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## The Mass of the Asteroid Belt and its Different Zones

Transactions of IAA RAS, issue 33, 22–37 (2015)

Keywords: asteroid, total mass, size distribution, density, albedo

### Abstract

The mass of the main asteroid belt (1.7—3.8 a. u.) is estimated as (13.8 ± 2.0)·10-10 MSun. All available physical characteristics of asteroids were used for the calculation. Hidden mass in the asteroid belt is less than 2 % of this value. After excluding 300 largest asteroid the total mass of remained small asteroids is found to be (1.2 ± 0.8)·10-10 MSun. Mass estimations and other characteristics were obtained for 7 different zones of the asteroid belt, including the Hildas and Trojans. The total mass of the Hungaria-group is ∼ 4·10-14 MSun , zone 2.0—2.5 a. u. ∼ 1.97·10-10 MSun, zone 2.5—2.8 a. u. ∼ 7.73·10-10 MSun, zone 2.8—3.3 a. u. ∼3.55·10-10 MSun, Cybele-group ∼ 0.41·10-10 MSun, Hilda-group · 0.12·10-10MSun, Trojans ∼ 0.30·10-10MSun. For these zones the following characteristics were obtained: the mean albedo, the mean density, the number of asteroids with diameters greater than 1 km, the absolute magnitude to which all the asteroids in every zone are discovered, and the slope of the graph of the differential size distribution of the asteroids.

### Citation

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T. A. Vinogradova. The Mass of the Asteroid Belt and its Different Zones // Transactions of IAA RAS. — 2015. — Issue 33. — P. 22–37. @article{vinogradova2015, abstract = {The mass of the main asteroid belt (1.7—3.8 a. u.) is estimated as (13.8 ± 2.0)·10-10 MSun. All available physical characteristics of asteroids were used for the calculation. Hidden mass in the asteroid belt is less than 2 % of this value. After excluding 300 largest asteroid the total mass of remained small asteroids is found to be (1.2 ± 0.8)·10-10 MSun. Mass estimations and other characteristics were obtained for 7 different zones of the asteroid belt, including the Hildas and Trojans. The total mass of the Hungaria-group is ∼ 4·10-14 MSun , zone 2.0—2.5 a. u. ∼ 1.97·10-10 MSun, zone 2.5—2.8 a. u. ∼ 7.73·10-10 MSun, zone 2.8—3.3 a. u. ∼3.55·10-10 MSun, Cybele-group ∼ 0.41·10-10 MSun, Hilda-group · 0.12·10-10MSun, Trojans ∼ 0.30·10-10MSun. For these zones the following characteristics were obtained: the mean albedo, the mean density, the number of asteroids with diameters greater than 1 km, the absolute magnitude to which all the asteroids in every zone are discovered, and the slope of the graph of the differential size distribution of the asteroids.}, author = {T.~A. Vinogradova}, issue = {33}, journal = {Transactions of IAA RAS}, keyword = {asteroid, total mass, size distribution, density, albedo}, pages = {22--37}, title = {The Mass of the Asteroid Belt and its Different Zones}, url = {http://iaaras.ru/en/library/paper/1046/}, year = {2015} } TY - JOUR TI - The Mass of the Asteroid Belt and its Different Zones AU - Vinogradova, T. A. PY - 2015 T2 - Transactions of IAA RAS IS - 33 SP - 22 AB - The mass of the main asteroid belt (1.7—3.8 a. u.) is estimated as (13.8 ± 2.0)·10-10 MSun. All available physical characteristics of asteroids were used for the calculation. Hidden mass in the asteroid belt is less than 2 % of this value. After excluding 300 largest asteroid the total mass of remained small asteroids is found to be (1.2 ± 0.8)·10-10 MSun. Mass estimations and other characteristics were obtained for 7 different zones of the asteroid belt, including the Hildas and Trojans. The total mass of the Hungaria-group is ∼ 4·10-14 MSun , zone 2.0—2.5 a. u. ∼ 1.97·10-10 MSun, zone 2.5—2.8 a. u. ∼ 7.73·10-10 MSun, zone 2.8—3.3 a. u. ∼3.55·10-10 MSun, Cybele- group ∼ 0.41·10-10 MSun, Hilda-group · 0.12·10-10MSun, Trojans ∼ 0.30·10-10MSun. For these zones the following characteristics were obtained: the mean albedo, the mean density, the number of asteroids with diameters greater than 1 km, the absolute magnitude to which all the asteroids in every zone are discovered, and the slope of the graph of the differential size distribution of the asteroids. UR - http://iaaras.ru/en/library/paper/1046/ ER -