Public Data

classy sources the databases listed alphabetically below to allow for quick comparisons between literature data and your observations.[1] You can download and visualize a spectrum using the command line via the $ classy spectra command. To download all spectra from public repositories, use the $ classy status command.

Available Public Data

Number of Spectra: 68,280

Number of Individual Asteroids: 62,045

24CAS

24 Color Asteroid Survey

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
276	0.33µm	1.1µm	Chapman and Gaffey 1979
10	0.33µm	1.1µm	McFadden+ 1984

Attributes

These spectra do not have any additional attributes.

52CAS

52 Color Asteroid Survey

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
144	0.83µm	2.57µm	Bell+ 1988
2	0.83µm	2.57µm	Cruikshank and Hartmann 1984

Attributes

These spectra do not have any additional attributes.

AKARI AcuA

AKARI Asteroid-catalog-using-AKARI

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
64	2.5µm	5.0µm	Usui+ 2019

Attributes

The following attributes are copied from the AKARI AcuA archive and added to each spectrum. See the AKARI AcuA-spec catalogue description for details.

Attribute	Description
flag_saturation	Saturation flag. 0 if not contaminated, else 1.
falg_thermal	Thermal-emission contamination flag. 0 if not contaminated, else 1.
flag_stellar	Stellar contamination flag. 0 if not contaminated, else 1.

These attributes are added by classy.

Attribute	Description
flag	Merged flag which is 0 if all other flag attributes are 0 as well.

ECAS

Eight Color Asteroid Survey

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
911	0.337µm	1.041µm	Zellner+ 1985

The available spectra are the single-epoch spectra, not the average spectra as e.g. used in Tholen (1984).

Attributes

Compared to the original catalogue, cells with value -9.999 are replaced with np.nan values.

Gaia DR3

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
60 518	0.374µm	1.034µm	Galluccio+ 2022

Attributes

Important

The Gaia spectra show artifical reddening towards the UV. classy automatically applies the correction proposed by Tinaut-Ruano+ 2023.

The following attributes are copied from the Gaia archive and added to each spectrum. See Galluccio+ 2022 for details.

Attribute	Description
wavelength	Wavelength of observation (same as wave).
reflectance_spectrum	Reflectance values (same as refl).
reflectance_spectrum_err	Reflectance error values (same as refl_err).
flag	Photometric quality flag ( 0 = good, 1 = mediore, 2 = bad).
source_id	Gaia source ID.
number_mp	Number of target asteroid.
solution_id	Gaia solution ID.
denomination	Denomination of target asteroid.
nb_samples
num_of_spectra	Number of individual spectra averaged here.

M4AST

Modelling For Asteroids

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
80	0.34µm	2.56µm	Unpublished
1	0.89µm	1.29µm	Birlan & Nedelcu 2018
1	0.48µm	2.50µm	Birlan 2016
30	0.44µm	2.40µm	Fornasier+ 2016
2	0.51µm	1.32m	Birlan+ 2015
2	0.37µm	2.50µm	de León+ 2011
1	0.55µm	2.45µm	Binzel+ 2009
4	0.82µm	2.49µm	Nedelcu+ 2007
1	0.33µm	0.87µm	McFadden+ 1993

Attributes

No additional attributes are added.

MANOS

Mission Accessible Near-Earth Object Spectroscopy

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
197[2]	0.4µm	1.0µm	Devogèle+ 2019

Attributes

These spectra do not have any additional attributes.

MITHNEOS

MIT-Hawaii Near-Earth Object Spectroscopic Survey

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
537	0.337µm	2.49µm	Binzel+ 2019
88	0.65µm	2.49µm	DeMeo+ 2019
475	0.36µm	2.49μm	Marsset+ 2022
36	0.35μm	2.49μm	Polishook+ 2014
769	0.35μm	2.49μm	Unpublished*

Important

Binzel+ 2019 published 805 spectra, however, it is not evident which MITHNEOS spectra this includes. 537 of the 805 can be identified as they are the only spectrum of the respective asteroid in MITHNEOS. These spectra are associated to Binzel+ 2019 in classy. To identify the remaining published spectra, it is necessary to visually compare the published spectra to the spectra in MITHNEOS. Feel free to contribute should you have identified a misreferenced spectrum.

Attributes

The following attributes are copied from the MITHNEOS website and added to each spectrum. The following attributes are copied from the SMASS website and added to each spectrum. See the SMASS website for details.

Attribute	Description
flag	Column 4 of MITHNEOS data, equal to number of SpeX nights averaged. 0 flags bad data.

Misc

Miscellaneous: A collection of spectra published by different observers, not part of larger surveys.

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
1	0.82	2.49	Binzel+ 2001
42	0.82	2.49	Clark+ 2004
52	0.82	2.49	Clark+ 2009
3	0.82	2.49	Clark+ 2010
75	0.39	0.99	Fornasier+ 2004
106	0.33	2.54	Fornasier+ 2010
25	0.68	2.54	Gartrelle+ 2021
1	0.73	2.47	Hardersen+ 2004
59	0.70	2.62	Hardersen+ 2011
8	0.65	2.51	Hardersen+ 2014
9	0.67	2.54	Hardersen+ 2015
14	0.67	2.54	Hardersen+ 2018
17	0.32	2.56	Marsset+ 2014
8	0.4	2.52	Moskovitz+ 2008
51	0.65	2.55	Moskovitz+ 2010
24	0.33	0.97	Moskovitz+ 2020
66	0.82	2.49	Ockert-Bell+ 2008
35	0.82	2.49	Ockert-Bell+ 2010
76	0.45	0.87	Popescu+ 2019
40	0.65	2.57	Reddy 2009
27	0.65	2.50	Reddy and Sanchez 2017
90	0.64	2.50	Reddy and Sanchez 2020
22	0.64	2.55	Reddy+ 2011
5	0.82	2.49	Rivkin+ 2005
94	0.34	1.04	Sawyer 1991
17	0.82	2.49	Shepard+ 2008
12	0.82	2.49	Sunshine+ 2004
8	0.82	2.49	Sunshine+ 2007
7	0.82	2.49	Sunshine+ 2008
37	0.5	0.99	Vilas and McFadden 1992
13	0.46	1.00	Vilas and Smith 1985
1	0.57	1.00	Vilas+ 1985
30	0.31	0.95	Vilas+ 1993
11	0.40	0.95	Willman+ 2008

Attributes

These spectra do not have any additional attributes.

PRIMASS

PRIMitive Asteroids Spectroscopic Survey

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
67	0.34µm	0.92µm	De León+ 2016
101	0.50µm	0.90µm	Morate+ 2016
19	0.40µm	0.87µm	De Prá+ 2018
97	0.50µm	0.90µm	Morate+ 2018
73	0.50µm	0.90µm	Morate+ 2019
53	0.40µm	0.91µm	De Prá+ 2020
28	0.40µm	0.91µm	De Prá+ 2020

Attributes

The following metadata provided by PRIMASS is added:

Attribute	Description
start_t	Time at the start of the observations
stop_t	Time at the end of the observations
N_exp	Number of exposures
tot_exp	Total exposure time
airmass	Airmass at the start of the observation
phase	Phase angle at the time of the observation
r_geo	Geocentric distance at the time of the observation
r_helio	Heliocentric distance at the time of the observation

S3OS2

Small Solar System Objects Spectroscopic Survey

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
820	0.49µm	0.92µm	Lazzaro+ 2004

Attributes

No additional attributes are available for these spectra.

SCAS

Seven Color Asteroid Survey

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
126	0.91µm	2.3µm	Clark+ 1995

Attributes

These spectra do not have any additional attributes.

SMASS

Small Main-Belt Asteroid Spectroscopic Survey

Overview

Number of Spectra	\(\lambda_{min}\)	\(\lambda_{max}\)	Reference
316	0.42µm	1.02µm	Xu+ 1995
63	0.36µm	1.67µm	Binzel+ 2001
1	0.55µm	2.5µm	Binzel+ 2001
1,341	0.44µm	0.93µm	Bus and Binzel 2002
251	0.87µm	1.66µm	Burbine and Binzel 2002
254	0.55µm	1.66µm	Binzel+ 2004
4	0.45µm	2.49µm	Rivkin+ 2004
22	0.34µm	0.93µm	Binzel+ 2004
4	0.34µm	2.44µm	Binzel+ 2004

Data

No additional attributes are available for these spectra.

SsODNet

The taxonomies by Tholen 1984 and by Mahlke+ 2022 make use of the visual albedo. classy queries the SsODNet database via rocks for values from the literature. See Berthier+ 2023 to learn more about SsODNet.

[1]

Completeness is important. If there is a public online repository of spectra you would like to see inlcuded, please suggest it and it will be added if possible.

[2]

210 spectra were published in Devogèle et al. (2019) but not all are available in the online database.