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31 Euphrosyne

Asteroid profile

Class: MBA
Family: Euphrosyne
Tholen: C
SMASSII: Cb
GAjpl: 0.053
GAminorpl: 0.0471
Notes on albedo parameters:

Total observations: 24

Bands: 0.48, 0.62, 0.77, B, G, H, J, R, V

Observatories: CASLEO, CASLEO 2.15, Lulin 1.0, Palomar, Steward 2.3

References: 1976b Zellner, 2012 Gil-Hutton, 2014 Gil-Hutton, 2017a Gil-Hutton, 2022 Kang-Shian Pan, 2025 Masiero

All rows for this asteroid are exported.

Measurements

Sorting: first by filter groups (U-like, B-like, V-like, R-like, I-like, IR), then by filter, then by phase angle.
Date Band Phase P sP Q sQ Pr Qr Psi Obs Ref
2017 / 10 / 18 0.48 22.58 None 0.07 None 3.0 0.62 1.0 None Lulin 1.0 2022 Kang-Shian Pan
2017 / 10 / 17 0.48 22.67 None 0.06 None 2.0 0.62 180.0 None Lulin 1.0 2022 Kang-Shian Pan
1974 / 04 / 10.44 B 9.41 1.32 0.25 None None -1.32 88.8 None Steward 2.3 1976b Zellner
1974 / 04 / 10.46 G 9.41 1.28 0.26 None None -1.28 90.2 None Steward 2.3 1976b Zellner
2008 / 05 / 06 V 3.7 0.83 0.08 95.9 2.7 -0.82 None 91.3 CASLEO 2012 Gil-Hutton
2008 / 04 / 03 V 7.8 1.29 0.07 110.1 1.6 -1.29 None 110.4 CASLEO 2012 Gil-Hutton
2010 / 09 / 03 V 10.5 None 0.06 None 1.5 -1.15 84.4 None CASLEO 2.15 2014 Gil-Hutton
2009 / 04 / 16 V 14.2 1.09 0.1 94.3 2.6 -1.09 None 97.1 CASLEO 2012 Gil-Hutton
2016 / 10 / 29 V 15.5 0.9 0.06 57.7 1.8 -0.88 None 51.5 CASLEO 2017a Gil-Hutton
2017 / 10 / 18 0.62 22.58 None 0.06 None 3.0 0.45 1.0 None Lulin 1.0 2022 Kang-Shian Pan
2017 / 10 / 17 0.62 22.67 None 0.04 None 2.0 0.48 6.0 None Lulin 1.0 2022 Kang-Shian Pan
2008 / 05 / 06 R 3.7 0.85 0.11 94.3 3.8 -0.84 None 91.3 CASLEO 2012 Gil-Hutton
2017 / 10 / 18 0.77 22.58 None 0.08 None 4.0 0.46 176.0 None Lulin 1.0 2022 Kang-Shian Pan
2017 / 10 / 17 0.77 22.67 None 0.04 None 2.0 0.5 6.0 None Lulin 1.0 2022 Kang-Shian Pan
2022 / 10 / 15 H 2.7 None 0.1 None 5.0 -0.58 101.4 None Palomar 2025 Masiero
2024 / 01 / 29 H 14.8 None 0.11 None 4.6 -0.71 89.0 None Palomar 2025 Masiero
2022 / 12 / 01 H 17.4 None 0.1 None 8.9 -0.35 84.9 None Palomar 2025 Masiero
2024 / 05 / 19 H 20.8 None 0.12 None 13.3 0.24 3.2 None Palomar 2025 Masiero
2023 / 01 / 07 H 21.6 None 0.1 None 8.1 0.39 179.6 None Palomar 2025 Masiero
2022 / 10 / 15 J 2.7 None 0.1 None 4.0 -0.75 93.2 None Palomar 2025 Masiero
2024 / 01 / 29 J 14.8 None 0.11 None 3.0 -1.05 87.8 None Palomar 2025 Masiero
2022 / 12 / 01 J 17.4 None 0.1 None 5.3 -0.57 81.8 None Palomar 2025 Masiero
2024 / 05 / 19 J 20.8 None 0.11 None 6.7 0.47 4.6 None Palomar 2025 Masiero
2023 / 01 / 07 J 21.6 None 0.1 None 5.3 0.6 179.0 None Palomar 2025 Masiero

Plot filters

The plot shows Pr, and if it is unavailable, P. Error bars use sP. The same reference is shown in the same color.
Marker shape encodes the filter group. Bottom legend: color = reference.

Plot legend

Marker shape → filter group
Color → reference