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20 Massalia

Asteroid profile

Class: MBA
Family: Massalia
Tholen: S
SMASSII: S
GAjpl: 0.241
GAminorpl: 0.2027
Notes on albedo parameters:

Total observations: 65

Bands: B, G, H, I, J, R, U, V

Observatories: CASLEO, Calern, Catalina, CrAO, Palomar, Sanglok, Steward 2.3

References: 1976b Zellner, 2003 Belskaya, 2011 Gil-Hutton, 2017 Devogele, 2022 Masiero, 2025 Masiero, Unpbl Kiselev, Unpbl Lupishko

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
1998 / 10 / 25.85 U 0.08 0.31 0.11 128.3 9.6 -0.28 101.7 None CrAO 2003 Belskaya
1998 / 10 / 24.9 U 0.58 0.11 0.12 122.5 24.0 -0.01 137.3 None CrAO 2003 Belskaya
1998 / 10 / 22.91 U 1.67 0.46 0.08 63.3 5.2 -0.44 81.7 None CrAO 2003 Belskaya
1998 / 10 / 22.06 U 2.13 0.36 0.19 88.7 13.9 -0.29 107.5 None CrAO 2003 Belskaya
1998 / 10 / 20.02 U 3.25 0.44 0.1 69.6 6.7 -0.44 88.8 None CrAO 2003 Belskaya
1987 / 11 / 16.99 U 8.7 0.78 0.09 83.6 3.2 -0.78 None None CrAO Unpbl Lupishko
1987 / 11 / 16.846 U 8.8 0.84 0.14 82.9 4.8 -0.84 None 75.1 Sanglok Unpbl Kiselev
1987 / 12 / 18.712 U 9.4 0.6 0.11 71.9 5.1 -0.59 None 77.3 Sanglok Unpbl Kiselev
1998 / 10 / 25.85 B 0.08 0.06 0.04 112.1 17.9 -0.06 85.5 None CrAO 2003 Belskaya
1998 / 10 / 24.9 B 0.58 0.24 0.04 73.9 4.8 -0.24 88.7 None CrAO 2003 Belskaya
1998 / 10 / 22.91 B 1.67 0.36 0.04 66.7 3.2 -0.35 85.1 None CrAO 2003 Belskaya
1998 / 10 / 22.06 B 2.13 0.48 0.06 70.1 3.3 -0.48 88.9 None CrAO 2003 Belskaya
1998 / 10 / 20.02 B 3.25 0.49 0.04 73.5 1.7 -0.49 92.7 None CrAO 2003 Belskaya
1974 / 04 / 22.38 B 6.2 0.74 0.1 None None -0.74 88.2 None Catalina 1976b Zellner
1987 / 11 / 16.99 B 8.7 0.76 0.04 84.0 1.6 -0.76 None None CrAO Unpbl Lupishko
1987 / 11 / 16.874 B 8.8 0.72 0.07 79.0 2.8 -0.7 None 75.1 Sanglok Unpbl Kiselev
1987 / 12 / 17.714 B 9.0 0.61 0.06 74.7 2.6 -0.61 None 77.2 Sanglok Unpbl Kiselev
1987 / 12 / 18.658 B 9.4 0.63 0.04 77.4 1.7 -0.63 None 77.3 Sanglok Unpbl Kiselev
1974 / 04 / 12.4 B 10.61 0.65 0.07 None None -0.65 88.0 None Catalina 1976b Zellner
1974 / 04 / 01.42 B 14.56 0.39 0.04 None None -0.39 88.0 None Catalina 1976b Zellner
1974 / 03 / 26.37 B 16.82 0.19 0.12 None None -0.18 95.3 None Catalina 1976b Zellner
1975 / 06 / 14.42 B 19.95 0.11 0.05 None None 0.11 4.9 None Catalina 1976b Zellner
1974 / 07 / 24.19 B 22.21 0.29 0.07 None None 0.29 3.2 None Catalina 1976b Zellner
1974 / 02 / 22.43 B 23.17 0.4 0.04 None None 0.39 -5.7 None Catalina 1976b Zellner
1974 / 04 / 22.36 G 6.21 0.65 0.1 None None -0.65 88.2 None Catalina 1976b Zellner
1974 / 03 / 26.35 G 16.82 0.28 0.12 None None -0.28 93.3 None Catalina 1976b Zellner
1975 / 06 / 14.41 G 19.95 0.01 0.05 None None 0.01 4.1 None Catalina 1976b Zellner
1974 / 07 / 12.23 G 21.36 0.15 0.06 None None 0.15 3.3 None Steward 2.3 1976b Zellner
1974 / 02 / 22.41 G 23.17 0.3 0.06 None None 0.3 0.6 None Catalina 1976b Zellner
1998 / 10 / 25.85 V 0.08 0.09 0.05 67.1 14.2 -0.09 40.5 None CrAO 2003 Belskaya
1998 / 10 / 24.9 V 0.58 0.44 0.05 66.1 2.9 -0.41 80.8 None CrAO 2003 Belskaya
1998 / 10 / 22.91 V 1.67 0.41 0.04 72.0 2.7 -0.4 90.4 None CrAO 2003 Belskaya
1998 / 10 / 22.06 V 2.13 0.5 0.05 68.0 2.9 -0.5 86.8 None CrAO 2003 Belskaya
1998 / 10 / 20.02 V 3.25 0.49 0.04 70.9 2.0 -0.49 90.1 None CrAO 2003 Belskaya
1987 / 11 / 16.99 V 8.7 0.7 0.04 83.2 1.8 -0.7 None None CrAO Unpbl Lupishko
1987 / 11 / 16.883 V 8.8 0.54 0.07 89.8 3.8 -0.53 None 75.1 Sanglok Unpbl Kiselev
1987 / 12 / 18.625 V 9.4 0.65 0.04 74.6 1.7 -0.65 None 77.3 Sanglok Unpbl Kiselev
2008 / 05 / 05 V 14.7 0.36 0.06 97.9 4.6 -0.35 None 90.2 CASLEO 2011 Gil-Hutton
2015 / 02 / 19 V 22.38 None 0.05 None None 0.25 None None Calern 2017 Devogele
1998 / 10 / 25.85 R 0.08 0.06 0.03 67.2 12.8 -0.06 40.6 None CrAO 2003 Belskaya
1998 / 10 / 24.9 R 0.58 0.42 0.03 66.7 1.9 -0.4 81.5 None CrAO 2003 Belskaya
1998 / 10 / 22.91 R 1.67 0.38 0.03 69.4 2.5 -0.38 87.8 None CrAO 2003 Belskaya
1998 / 10 / 22.06 R 2.13 0.49 0.03 68.1 1.9 -0.49 86.9 None CrAO 2003 Belskaya
1998 / 10 / 20.02 R 3.25 0.56 0.02 69.7 1.0 -0.56 88.8 None CrAO 2003 Belskaya
1987 / 11 / 16.99 R 8.7 0.74 0.03 84.8 1.3 -0.74 None None CrAO Unpbl Lupishko
1987 / 11 / 16.895 R 8.8 0.53 0.07 87.7 3.8 -0.53 None 75.1 Sanglok Unpbl Kiselev
1987 / 12 / 17.68 R 9.0 0.68 0.05 73.6 2.2 -0.67 None 77.2 Sanglok Unpbl Kiselev
1987 / 12 / 18.601 R 9.4 0.7 0.04 77.1 1.6 -0.7 None 77.3 Sanglok Unpbl Kiselev
2008 / 05 / 05 R 14.7 0.56 0.07 92.6 3.4 -0.56 None 90.2 CASLEO 2011 Gil-Hutton
2015 / 02 / 19 R 22.38 None 0.04 None None 0.18 None None Calern 2017 Devogele
1998 / 10 / 25.85 I 0.08 0.15 0.05 38.8 8.7 -0.15 12.2 None CrAO 2003 Belskaya
1998 / 10 / 24.9 I 0.58 0.53 0.04 65.5 2.1 -0.5 80.3 None CrAO 2003 Belskaya
1998 / 10 / 22.91 I 1.67 0.43 0.04 66.9 2.4 -0.43 85.4 None CrAO 2003 Belskaya
1998 / 10 / 22.06 I 2.13 0.52 0.05 68.1 2.7 -0.52 86.9 None CrAO 2003 Belskaya
1998 / 10 / 20.02 I 3.25 0.61 0.03 70.2 1.0 -0.61 89.4 None CrAO 2003 Belskaya
1987 / 11 / 16.99 I 8.7 0.79 0.03 82.6 1.0 -0.79 None None CrAO Unpbl Lupishko
2024 / 10 / 07 H 3.9 None 0.1 None 4.6 -0.64 86.2 None Palomar 2025 Masiero
2023 / 07 / 26 H 15.2 None 0.1 None 4.9 -0.59 87.9 None Palomar 2025 Masiero
2023 / 08 / 26 H 20.7 None 0.1 None 12.7 -0.24 118.4 None Palomar 2025 Masiero
2022 / 04 / 02 H 23.9 None 0.1 None 11.5 0.25 2.8 None Palomar 2025 Masiero
2021 / 11 / 08 H 28.7 None 0.02 None 0.2 0.81 170.2 None Palomar 2022 Masiero
2023 / 07 / 26 J 15.2 None 0.1 None 7.2 -0.41 91.3 None Palomar 2025 Masiero
2023 / 08 / 26 J 20.7 None 0.11 None 22.6 -0.13 72.4 None Palomar 2025 Masiero
2022 / 04 / 02 J 23.9 None 0.1 None 13.1 0.22 167.7 None Palomar 2025 Masiero
2021 / 11 / 08 J 28.7 None 0.04 None 0.5 0.74 169.0 None Palomar 2022 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