J/A+A/701/A231 Small bodies NIR multiwaves phase curves (Alvarez-Candal+, 2025)
A catalog of near-IR absolute magnitudes of Solar System small bodies.
Alvarez-Candal A., Rizos J.L., Colazo M., Duffard R., Morate D., Carruba V.,
Camargo I.B.J., Gomez-Toribio A.
<Astron. Astrophys. 701, A231 (2025)>
=2025A&A...701A.231A 2025A&A...701A.231A (SIMBAD/NED BibCode)
ADC_Keywords: Minor planets ; Photometry, infrared ; Magnitudes, absolute
Keywords: methods: data analysis - catalogs - minor planets, asteroids: general
Abstract:
Phase curves of small bodies are useful tools to obtain their absolute
magnitudes and phase coefficients. The former relates to the
object's apparent brightness, while the latter relates to how the
light interacts with the surface. Data from multi-wavelength
photometric surveys, which usually serendipitously observe small
bodies, are becoming the cornerstone of large statistical studies of
the Solar System. Nevertheless, to our knowledge, all studies have
been carried out in visible wavelengths.
We aim to provide the first catalog of absolute magnitudes in
near-infrared filters (Y, J, H, and K). We will study the
applicability of a non-linear model to these data and compare it with
a simple linear model.
We compute the absolute magnitudes using two photometric models: the
HG12 and the linear model. We employ a combination of Bayesian
inference and Monte Carlo sampling to calculate the probability
distributions of the absolute magnitudes and their corresponding phase
coefficients. We use the combination of four near-infrared photometric
catalogs to create our input database.
We produced the first catalog of near-infrared magnitudes. We obtained
absolute magnitudes for over 10000 objects (with at least one
absolute magnitude measured), with about 180 objects having four
absolute magnitudes. We confirmed that a linear model that fits the
phase curves produces accurate results. Since a linear behavior well
describes the curves, fitting to a restricted phase angle range (in
particular, larger than 9.5°) does not substantially affect the
results. Finally, we also detect a phase-coloring effect in the
near-infrared, as observed in visible wavelengths for asteroids and
trans-Neptunian objects.
Description:
Phase curves parameters for >10k minor bodies in the YJHK systems
obtained combining four NIR catalogs. For each objects are given the
absolute magnitudes and phase coefficients, their respective
uncertainty intervals, and the minimum phase angle and total span in
phase angle. Two denominations are provided: the MPC ASCII code and
the catalog name. Results obtained using the HG12* photometric model
(Penttila et al, 2016P&SS..123..117P 2016P&SS..123..117P), a linear model, and a linear
model with restricted phase angle coverage.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
nir-hg12.dat 248 19139 Absolute magnitudes and phase coefficients
using the HG12 model (table 2)
nir-hb.dat 272 19041 Absolute magnitudes and phase coefficients
using a linear model (table 2)
nir-hbr.dat 272 18971 Absolute magnitudes and phase coefficients
using a linear model and restricted alpha
(table 2)
--------------------------------------------------------------------------------
See also:
B/astorb : Orbits of Minor Planets (Bowell+, 2014-)
Byte-by-byte Description of file: nir-hg12.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- MPC Minor Planets Center designation ASCII code
10- 25 A16 --- Object Minor Planets Center designation Catalog name
28- 33 F6.3 mag HY Absolute magnitude in the Y filter
36- 41 F6.3 mag B_HY Absolute magnitude in the Y filter at 84%
44- 49 F6.3 mag b_HY Absolute magnitude in the Y filter at 16%
51- 52 I2 --- NY Number of observation in the Y filter
55- 60 F6.3 mag HJ Absolute magnitude in the J filter
63- 68 F6.3 mag B_HJ Absolute magnitude in the J filter at 84%
71- 76 F6.3 mag b_HJ Absolute magnitude in the J filter at 16%
78- 80 I3 --- NJ Number of observation in the J filter
83- 88 F6.3 mag HH Absolute magnitude in the H filter
91- 96 F6.3 mag B_HH Absolute magnitude in the H filter at 84%
99-104 F6.3 mag b_HH Absolute magnitude in the H filter at 16%
106-108 I3 --- NH Number of observation in the H filter
111-116 F6.3 mag HK Absolute magnitude in the K filter
119-124 F6.3 mag B_HK Absolute magnitude in the K filter at 84%
127-132 F6.3 mag b_HK Absolute magnitude in the K filter at 16%
134-136 I3 --- NK Number of observation in the K filter
139-144 F6.3 --- GY Phase coefficient in the Y filter
147-152 F6.3 --- b_GY Phase coefficient in the Y filter at 16%
155-160 F6.3 --- B_GY Phase coefficient in the Y filter at 84%
163-168 F6.3 --- GJ Phase coefficient in the J filter
171-176 F6.3 --- b_GJ Phase coefficient in the J filter at 16%
179-184 F6.3 --- B_GJ Phase coefficient in the J filter at 84%
187-192 F6.3 --- GH Phase coefficient in the H filter
195-200 F6.3 --- b_GH Phase coefficient in the H filter at 16%
203-208 F6.3 --- B_GH Phase coefficient in the H filter at 84%
211-216 F6.3 --- GK Phase coefficient in the K filter
219-224 F6.3 --- b_GK Phase coefficient in the K filter at 16%
227-232 F6.3 --- B_GK Phase coefficient in the K filter at 84%
234-240 F7.4 deg am Minimum phase angle
242-248 F7.4 deg Da Range of phase angle covered
--------------------------------------------------------------------------------
Byte-by-byte Description of file: nir-hb.dat nir-hbr.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- MPC Minor Planets Center designation ASCII code
10- 25 A16 --- Object Minor Planets Center designation Catalog name
27- 34 F8.3 mag HY Absolute magnitude in the Y filter
36- 43 F8.3 mag B_HY Absolute magnitude in the Y filter at 84%
45- 52 F8.3 mag b_HY Absolute magnitude in the Y filter at 16%
54- 55 I2 --- NY Number of observation in the Y filter
57- 64 F8.3 mag HJ Absolute magnitude in the J filter
65- 73 F9.3 mag B_HJ Absolute magnitude in the J filter at 84%
75- 82 F8.3 mag b_HJ Absolute magnitude in the J filter at 16%
84- 86 I3 --- NJ Number of observation in the J filter
88- 95 F8.3 mag HH Absolute magnitude in the H filter
96-104 F9.3 mag B_HH Absolute magnitude in the H filter at 84%
106-113 F8.3 mag b_HH Absolute magnitude in the H filter at 16%
115-117 I3 --- NH Number of observation in the H filter
119-126 F8.3 mag HK Absolute magnitude in the K filter
127-135 F9.3 mag B_HK Absolute magnitude in the K filter at 84%
137-144 F8.3 mag b_HK Absolute magnitude in the K filter at 16%
146-148 I3 --- NK Number of observation in the K filter
150-157 F8.3 --- bY Phase coefficient in the Y filter
159-166 F8.3 --- b_bY Phase coefficient in the Y filter at 16%
168-175 F8.3 --- B_bY Phase coefficient in the Y filter at 84%
177-184 F8.3 --- bJ Phase coefficient in the J filter
186-193 F8.3 --- b_bJ Phase coefficient in the J filter at 16%
195-202 F8.3 --- B_bJ Phase coefficient in the J filter at 84%
204-211 F8.3 --- bH Phase coefficient in the H filter
213-220 F8.3 --- b_bH Phase coefficient in the H filter at 16%
222-229 F8.3 --- B_bH Phase coefficient in the H filter at 84%
231-238 F8.3 --- bK Phase coefficient in the K filter
240-247 F8.3 --- b_bK Phase coefficient in the K filter at 16%
249-256 F8.3 --- B_bK Phase coefficient in the K filter at 84%
258-264 F7.4 deg am Minimum phase angle
266-272 F7.4 deg Da Range of phase angle covered
--------------------------------------------------------------------------------
Acknowledgements:
Alvaro Alvarez-Candal, varobes(at)gmail.com
References:
Penttila et al., 2016P&SS..123..117P 2016P&SS..123..117P,
H, G1, G2 photometric phase function extended to low-accuracy data
(End) Alvaro Alvarez-Candal [IAA, Spain], Patricia Vannier [CDS] 31-Jul-2025