00057+4549 STT 547AF

Coord 2000	00057+4549		Discov num	STT 547		Comp	AF		Coord arcsec 2000	00 05 41.03 +45 48 43.3
Date first	1897		Date last	2018		Obs	41
Pa first	254		Pa last	254		P.A. Now (θ)	254°
Sep first	327.6		Sep last	330.0		Sep. Now (ρ)	330"
Mag pri	8.98		Mag sec	10.19		delta mag (ΔM)	1.21		Spectral class	K6V+M2e (yellow-orange/red)
Pri motion ra	+879		Sec motion ra	+870
Pri motion dec	-154		Sec motion dec	-151
Notes	N O W V (See Notes, Orbital solution, , Proper motion indicates physical)

rPM=0.011 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		36046	00 05 41 +45 48 43	STT 547 AB	2020	428	191	5.9	8.98	9.15	0.17	Y
Show		36046	00 05 41 +45 48 43	STT 547 AC	2018	29	263	117.0	8.98	13.71	4.73
Show		36046	00 05 41 +45 48 43	STT 547 AD	2018	37	230	108.4	8.98	12.51	3.53
Show		36046	00 05 41 +45 48 43	STT 547 AE	2018	46	346	58.7	8.98	11.75	2.77
Show		36046	00 05 41 +45 48 43	STT 547 AF	2018	41	254	330.0	8.98	10.19	1.21	Y	<===
Show		36046	00 05 41 +45 48 43	POP 217 AP	2018	37	314	17.4	8.98	13.40	4.42
Show		36046	00 05 41 +45 48 43	POP 217 AQ	2006	7	130	20.0	8.98	16.00	7.02
Show		36046	00 05 41 +45 48 43	POP 217 AX	2006	2	222	12.0	8.98
Show		36046	00 05 41 +45 48 43	POP 217 AY	2018	9	78	188.8	8.98	14.80	5.82
Show		36048	00 05 41 +45 48 37	STT 547 BC	2016	8	266	115.7	9.15	13.71	4.56
Show		36048	00 05 41 +45 48 37	STT 547 BD	2016	10	233	106.4	9.15	12.51	3.36
Show		36048	00 05 41 +45 48 37	STT 547 BE	2016	16	346	64.4	9.15	11.75	2.60
Show		36048	00 05 41 +45 48 37	STT 547 BF	2018	35	251	324.2	9.15	10.19	1.04
Show		36048	00 05 41 +45 48 37	STT 547 BP	2016	9	331	20.3	9.15	13.10	3.95
Show		36046	00 05 31 +45 48 26	PAL 2 Ca,Cb	2016	20	91	6.1	13.71	14.90	1.19
Show		36048	00 06 00 +45 49 20	POP 217 YG	2016	11	188	9.7	14.80	15.80	1.00

12-fold system
11 visible stars in this system

Precise pa	253.9		Precise sep	329.97		Constellation	Hydra		SAO	36046
HIP	473		Tycho2	3246-00874-1		HD	38		ADS	48
GL	Gl 4A		BD	BD+45 4408		Distance	11.31		Distance ly	36.89
last precise pa	253.9		last precise sep	329.97

Period (P)	830.37c		Periastron (T)	26357y		Semi-major axis (a)	205.1a
Eccentricity (e)	0.81		Inclination (i)	75.9°		Longitude of periastron (ω)	345.6°
Node (Ω)	74.3°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox			Last observation

label rho theta 2000 326.909 254.3 2001 326.903 254.3 2002 326.898 254.3 2003 326.893 254.3 2004 326.887 254.3 2005 326.882 254.3 2006 326.877 254.3 2007 326.871 254.3 2008 326.866 254.3 2009 326.860 254.3 2010 326.855 254.3 2011 326.850 254.3 2012 326.844 254.3 2013 326.839 254.3 2014 326.834 254.3 2015 326.828 254.3 2016 326.823 254.3 2017 326.817 254.3 2018 326.812 254.3 2019 326.807 254.3 2020 326.801 254.3 2021 326.796 254.3 2022 326.790 254.3 2023 326.785 254.3 2024 326.780 254.3 2025 326.774 254.3 2026 326.769 254.3 2027 326.764 254.3 2028 326.758 254.3 2029 326.753 254.3 2030 326.747 254.3		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00057+4549	STT 547	AF	2007	36	254	327.9	9.59	10.19	K6	N DV	000541.03+454843.3
00057+4549	STT 547	AF	2015	38	254	328.4	8.98	10.19	K6V+M2e	NO V	000541.03+454843.3
00057+4549	STT 547	AF	2018	39	254	330.0	8.98	10.19	K6V+M2e	NO V	000541.03+454843.3

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