cha 4
RECX 4
GSC 9403-1083
WISEA J084223.64-790402.7
#RECX 4
V* EI Cha
SIP Output
Aladin
08 42 23.597 -79 04 2.59
FoV: 3'
+–
×
×
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Fiducial Data

Parameter
Value
Error
Unit
Reference
cluster_name
eta Cha
 
[char]
messina2011
ra
08 42 23.597
 
h m s
gaiacollaboration2016
dec
-79 04 02.5858
 
d m s
gaiacollaboration2016
ra_deg
130.59832099
 
deg
gaiacollaboration2016
dec_deg
-79.06738495
 
deg
gaiacollaboration2016
pm_ra
-30.86
0.042
mas/yr
gaiacollaboration2018
pm_dec
25.877
0.055
mas/yr
gaiacollaboration2018
rv
16.01
1.21
km/s
gaiacollaboration2018
plx
10.0477
0.0235
mas
gaiacollaboration2018
st_dist
99.5253
0.2328
pc
gaiacollaboration2018
spt
K7
 
[char]
messina2011
spt_num
57.0
 
[decimal allowed]
messina2011
spt_lit
K7
 
[char]
messina2011
H_alpha
-3.12
 
0.1nm
riviere-marichalar2015
H_alpha_tenp
229.0
 
km/s
riviere-marichalar2015
LiI_6708
0.587
0.021
0.1nm
mentuch2008
vsini
5.96
1.0
km/s
scholz2007
rot_period
7.1
0.4
days
messina2011
Av
0.617
0.3
mag
YSOPY
Teff
3970.0
93.6
K
YSOPY

Non Fiducial Data

Membership
cluster_name ([char])
Value Error Ref.
unknown gaiacollaboration2016
eta Cha scholz2007
eta Cha mentuch2008
eta Cha tanner2007
eta Cha jayawardhana2006
mem_num ([integer])
Value Error Ref.
0 gaiacollaboration2016
mem_lit_name ([char])
Value Error Ref.
eta Cha tanner2007
Motion
rv (km/s)
Value Error Ref.
17.8 0.5 riviere-marichalar2015
ObsProp
spt ([char])
Value Error Ref.
M1.75 luhman2004
M1 lawson2001
M0 skiffBMK
K7 mamajek1999
spt_num ([decimal allowed])
Value Error Ref.
61.75 luhman2004
61.0 lawson2001
60.0 skiffBMK
57.0 mamajek1999
spt_lit ([char])
Value Error Ref.
M1.75 luhman2004
M1 lawson2001
M0IVe skiffBMK
K7 mamajek1999
H_alpha (0.1nm)
Value Error Ref.
-3.4 0.61 scholz2007
-3.4 0.63 jayawardhana2006
-2.3 lawson2004
-2.7 mamajek1999
H_alpha_tenp (km/s)
Value Error Ref.
147.0 14.0 jayawardhana2006
105.0 lawson2004
LiI_6708 (0.1nm)
Value Error Ref.
0.6 mamajek1999
vsini (km/s)
Value Error Ref.
6.0 jayawardhana2006
rot_period (days)
Value Error Ref.
7.04 lawson2001
Derived Stellar Properties
Teff (K)
Value Error Ref.
3600.0 riviere-marichalar2015
3822.0 11.0 mentuch2008
3596.0 luhman2004
3741.0 lawson2001
4023.0 398.5 gaiacollaboration2018
log_Teff (log K)
Value Error Ref.
3.56 riviere-marichalar2015
3.58 0.01 mentuch2008
3.56 luhman2004
3.57 lawson2001
L_star (Lsun)
Value Error Ref.
0.23 0.13 riviere-marichalar2015
0.24 luhman2004
0.214 lawson2001
0.206 0.001 gaiacollaboration2018
log_L_star (log Lsun)
Value Error Ref.
-0.6383 0.3608 riviere-marichalar2015
-0.6198 luhman2004
-0.66959 lawson2001
R_star (Rsun)
Value Error Ref.
1.1 lawson2001
0.93 0.185 gaiacollaboration2018
M_star (Msun)
Value Error Ref.
0.52 lawson2001
0.8 mamajek1999
log_M_star (log Msun)
Value Error Ref.
-0.284 lawson2001
-0.097 mamajek1999
age_star (Myr)
Value Error Ref.
4.0 lawson2001
16.0 mamajek1999
log_age_star (log yr)
Value Error Ref.
6.6 lawson2001
7.2 mamajek1999
X-ray
xray_flag ([boolean])
Value Error Ref.
True mamajek1999
Lx (erg/s)
Value Error Ref.
1.2589254117899999e+30 mamajek1999
log_Lx (log erg/s)
Value Error Ref.
30.1 mamajek1999
Optical Photometry
V (mag)
Value Error Ref.
12.763 0.028 henden2016
gaia_g (mag)
Value Error Ref.
11.764 gaiacollaboration2016
Mid-Infrared Photometry
L (mag)
Value Error Ref.
8.32 lyo2003
S_3p6 (mag)
Value Error Ref.
8.45 0.02 megeath2005
S_4p5 (mag)
Value Error Ref.
8.45 0.02 megeath2005
S_5p8 (mag)
Value Error Ref.
8.37 0.01 megeath2005
S_8 (mag)
Value Error Ref.
8.32 0.02 megeath2005
Coordinates
ra (h m s)
Value Error Ref.
08 42 23.597 gaiacollaboration2016
08 42 23.725 cutri2003
08 42 23.641 wright2010
08 42 23.765 riviere-marichalar2015
08 42 23.765 messina2011
08 42 23.765 lopez-santiago2010
08 42 23.765 sicilia-aguilar2009
08 42 23.765 scholz2007
08 42 23.765 mentuch2008
08 42 23.765 bouwman2006
08 42 23.765 gautier2008
08 42 23.765 tanner2007
08 42 23.765 jayawardhana2006
08 42 23.765 haisch2005
08 42 23.765 megeath2005
08 42 23.73 luhman2004
08 42 23.765 lawson2004
08 42 23.765 lyo2003
08 42 23.765 lawson2001
08 42 23.770 skiffBMK
08 42 23.557 henden2016
08 42 23.7 mamajek1999
08 42 23.592 gaiacollaboration2018
dec (d m s)
Value Error Ref.
-79 04 02.59 gaiacollaboration2016
-79 04 03.02 cutri2003
-79 04 02.71 wright2010
-79 04 03.03 riviere-marichalar2015
-79 04 03.03 messina2011
-79 04 03.03 lopez-santiago2010
-79 04 03.03 sicilia-aguilar2009
-79 04 03.03 scholz2007
-79 04 03.03 mentuch2008
-79 04 03.03 bouwman2006
-79 04 03.03 gautier2008
-79 04 03.03 tanner2007
-79 04 03.03 jayawardhana2006
-79 04 03.03 haisch2005
-79 04 03.03 megeath2005
-79 04 03.0 luhman2004
-79 04 03.03 lawson2004
-79 04 03.03 lyo2003
-79 04 03.03 lawson2001
-79 04 03.00 skiffBMK
-79 04 02.86 henden2016
-79 04 03.6 mamajek1999
-79 04 02.57 gaiacollaboration2018
ra_deg (deg)
Value Error Ref.
130.59832099 0.303 gaiacollaboration2016
130.598854 60.0 cutri2003
130.5985029 43.7674 wright2010
130.59902083 riviere-marichalar2015
130.59902083 messina2011
130.59902083 lopez-santiago2010
130.59902083 sicilia-aguilar2009
130.59902083 scholz2007
130.59902083 mentuch2008
130.59902083 bouwman2006
130.59902083 gautier2008
130.59902083 tanner2007
130.59902083 jayawardhana2006
130.59902083 haisch2005
130.59902083 megeath2005
130.598875 luhman2004
130.59902083 lawson2004
130.59902083 lyo2003
130.59902083 lawson2001
130.59904 skiffBMK
130.598154 211.0 henden2016
130.59875 mamajek1999
130.59829837 0.0212 gaiacollaboration2018
dec_deg (deg)
Value Error Ref.
-79.06738495 0.375 gaiacollaboration2016
-79.067505 130.0 cutri2003
-79.0674182 43.4009 wright2010
-79.06750833 riviere-marichalar2015
-79.06750833 messina2011
-79.06750833 lopez-santiago2010
-79.06750833 sicilia-aguilar2009
-79.06750833 scholz2007
-79.06750833 mentuch2008
-79.06750833 bouwman2006
-79.06750833 gautier2008
-79.06750833 tanner2007
-79.06750833 jayawardhana2006
-79.06750833 haisch2005
-79.06750833 megeath2005
-79.0675 luhman2004
-79.06750833 lawson2004
-79.06750833 lyo2003
-79.06750833 lawson2001
-79.0675 skiffBMK
-79.067462 146.0 henden2016
-79.06766667 mamajek1999
-79.0673815 0.0293 gaiacollaboration2018

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