18 Melpomene

Asteroid profile

Class: MBA

Family: MB-inner

Tholen: S

SMASSII: S

GAjpl: 0.181

GAminorpl: 0.2634

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: 35

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

Observatories: CASLEO, CASLEO 2.15, Calern, Catalina, Sanglok, Steward 2.3

References: 1976b Zellner, 2011 Gil-Hutton, 2014 Gil-Hutton, 2017 Devogele, Unpbl Kiselev

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
1974 / 08 / 26.34	U	8.71	0.85	0.03	None	None	-0.85	90.6	None	Steward 2.3	1976b Zellner
2005 / 09 / 27	U	28.0	None	0.3	None	7.7	0.99	2.4	None	CASLEO 2.15	2014 Gil-Hutton
1974 / 08 / 09.32	B	3.04	0.56	0.02	None	None	-0.56	89.5	None	Catalina	1976b Zellner
1974 / 08 / 26.33	B	8.7	0.77	0.01	None	None	-0.77	90.9	None	Steward 2.3	1976b Zellner
1988 / 08 / 18.819	B	9.2	0.87	0.04	71.4	1.2	-0.86	None	250.5	Sanglok	Unpbl Kiselev
1974 / 07 / 24.31	B	11.61	0.77	0.02	None	None	-0.77	90.2	None	Catalina	1976b Zellner
1974 / 09 / 08.27	B	16.09	0.44	0.01	None	None	-0.44	90.9	None	Steward 2.3	1976b Zellner
1974 / 07 / 11.42	B	17.48	0.38	0.01	None	None	-0.38	87.4	None	Steward 2.3	1976b Zellner
1974 / 07 / 01.36	B	21.03	0.02	0.03	None	None	0.0	44.5	None	Catalina	1976b Zellner
1974 / 06 / 02.36	B	26.61	0.63	0.02	None	None	0.63	0.3	None	Steward 2.3	1976b Zellner
1974 / 05 / 14.46	B	27.41	0.6	0.05	None	None	0.6	2.2	None	Catalina	1976b Zellner
2005 / 09 / 27	B	28.0	None	0.07	None	2.3	0.87	179.0	None	CASLEO 2.15	2014 Gil-Hutton
1974 / 11 / 13.09	B	32.97	1.43	0.02	None	None	1.43	0.2	None	Catalina	1976b Zellner
1974 / 08 / 9.33	G	3.04	0.57	0.02	None	None	-0.57	89.1	None	Catalina	1976b Zellner
1974 / 08 / 26.33	G	8.7	0.79	0.01	None	None	-0.79	89.8	None	Steward 2.3	1976b Zellner
1974 / 07 / 24.32	G	11.6	0.8	0.02	None	None	-0.8	91.8	None	Catalina	1976b Zellner
1974 / 09 / 08.27	G	16.09	0.46	0.01	None	None	-0.46	87.8	None	Steward 2.3	1976b Zellner
1974 / 07 / 11.43	G	17.47	0.44	0.01	None	None	-0.44	91.4	None	Steward 2.3	1976b Zellner
1974 / 07 / 01.37	G	21.02	0.09	0.03	None	None	-0.09	82.7	None	Catalina	1976b Zellner
1974 / 06 / 02.38	G	26.61	0.58	0.03	None	None	0.58	-0.6	None	Steward 2.3	1976b Zellner
1974 / 05 / 14.43	G	27.41	0.65	0.05	None	None	0.65	2.5	None	Catalina	1976b Zellner
1974 / 11 / 13.12	G	32.97	1.34	0.03	None	None	1.34	1.4	None	Catalina	1976b Zellner
2008 / 05 / 05	V	6.3	0.72	0.06	163.1	2.3	-0.71	None	166.5	CASLEO	2011 Gil-Hutton
1988 / 08 / 18.794	V	9.2	0.92	0.04	69.6	1.4	-0.92	None	250.5	Sanglok	Unpbl Kiselev
2008 / 04 / 03	V	11.1	0.83	0.07	85.3	2.4	-0.83	None	84.9	CASLEO	2011 Gil-Hutton
2008 / 05 / 24	V	12.2	0.72	0.08	130.0	3.0	-0.72	None	131.8	CASLEO	2011 Gil-Hutton
2015 / 02 / 19	V	20.25	None	0.05	None	None	-0.28	None	None	Calern	2017 Devogele
2005 / 09 / 27	V	28.0	None	0.08	None	2.5	0.67	172.2	None	CASLEO 2.15	2014 Gil-Hutton
2008 / 05 / 05	R	6.3	0.7	0.07	163.6	2.7	-0.71	None	166.5	CASLEO	2011 Gil-Hutton
1988 / 08 / 18.773	R	9.2	0.9	0.03	70.5	1.2	-0.9	None	250.5	Sanglok	Unpbl Kiselev
2008 / 05 / 24	R	12.2	0.78	0.05	128.2	1.8	-0.78	None	131.8	CASLEO	2011 Gil-Hutton
2015 / 02 / 19	R	20.25	None	0.05	None	None	0.24	None	None	Calern	2017 Devogele
1988 / 07 / 23.933	R	21.4	0.28	0.02	45.0	7.4	-0.22	None	244.1	Sanglok	Unpbl Kiselev
2005 / 09 / 27	R	28.0	None	0.12	None	3.4	0.91	177.4	None	CASLEO 2.15	2014 Gil-Hutton
2005 / 09 / 27	I	28.0	None	0.04	None	1.4	0.69	175.9	None	CASLEO 2.15	2014 Gil-Hutton

Plot filters

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.

Plot legend

Marker shape → filter group

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

Color → reference