140 Siwa

Asteroid profile

Class: MBA

Family: MB-outer

Tholen: P

SMASSII: Xc

GAjpl: 0.0676

GAminorpl: 0.0586

Notes on albedo parameters:

GAjpl — geometric albedo from the NASA JPL Small-Body Database.
GAminorpl — geometric albedo from the Minor Planet Physical Properties Database.

Total observations: 10

Bands: H, J, V

Observatories: Asiago, CASLEO, CASLEO 2.15, Palomar

References: 2006b Fornasier, 2012 Canada-Assandri, 2017 Belskaya, 2019 Lopez-Sistern, 2025 Masiero

All rows for this asteroid are exported.

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
2003 / 02 / 12.981	V	1.0	0.51	0.06	148.1	3.3	-0.44	74.9	163.2	Asiago	2006b Fornasier
2005 / 10 / 28.035	V	2.7	0.57	0.06	35.8	3.0	-0.53	100.7	25.1	Asiago	2006b Fornasier
2008 / 04 / 05	V	8.1	1.4	0.07	125.0	1.5	-1.4	None	123.1	CASLEO	2012 Canada-Assandri
2005 / 12 / 09.85	V	17.28	None	0.05	None	1.0	-0.93	94.4	None	Asiago	2017 Belskaya
2005 / 12 / 20.84	V	19.19	None	0.07	None	2.0	-0.61	81.1	None	Asiago	2017 Belskaya
2018 / 10 / 10	V	26.2	1.06	0.08	171.1	2.2	1.04	None	76.2	CASLEO 2.15	2019 Lopez-Sistern
2023 / 08 / 26	H	20.6	None	0.11	None	4.5	-0.72	85.9	None	Palomar	2025 Masiero
2023 / 07 / 26	H	25.7	None	0.1	None	8.7	0.35	0.8	None	Palomar	2025 Masiero
2023 / 08 / 26	J	20.6	None	0.11	None	4.2	-0.76	93.7	None	Palomar	2025 Masiero
2023 / 07 / 26	J	25.7	None	0.11	None	20.8	-0.14	116.5	None	Palomar	2025 Masiero

The plot shows P_r, 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.

Marker shape → filter group

U-like B-like V-like R-like I-like IR Other

Color → reference