Gordon Chin has served as Project Scientist for the Lunar Reconnaissance Orbiter and for the Submillimeter Wave Astronomy Satellite. He is currently a Co-Investigator for the Lunar Exploration Neutron Detector (LEND). He was the Principal Investigator for Vesper, submitted as a Discovery-class Planetary Mission to Venus. He is PI for the MATISSE project Submillimeter Enceladus Life Fundamentals Instrument (SELFI), PI for the Radical Innovation Initiative Wideband Imaging Submillimeter Heterodyne Spectrometer (WISHeS) a Radical Innovation Initiative IRAD, and CoI on Submillimeter Solar Observation Lunar Volatiles Experiment (SSOLVE) a DALI maturation project.
SELFI Science Objectives: SELFI observes simultaneously 14 molecular species that are important in the context of life and habitability (five of CHNOPS elements necessary for life) of the Enceladus’ subsurface ocean.
Technical Objectives:
Project Motivation: Submillimeter spectroscopy is a powerful remote sensing tool to study numerous Solar System targets including Earth. The spectral regions in the submillimeter are rich in molecular transitions that probe chemistry and dynamics of planetary atmospheres
⟶ e.g., for Venus: H2O, H218O, H217O, H2O2, NH3, H2S, HDO, SO, SO2 , OCS, 12CO, 13CO, ClO, HCl
Three Year Objectives:
ScienceObjective:
Platform: Lander; adaptable to Orbiter
Measurement Scxheme:
2013 Robert H. Goddard Exceptional Achievement – NASA Transit of Venus Outreach
2013 Robert H. Goddard Exceptional Achievement – LRO Science Mission Team
2011 NASA Group Achievement Award – LRO Mission Operations Team
2011 NASA Group Achievement Award – LRO Instrument Team
2010 NASA Group Achievement Award – LRO Mission Team
2010 NASA Group Achievement Award – LRO Public Outreach Team
2009 Robert H. Goddard Exceptional Achievement – LRO Mission Team
2004 NASA Group Achievement Award – SWAS Team
1995 Goddard Special Act Group Award – SWAS I&T Team
1994 NASA Exceptional Achievement Medal
Livengood, T., I. Mitrofanov, G. Chin, et al. W. Boynton, J. Bodnarik, L. Evans, K. Harshman, M. Litvak, T. McClanahan, R. Sagdeev, A. Sanin, R. Starr, and J. Su. 2018. "Background and lunar neutron populations detected by LEND and average concentration of near-surface hydrogen near the Moon's poles." Planetary and Space Science, 162: 89–104 [10.1016/j.pss.2017.12.004]
Starr, R. D., M. L. Litvak, N. E. Petro, et al. I. G. Mitrofanov, W. V. Boynton, G. Chin, T. A. Livengood, T. P. McClanahan, A. B. Sanin, R. Z. Sagdeev, and J. J. Su. 2018. "Crater age and hydrogen content in lunar regolith from LEND neutron data." Planetary and Space Science, 162: 105–112 [10.1016/j.pss.2017.08.001]
Su, J. J., T. P. Mcclanahan, A. M. Parsons, et al. R. Sagdeev, W. Boynton, G. Chin, T. A. Livengood, R. D. Starr, and D. Hamara. 2018. "Calibration and Validation of the Lunar Exploration Neutron Detector (LEND) Observations for the Study of the Moon's Volatiles." Space Science Reviews, (Submitted)
Sanin, A., I. Mitrofanov, M. Litvak, et al. B. Bakhtin, J. Bodnarik, W. Boynton, G. Chin, L. Evans, K. Harshman, F. Fedosov, D. Golovin, A. Kozyrev, T. Livengood, A. Malakhov, T. McClanahan, M. Mokrousov, R. Starr, R. Sagdeev, V. Tret'yakov, and A. Vostrukhin. 2017. "Hydrogen distribution in the lunar polar regions." Icarus, 283: 20-30 [10.1016/j.icarus.2016.06.002]
Litvak, M., I. Mitrofanov, A. Sanin, et al. B. Bakhtin, J. Bodnarik, W. Boynton, G. Chin, L. Evans, K. Harshman, T. Livengood, A. Malakhov, M. Mokrousov, Т. McClanahan, R. Sagdeev, and R. Starr. 2016. "The variations of neutron component of lunar radiation background from LEND/LRO observations." Planetary and Space Science, 122: 53-65 [10.1016/j.pss.2016.01.006]
Mcclanahan, T. P., I. G. Mitrofanov, W. V. Boynton, et al. G. Chin, J. Bodnarik, G. Droege, L. G. Evans, D. Golovin, D. Hamara, K. Harshman, M. Litvak, T. A. Livengood, A. Malakhov, E. Mazarico, G. Nandikotkur, A. M. Parsons, R. Sagdeev, A. Sanin, R. D. Starr, J. J. Su, and J. Murray. 2015. "Evidence for the sequestration of hydrogen-bearing volatiles towards the Moon’s southern pole-facing slopes." Icarus, 255: 88-99 [10.1016/j.icarus.2014.10.001]
McClanahan, T., I. Mitrofanov, W. Boynton, et al. G. Chin, J. Bodnarik, G. Droege, L. Evans, D. Golovin, D. Hamara, K. Harshman, M. Litvak, T. Livengood, A. Malakhov, E. Mazarico, G. Milikh, G. Nandikotkur, A. Parsons, R. Sagdeev, A. Sanin, R. Starr, J. Su, and J. Murray. 2015. "Evidence for the sequestration of hydrogen-bearing volatiles towards the Moon’s southern pole-facing slopes." Icarus, 255: 88-99 [10.1016/j.icarus.2014.10.001]
Livengood, T., G. Chin, R. Sagdeev, et al. I. Mitrofanov, W. Boynton, L. Evans, M. Litvak, T. McClanahan, A. Sanin, R. Starr, and J. Su. 2015. "Moonshine: Diurnally varying hydration through natural distillation on the Moon, detected by the Lunar Exploration Neutron Detector (LEND)." Icarus, 255: 100-115 [10.1016/j.icarus.2015.04.004]
Mcclanahan, T. P., I. G. Mitrofanov, W. V. Boynton, et al. G. Chin, J. Bodnarik, G. Droege, L. G. Evans, D. Golovin, D. Hamara, K. Harshman, M. Litvak, T. A. Livengood, A. Malakhov, E. Mazarico, G. Milikh, G. Nandikotkur, A. M. Parsons, R. Sagdeev, A. Sanin, R. D. Starr, J. J. Su, and J. Murray. 2015. "Evidence for the sequestration of hydrogen-bearing volatiles towards the Moon’s southern pole-facing slopes." Icarus, 255: 88-99 [10.1016/j.icarus.2014.10.001]
Litvak, M., I. R. Mitrofanov, W. Boynton, et al. G. Chin, G. Droege, L. Evans, J. Garvin, D. Golovin, K. Harshman, T. McClanahan, A. Malakhov, M. Mokrousov, E. Mazarico, G. Milikh, G. A. Neumann, R. Sagdeev, A. Sanin, D. Smith, R. Starr, and M. T. Zuber. 2012. "Global Maps of Lunar Neutron Flux from LEND Instrument." JOURNAL OF GEOPHYSICAL RESEARCH, JE003949: 18 [10.1029/2011JE003949]
Sanin, A., I. Mitrofanov, M. Litvak, et al. A. Malakhov, W. Boynton, G. Chin, G. Droege, L. Evans, J. Garvin, D. Golovin, K. Harshman, T. McClanahan, M. Mokrousov, E. Mazarico, G. Milikh, G. A. Neumann, R. Sagdeev, D. Smith, R. Starr, and M. Zuber. 2012. "Testing lunar permanently shadowed regions for water ice: LEND results from LRO." JOURNAL OF GEOPHYSICAL RESEARCH, 117: E00H26 [ 10.1029/2011JE003971]
Mitrofanov, I., A. Sanin, W. Boynton, et al. G. Chin, J. Garvin, D. Golovin, L. G. Evans, K. Harshman, A. Kozyrev, M. Litvak, A. Malakhov, E. M. Mazarico, T. P. Mcclanahan, G. Milikh, M. Mokrousov, G. Nandikotkur, G. A. Neumann, I. Nuzhdin, R. Sagdeev, V. Shevchenko, V. Shvetsov, D. E. Smith, R. D. Starr, V. Tretyakov, J. I. Trombka, D. Usikov, A. Varenikov, A. Vostrukhin, and M. T. Zuber. 2010. "Hydrogen Mapping of the Lunar South Pole Using the LRO Neutron Detector Experiment LEND." Science, 330 (6003): 483-486 [Full Text (Link)] [10.1126/science.1185696]
Vondrak, R., J. Keller, G. Chin, and J. Garvin. 2010. "Lunar Reconnaissance Orbiter (LRO): Observations for Lunar Exploration and Science." Space Science Reviews, 150: 7 [Full Text (Link)] [10.1007/s11214-010-9631-5]
Mitrofanov, I. G., A. Bartels, Y. I. Bobrovnitsky, et al. W. Boynton, G. Chin, H. Enos, L. Evans, S. Floyd, J. Garvin, D. V. Golovin, A. S. Grebennikov, K. Harshman, L. L. Kazakov, J. Keller, A. A. Konovalov, A. S. Kozyrev, A. R. Krylov, M. L. Litvak, A. V. Malakhov, T. McClanahan, G. M. Milikh, M. I. Mokrousov, S. Ponomareva, R. Z. Sagdeev, A. B. Sanin, V. V. Shevchenko, V. N. Shvetsov, R. Starr, G. N. Timoshenko, T. M. Tomilina, V. I. Tretyakov, J. Trombka, V. S. Troshin, V. N. Uvarov, A. B. Varennikov, and A. A. Vostrukhin. 2010. "Lunar Exploration Neutron Detector for the NASA Lunar Reconnaissance Orbiter." Space Science Reviews, 150: 183 [Full Text (Link)] [10.1007/s11214-009-9608-4]
Mitrofanov, I. G., A. B. Sanin, D. V. Golovin, et al. M. L. Litvak, A. A. Konovalov, A. A. Kozyrev, A. V. Malakhov, M. I. Mokrousov, V. I. Tretyakov, V. S. Troshin, V. N. Uvarov, A. B. Varenikov, A. A. Vostrukhin, V. V. Shevchenko, V. N. Shvetsov, A. R. Krylov, G. N. Timoshenko, Y. I. Bobrovnitsky, T. M. Tomilina, A. S. Grebennikov, L. L. Kazakov, R. Z. Sagdeev, G. N. Milikh, A. Bartels, G. Chin, S. Floyd, J. Garvin, J. Keller, T. McClanahan, J. Trombka, W. Boynton, K. Harshman, R. Starr, and L. Evans. 2008. "Experiment LEND of the NASA Lunar Reconnaissance Orbiter for High-Resolution Mapping of Neutron Emission of the Moon." Astrobiology, 8: 793 [Full Text (Link)] [10.1089/ast.2007.0158]
Chin, G., S. Brylow, M. Foote, et al. J. Garvin, J. Kasper, J. Keller, M. Litvak, I. Mitrofanov, D. Paige, K. Raney, M. Robinson, A. Sanin, D. Smith, H. Spence, P. Spudis, S. A. Stern, and M. Zuber. 2007. "Lunar Reconnaissance Orbiter Overview: The Instrument Suite and Mission." Space Science Reviews, 129: 391 [Full Text (Link)] [10.1007/s11214-007-9153-y]
Fok, M.-C., T. E. Moore, M. R. Collier, G. Chin, and T. Tanaka. 2003. "Neutral atom imaging of solar wind interaction with the Earth and Venus." EGS - AGU - EUG Joint Assembly, 4437-:
Mumma, M. J., T. Kostiuk, D. Buhl, G. Chin, and D. Zipoy. 1982. "Infrared Heterodyne Spectroscopy." Optical Engineering, 21: 313.
Mumma, M. J., T. Kostiuk, D. Buhl, D. Deming, and G. Chin. 1981. "Infrared Heterodyne Spectroscopy." Infrared Astronomy- Scientific/Military Thrusts and Instrumentation, SPIE 280: 111.
Mumma, M. J., D. Buhl, G. Chin, et al. L. D. Deming, F. Espenak, T. Kostiuk, and D. Zipoy. 1981. "Discovery of Natural Gain Amplification in the 10-Micrometer Carbon Dioxide Laser Bands on Mars: A Natural Laser." Science, 212: 45.
Buhl, D., G. Chin, D. A. Glenar, et al. J. J. Hillman, T. Kostiuk, J. C. Mather, M. J. Mumma, F. O. Clark, L. E. Snyder, F. J. Lovas, D. F. Dickinson, and A. C. Dinger. 1980. "Vibrationally Excited Silicon Monoxide Masers." Proc. of the IAU Symposium No. 87, 537-538.
Buhl, D., G. Chin, J. Faris, et al. T. Kostiuk, M. J. Mumma, and D. Zipoy. 1980. "A 10 Micron Heterodyne Receiver for Ultra-High Resolution Astronomical Spectroscopy." Proc. of the IAU Symposium, 87: 633-638.
Kostiuk, T., M. J. Mumma, G. Chin, D. Buhl, and M. M. Abbas. 1979. "Temperature Sounding the Atmosphere of Venus by Infrared Heterodyne Spectroscopy of 12C16O2." EOS, 60: 868.
Gordon Chin has served as Project Scientist for the Lunar Reconnaissance Orbiter and for the Submillimeter Wave Astronomy Satellite. He is currently a Co-Investigator for the Lunar Exploration Neutron Detector (LEND). He was the Principal Investigator for Vesper, submitted as a Discovery-class Planetary Mission to Venus. He is PI for the MATISSE project Submillimeter Enceladus Life Fundamentals Instrument (SELFI), PI for the Radical Innovation Initiative Wideband Imaging Submillimeter Heterodyne Spectrometer (WISHeS) a Radical Innovation Initiative IRAD, and CoI on Submillimeter Solar Observation Lunar Volatiles Experiment (SSOLVE) a DALI maturation project.
Livengood, T., I. Mitrofanov, G. Chin, et al. W. Boynton, J. Bodnarik, L. Evans, K. Harshman, M. Litvak, T. McClanahan, R. Sagdeev, A. Sanin, R. Starr, and J. Su. 2018. "Background and lunar neutron populations detected by LEND and average concentration of near-surface hydrogen near the Moon's poles." Planetary and Space Science 162 89–104 [10.1016/j.pss.2017.12.004]
Starr, R. D., M. L. Litvak, N. E. Petro, et al. I. G. Mitrofanov, W. V. Boynton, G. Chin, T. A. Livengood, T. P. McClanahan, A. B. Sanin, R. Z. Sagdeev, and J. J. Su. 2018. "Crater age and hydrogen content in lunar regolith from LEND neutron data." Planetary and Space Science 162 105–112 [10.1016/j.pss.2017.08.001]
Su, J. J., T. P. Mcclanahan, A. M. Parsons, et al. R. Sagdeev, W. Boynton, G. Chin, T. A. Livengood, R. D. Starr, and D. Hamara. 2018. "Calibration and Validation of the Lunar Exploration Neutron Detector (LEND) Observations for the Study of the Moon's Volatiles." Space Science Reviews (Submitted)
Sanin, A., I. Mitrofanov, M. Litvak, et al. B. Bakhtin, J. Bodnarik, W. Boynton, G. Chin, L. Evans, K. Harshman, F. Fedosov, D. Golovin, A. Kozyrev, T. Livengood, A. Malakhov, T. McClanahan, M. Mokrousov, R. Starr, R. Sagdeev, V. Tret'yakov, and A. Vostrukhin. 2017. "Hydrogen distribution in the lunar polar regions." Icarus 283 20-30 [10.1016/j.icarus.2016.06.002]
Litvak, M., I. Mitrofanov, A. Sanin, et al. B. Bakhtin, J. Bodnarik, W. Boynton, G. Chin, L. Evans, K. Harshman, T. Livengood, A. Malakhov, M. Mokrousov, Т. McClanahan, R. Sagdeev, and R. Starr. 2016. "The variations of neutron component of lunar radiation background from LEND/LRO observations." Planetary and Space Science 122 53-65 [10.1016/j.pss.2016.01.006]
Mcclanahan, T. P., I. G. Mitrofanov, W. V. Boynton, et al. G. Chin, J. Bodnarik, G. Droege, L. G. Evans, D. Golovin, D. Hamara, K. Harshman, M. Litvak, T. A. Livengood, A. Malakhov, E. Mazarico, G. Nandikotkur, A. M. Parsons, R. Sagdeev, A. Sanin, R. D. Starr, J. J. Su, and J. Murray. 2015. "Evidence for the sequestration of hydrogen-bearing volatiles towards the Moon’s southern pole-facing slopes." Icarus 255 88-99 [10.1016/j.icarus.2014.10.001]
McClanahan, T., I. Mitrofanov, W. Boynton, et al. G. Chin, J. Bodnarik, G. Droege, L. Evans, D. Golovin, D. Hamara, K. Harshman, M. Litvak, T. Livengood, A. Malakhov, E. Mazarico, G. Milikh, G. Nandikotkur, A. Parsons, R. Sagdeev, A. Sanin, R. Starr, J. Su, and J. Murray. 2015. "Evidence for the sequestration of hydrogen-bearing volatiles towards the Moon’s southern pole-facing slopes." Icarus 255 88-99 [10.1016/j.icarus.2014.10.001]
Livengood, T., G. Chin, R. Sagdeev, et al. I. Mitrofanov, W. Boynton, L. Evans, M. Litvak, T. McClanahan, A. Sanin, R. Starr, and J. Su. 2015. "Moonshine: Diurnally varying hydration through natural distillation on the Moon, detected by the Lunar Exploration Neutron Detector (LEND)." Icarus 255 100-115 [10.1016/j.icarus.2015.04.004]
Mcclanahan, T. P., I. G. Mitrofanov, W. V. Boynton, et al. G. Chin, J. Bodnarik, G. Droege, L. G. Evans, D. Golovin, D. Hamara, K. Harshman, M. Litvak, T. A. Livengood, A. Malakhov, E. Mazarico, G. Milikh, G. Nandikotkur, A. M. Parsons, R. Sagdeev, A. Sanin, R. D. Starr, J. J. Su, and J. Murray. 2015. "Evidence for the sequestration of hydrogen-bearing volatiles towards the Moon’s southern pole-facing slopes." Icarus 255 88-99 [10.1016/j.icarus.2014.10.001]
Litvak, M., I. R. Mitrofanov, W. Boynton, et al. G. Chin, G. Droege, L. Evans, J. Garvin, D. Golovin, K. Harshman, T. McClanahan, A. Malakhov, M. Mokrousov, E. Mazarico, G. Milikh, G. A. Neumann, R. Sagdeev, A. Sanin, D. Smith, R. Starr, and M. T. Zuber. 2012. "Global Maps of Lunar Neutron Flux from LEND Instrument." JOURNAL OF GEOPHYSICAL RESEARCH JE003949 18 [10.1029/2011JE003949]
Sanin, A., I. Mitrofanov, M. Litvak, et al. A. Malakhov, W. Boynton, G. Chin, G. Droege, L. Evans, J. Garvin, D. Golovin, K. Harshman, T. McClanahan, M. Mokrousov, E. Mazarico, G. Milikh, G. A. Neumann, R. Sagdeev, D. Smith, R. Starr, and M. Zuber. 2012. "Testing lunar permanently shadowed regions for water ice: LEND results from LRO." JOURNAL OF GEOPHYSICAL RESEARCH 117 E00H26 [ 10.1029/2011JE003971]
Mitrofanov, I., A. Sanin, W. Boynton, et al. G. Chin, J. Garvin, D. Golovin, L. G. Evans, K. Harshman, A. Kozyrev, M. Litvak, A. Malakhov, E. M. Mazarico, T. P. Mcclanahan, G. Milikh, M. Mokrousov, G. Nandikotkur, G. A. Neumann, I. Nuzhdin, R. Sagdeev, V. Shevchenko, V. Shvetsov, D. E. Smith, R. D. Starr, V. Tretyakov, J. I. Trombka, D. Usikov, A. Varenikov, A. Vostrukhin, and M. T. Zuber. 2010. "Hydrogen Mapping of the Lunar South Pole Using the LRO Neutron Detector Experiment LEND." Science 330 (6003): 483-486 [Full Text (Link)] [10.1126/science.1185696]
Vondrak, R., J. Keller, G. Chin, and J. Garvin. 2010. "Lunar Reconnaissance Orbiter (LRO): Observations for Lunar Exploration and Science." Space Science Reviews 150 7 [Full Text (Link)] [10.1007/s11214-010-9631-5]
Mitrofanov, I. G., A. Bartels, Y. I. Bobrovnitsky, et al. W. Boynton, G. Chin, H. Enos, L. Evans, S. Floyd, J. Garvin, D. V. Golovin, A. S. Grebennikov, K. Harshman, L. L. Kazakov, J. Keller, A. A. Konovalov, A. S. Kozyrev, A. R. Krylov, M. L. Litvak, A. V. Malakhov, T. McClanahan, G. M. Milikh, M. I. Mokrousov, S. Ponomareva, R. Z. Sagdeev, A. B. Sanin, V. V. Shevchenko, V. N. Shvetsov, R. Starr, G. N. Timoshenko, T. M. Tomilina, V. I. Tretyakov, J. Trombka, V. S. Troshin, V. N. Uvarov, A. B. Varennikov, and A. A. Vostrukhin. 2010. "Lunar Exploration Neutron Detector for the NASA Lunar Reconnaissance Orbiter." Space Science Reviews 150 183 [Full Text (Link)] [10.1007/s11214-009-9608-4]
Mitrofanov, I. G., A. B. Sanin, D. V. Golovin, et al. M. L. Litvak, A. A. Konovalov, A. A. Kozyrev, A. V. Malakhov, M. I. Mokrousov, V. I. Tretyakov, V. S. Troshin, V. N. Uvarov, A. B. Varenikov, A. A. Vostrukhin, V. V. Shevchenko, V. N. Shvetsov, A. R. Krylov, G. N. Timoshenko, Y. I. Bobrovnitsky, T. M. Tomilina, A. S. Grebennikov, L. L. Kazakov, R. Z. Sagdeev, G. N. Milikh, A. Bartels, G. Chin, S. Floyd, J. Garvin, J. Keller, T. McClanahan, J. Trombka, W. Boynton, K. Harshman, R. Starr, and L. Evans. 2008. "Experiment LEND of the NASA Lunar Reconnaissance Orbiter for High-Resolution Mapping of Neutron Emission of the Moon." Astrobiology 8 793 [Full Text (Link)] [10.1089/ast.2007.0158]
Chin, G., S. Brylow, M. Foote, et al. J. Garvin, J. Kasper, J. Keller, M. Litvak, I. Mitrofanov, D. Paige, K. Raney, M. Robinson, A. Sanin, D. Smith, H. Spence, P. Spudis, S. A. Stern, and M. Zuber. 2007. "Lunar Reconnaissance Orbiter Overview: The Instrument Suite and Mission." Space Science Reviews 129 391 [Full Text (Link)] [10.1007/s11214-007-9153-y]
Fok, M.-C., T. E. Moore, M. R. Collier, G. Chin, and T. Tanaka. 2003. "Neutral atom imaging of solar wind interaction with the Earth and Venus." EGS - AGU - EUG Joint Assembly 4437-
Mumma, M. J., T. Kostiuk, D. Buhl, G. Chin, and D. Zipoy. 1982. "Infrared Heterodyne Spectroscopy." Optical Engineering 21 313
Mumma, M. J., T. Kostiuk, D. Buhl, D. Deming, and G. Chin. 1981. "Infrared Heterodyne Spectroscopy." Infrared Astronomy- Scientific/Military Thrusts and Instrumentation SPIE 280 111.
Mumma, M. J., D. Buhl, G. Chin, et al. L. D. Deming, F. Espenak, T. Kostiuk, and D. Zipoy. 1981. "Discovery of Natural Gain Amplification in the 10-Micrometer Carbon Dioxide Laser Bands on Mars: A Natural Laser." Science 212 45
Buhl, D., G. Chin, D. A. Glenar, et al. J. J. Hillman, T. Kostiuk, J. C. Mather, M. J. Mumma, F. O. Clark, L. E. Snyder, F. J. Lovas, D. F. Dickinson, and A. C. Dinger. 1980. "Vibrationally Excited Silicon Monoxide Masers." Proc. of the IAU Symposium No. 87 537-538
Buhl, D., G. Chin, J. Faris, et al. T. Kostiuk, M. J. Mumma, and D. Zipoy. 1980. "A 10 Micron Heterodyne Receiver for Ultra-High Resolution Astronomical Spectroscopy." Proc. of the IAU Symposium 87 633-638
Kostiuk, T., M. J. Mumma, G. Chin, D. Buhl, and M. M. Abbas. 1979. "Temperature Sounding the Atmosphere of Venus by Infrared Heterodyne Spectroscopy of 12C16O2." EOS 60 868