Table 2: Orbital elements of HD 153720 .
Element Units Heard & Hurkens (1975) First solution Second solution

Value Error Value Error Value Error

P days 11.01147 0.00007 11.01160 0.00009 11.01161 0.00006

$\gamma$ ${{\rm km~s^{-1}}}$ -13.6 0.1 -13.0 0.2 -13.5 0.1

K₁ ${{\rm km~s^{-1}}}$ 72.5 0.2 71.5 0.5 72.3 0.3

K₂ ${{\rm km~s^{-1}}}$ 73.2 0.2 74.1 0.5 73.3 0.3

e 0.389 0.002 0.390 0.004 0.389 0.003

$\omega$ degrees 306.3 0.3 306.3 0.7 306.3 0.5

T₀ J.D. 2 441 018.702 0.010 2 441 018.694 0.022 2 441 018.694 0.014

$M_A~\sin^3i$ $M_\odot$ 1.38 0.01 1.40 0.02 1.38 0.01

$M_B~\sin^3i$ $M_\odot$ 1.37 0.01 1.35 0.02 1.37 0.01

M_A/M_B 1.01 1.04 1.01

**Table 2:** Orbital elements of HD 153720 .
Element	Units	Heard & Hurkens (1975)		First solution		Second solution
		Value	Error		Value	Error	Value	Error
P	days	11.01147	0.00007		11.01160	0.00009	11.01161	0.00006
$\gamma$	${{\rm km~s^{-1}}}$	-13.6	0.1		-13.0	0.2	-13.5	0.1
K₁	${{\rm km~s^{-1}}}$	72.5	0.2		71.5	0.5	72.3	0.3
K₂	${{\rm km~s^{-1}}}$	73.2	0.2		74.1	0.5	73.3	0.3
e		0.389	0.002		0.390	0.004	0.389	0.003
$\omega$	degrees	306.3	0.3		306.3	0.7	306.3	0.5
T₀	J.D.	2 441 018.702	0.010		2 441 018.694	0.022	2 441 018.694	0.014
$M_A~\sin^3i$	$M_\odot$	1.38	0.01		1.40	0.02	1.38	0.01
$M_B~\sin^3i$	$M_\odot$	1.37	0.01		1.35	0.02	1.37	0.01
M_A/M_B		1.01			1.04		1.01

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