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SSSPM J1549-3544 is a star in the constellation Lupus with high proper motion. It was initially found to have high proper motion in a 2003 survey of images taken by the optical SuperCOSMOS Sky Surveys and by the near-infrared sky surveys 2MASS and DENIS. It was then thought to be a cool white dwarf close to the Sun. However, more detailed spectroscopic observations in 2005 appear to show that it is not a white dwarf, but a high-velocity halo metal-poor subdwarf.

References

1. ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
2. ^ Farihi, J.; Wood, P. R.; Stalder, B. (2005). "SSSPM J1549-3544 is Not a White Dwarf". The Astrophysical Journal. 627 (1): L41–L43. arXiv:astro-ph/0505525. Bibcode:2005ApJ...627L..41F. doi:10.1086/432158. S2CID 10645235.
3. Scholz, R. -D; Lehmann, I.; Matute, I.; Zinnecker, H. (2004). "The nearest cool white dwarf (D ∼4 pc), the coolest M-type subdwarf (SdM9.5), and other high proper motion discoveries". Astronomy and Astrophysics. 425: 519–527. arXiv:astro-ph/0406457. Bibcode:2004A&A...425..519S. doi:10.1051/0004-6361:20041059. S2CID 9352481.

v t e Constellation of Lupus
List of stars in Lupus Lupus in Chinese astronomy
Stars	Bayer α β γ δ ε ζ η θ ι κ κ λ μ ν ν ξ ξ ο π ρ σ τ τ υ φ φ χ ψ ψ ω Flamsteed 1 (i) 2 (f) Variable RU EX GG GQ HR II IL IM KT (d) V407 HR 5364 5401 5651 (e) 5724 (k) 5825 (g) 5943 5967 HD 134004 142527 Other Gliese 588 HIP 70849 Lupus-TR-3 SAO 206462 SSSPM J1549-3544 WASP-132
Exoplanets GQ Lupi b HIP 70849 b Lupus-TR-3b WASP-178b
Star clusters NGC 5749 NGC 5822 NGC 5824 NGC 5927 NGC 5986
Nebulae IC 4406 NGC 5882
Galaxies NGC 5643
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