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Trigonometric parallax astrometry and BVI photometry are presented for twolate-type subdwarf candidates, LSR1425+71 (sdM8.0) and LSR1610-00 (sd?M6pec).For the former we measure an absolute parallax of 13.37+/-0.51 mas yieldingMv=15.25+/-0.09. The astrometry for LSR1610-00 shows that this object is anastrometric binary with a period of 1.66+/-0.01 yr. The photocentric orbit isderived from the data; it has a moderate eccentricity (e ~ 0.44+/-0.02) and asemi-major axis of 0.28+/-0.01 AU based on our measured absolute parallax of31.02+/-0.26 mas. Our radial velocity measure of -108.1+/-1.6 km/s forLSR1610-00 at epoch 2006.179, when coupled with the observation of -95+/-1 km/sat epoch 2005.167 by Reiners & Basri, indicates a systemic radial velocity of-101+/-1 km/s for the LSR1610-00AB pair. The galactic velocity components forLSR1425+71 and LSR1610-00AB -- (U,V,W)=(84+/-6, -202+/-13, 66+/-14) km/s and(U,V,W)=(36+/-2, -232+/-2, -61+/-2) km/s, respectively. For both stars, thevelocities are characteristic of halo population kinematics. However, modelingshows that both stars have orbits around the galaxy with high eccentricity thatpass remarkably close to the galactic center. LSR1425+71 has a luminosity andcolors consistent with its metal-poor subdwarf spectral classification, whileLSR1610-00 has a luminosity and most colors indicative of being only mildlymetal-poor, plus a uniquely red B-V color. The companion to LSR1610-00 must bea low-mass, substellar brown dwarf. We speculate on the paradoxical nature ofLSR1610-00 and possible sources of its peculiarities.

Trigonometric Parallaxes for Two Late-Type Subdwarfs: LSR1425+71 (sdM8.0) and the Binary LSR1610-00 (sd?M6pec)