2021年に地球へ接近した小惑星の一覧

以下は**2021年に地球へ接近した小惑星の一覧**である。

## 地球と月の距離以内に地球へ接近した小惑星
以下の地球近傍小惑星の一覧は、2021年に地球から月までの距離（）より近くまで地球に接近した小惑星である。

参考までに、地球の半径は（月と地球の距離の0.0166倍）である。静止衛星は軌道長半径が（月と地球の距離の0.110倍）の軌道を公転している。

 

 

 

 

} || align=center| 0.42 || align=center | 10–23 || align=center |27.1 || align=center | — || ·
|-
| 2021-06-12 || 2021-06-11 ||  ||  || align=center| 0.41 || align=center | 4.8–11 || align=center |28.7 || align=center | — || ·
|-
| 2021-06-13 || 2021-06-08 ||  ||  || align=center| 0.58 || align=center | 6.6–15 || align=center |28.0 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-06-15 || 2021-06-18 || 2021 MU ||  || align=center| 0.43 || align=center | 10–22 || align=center |27.1 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-06-17 || 2021-06-17 || 2021 ME ||  || align=center| 0.82 || align=center | 4.3–9.6 || align=center |29.0 || align=center | — || ·
|-
| 2021-07-03  || 2021-07-01 || 2021 NA ||  || align=center| 0.17 || align=center | 5.2–12 || align=center |28.6 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-07-08  || 2021-07-09 ||  ||  || align=center| 0.47 || align=center | 5.2–12 || align=center |28.6 || align=center | — || ·
|-
| 2021-07-20  || 2021-07-19 || 2021 OV ||  || align=center| 0.51 || align=center | 7.7–17 || align=center |27.7 || align=center | ○ || ·
|- bgcolor="#ffff99"
| 2021-07-31  || 2021-07-30 ||  ||  || align=center| 0.66 || align=center | 5.7–13 || align=center |28.3 || align=center | — || ·
|- bgcolor="#ffff99"
| 2021-08-02  || 2021-08-02 || 2021 PC ||  || align=center| 0.43 || align=center | 12–26 || align=center |26.8 || align=center | — || ·
|- bgcolor="#ffff99"
| 2021-08-02 || 2021-08-02 ||  ||  || align=center | 0.91 || align=center | 5.2–12 || align=center | 28.5 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-08-05  || 2021-08-07 ||  ||  || align=center| 0.73 || align=center | 13–29 || align=center |26.5 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-08-06  || 2021-08-08 ||  ||  || align=center| 0.62 || align=center | 6.1–14 || align=center |28.2 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-08-14  || 2021-08-15 ||  ||  || align=center| 0.17 || align=center | 7.3–16 || align=center |27.8 || align=center | — || ·
|- bgcolor="#ffff99"
| 2021-08-27  || 2021-08-27 ||  ||  || align=center| 0.80 || align=center | 4.8–11 || align=center |28.7 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-08-28  || 2021-08-30 ||  ||  || align=center| 0.33 || align=center | 2.4–5.3 || align=center |30.2 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-09-02 || 2021-09-03 ||  ||  || align=center| 0.98 || align=center | 8.1–18 || align=center |27.6 || align=center | ○ || ·
|- bgcolor="#ff9999"
| 2021-09-06 || 2021-09-08 ||  ||  || align=center| 0.69 || align=center | 6.2–14 || align=center |28.2 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-09-07 || 2021-09-08 ||  ||  || align=center| 0.50 || align=center | 4.7–11 || align=center |28.8 || align=center | ○ || ·
|-
| 2021-09-08 || 2021-09-07 ||  ||  || align=center| 0.056 || align=center | 2.3–5.1 || align=center |30.3 || align=center | — || ·
|-
| 2021-09-08 || 2021-09-07 ||  ||  || align=center| 0.31 || align=center | 2.3–5.2 || align=center |30.3 || align=center | ○ || ·
|- bgcolor="#ff9999"
| 2021-09-08 || 2021-09-09 ||  ||  || align=center| 0.36 || align=center | 5.7–13 || align=center |28.3 || align=center | — || ·
|-
| 2021-09-09 || 2021-09-05 ||  ||  || align=center| 0.49 || align=center | 3.3–7.3 || align=center |29.5 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-09-09 || 2021-09-10 ||  ||  || align=center| 0.67 || align=center | 6.6–15 || align=center |28.0 || align=center | — || ·
|-
| 2021-09-11 || 2021-09-10 ||  ||  || align=center| 0.22 || align=center | 4.4–9.8 || align=center |28.9 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-09-11 || 2021-09-12 ||  ||  || align=center| 0.84 || align=center | 3.9–8.7 || align=center |29.2 || align=center | — || ·
|-
| 2021-09-12 || 2021-09-08 ||  ||  || align=center| 0.20 || align=center | 5.6–12 || align=center |28.4 || align=center | — || ·
|-
| 2021-09-16 || 2021-09-13 ||  ||  || align=center| 0.83 || align=center | 4.3–9.6 || align=center |29.0 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-09-16 || 2021-09-17 || 2021 SG ||  || align=center| 0.64 || align=center | 42–94 || align=center |24.0 || align=center | — || ·
|- bgcolor="#ffff99"
| 2021-09-17 || 2021-09-17 || 2021 SP ||  || align=center| 0.037 || align=center | 3.7–8.3 || align=center |29.3 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-09-20 || 2021-09-23 || 2021 SQ ||  || align=center| 0.72 || align=center | 5.5–12 || align=center |28.4 || align=center | ○ || ·
|- bgcolor="#ff9999"
| 2021-09-26 || 2021-09-28 ||  ||  || align=center| 0.71 || align=center | 2.9–6.5 || align=center |29.8 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-09-27 || 2021-09-28 ||  ||  || align=center| 0.43 || align=center | 4.6–10 || align=center |28.8 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-09-30 || 2021-10-02 || 2021 TT ||  || align=center| 0.34 || align=center | 7.2–16 || align=center |27.8 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-10-01 || 2021-10-02 || 2021 TX ||  || align=center| 0.11 || align=center | 1.5–3.5 || align=center |31.2 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-10-03 || 2021-10-03 ||  ||  || align=center| 0.42 || align=center | 6.5–14 || align=center |28.1 || align=center | — || ·
|- bgcolor="#ffff99"
| 2021-10-03 || 2021-10-03 ||  ||  || align=center| 0.76 || align=center | 6.1–14 || align=center |28.2 || align=center | — ||·
|- bgcolor="#ffff99"
| 2021-10-06 || 2021-10-06 ||  ||  || align=center| 0.99 || align=center | 2.8–6.2 || align=center |29.9 || align=center | — || ·
|-
| 2021-10-10 || 2021-10-03 ||  ||  || align=center| 0.97 || align=center | 15–34 || align=center |26.2 || align=center | ○ || ·
|- bgcolor="#ff9999"
| 2021-10-11 || 2021-10-11 ||  ||  || align=center| 0.35 || align=center | 4.9–11 || align=center |28.7 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-10-11 || 2021-10-11 ||  ||  || align=center| 0.14 || align=center | 2.9–6.5 || align=center |29.8 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-10-11 || 2021-10-13 ||  ||  || align=center| 0.82 || align=center | 4.5–10 || align=center |28.8 || align=center | ○ || ·
|- bgcolor="#ff9999"
| 2021-10-12 || 2021-10-13 ||  ||  || align=center| 0.070 || align=center | 3.7–8.2 || align=center |29.3 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-10-14 || 2021-10-14 ||  ||  || align=center| 0.38 || align=center | 6.7–15 || align=center |28.0 || align=center | — || ·
|- bgcolor="#ffff99"
| 2021-10-16 || 2021-10-16 || 2021 UL ||  || align=center | 0.09 || align=center | 2.3–5.2 || align=center | 30.3 || align=center | ? || ·
|-
| 2021-10-16 || 2021-10-14 ||  ||  || align=center| 1.00 || align=center | 5.6–13 || align=center |28.4 || align=center | — || ·
|-
| 2021-10-18 || 2021-10-11 ||  ||  || align=center| 0.65 || align=center | 5.4–12 || align=center |28.5 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-10-24 || 2021-10-24 || 2021 UT ||  || align=center | 0.39 || align=center | 3.7–8.2 || align=center | 29.3 || align=center | ? || ·
|- bgcolor="#ff9999"
| 2021-10-25 || 2021-10-26 ||  ||  || align=center | 0.40 || align=center | 6.7–15 || align=center | 28.0 || align=center | ?  || ·
|- bgcolor="#ff9999"
| 2021-10-25 || 2021-10-25 ||  ||  || align=center | 0.02 || align=center | 1.2–2.6 || align=center | 31.8 || align=center | ? || ·
|- bgcolor="#ff9999"
| 2021-10-27 || 2021-10-28 ||  ||  || align=center | 0.33 || align=center | 4.7–11 || align=center | 28.8 || align=center | — || ·
|-
| 2021-10-27 || 2021-10-26 ||  ||  || align=center | 0.19 || align=center | 1.3–2.8 || align=center | 31.6 || align=center | ? || ·
|- bgcolor="#ff9999"
| 2021-10-29 || 2021-10-30 ||  ||  || align=center | 0.30 || align=center | 4.6–10 || align=center | 28.8 || align=center | — || ·
|- bgcolor="#ff9999" !!!!!!
| 2021-10-29 || 2021-10-31 ||  ||  || align=center | 0.80 || align=center | 5.8–13 || align=center | 28.3 || align=center | — || ·
|- bgcolor="#ffff99"
| 2021-10-29 || 2021-10-29 ||  ||  || align=center | 0.63 || align=center | 3.7–8.2 || align=center | 29.3 || align=center | — || ·
|-
| 2021-10-30 || 2021-10-27 ||  ||  || align=center | 0.99 || align=center | 16–35 || align=center | 26.1 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-10-30 || 2021-10-31 ||  ||  || align=center | 0.90 || align=center | 6.0–13 || align=center | 28.3 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-11-01 || 2021-11-02 || 2021 VH ||  || align=center | 0.08 || align=center | 3.2–7.1 || align=center | 29.6 || align=center | — || ·
|-
| 2021-11-04 || 2021-10-31 ||  ||  || align=center | 0.96 || align=center | 3.3–7.3 || align=center | 29.6 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-11-07 || 2021-11-11 ||  ||  || align=center | 0.79 || align=center | 2.2–4.8 || align=center | 28.7 || align=center | — || ·
|-
| 2021-11-07 || 2021-11-06 ||  ||  || align=center | 0.22 || align=center | 2.2–4.8 || align=center | 30.5 || align=center | — || ·
|- bgcolor="#ffff99"
| 2021-11-08 || 2021-11-07 ||  ||  || align=center | 0.43 || align=center | 5.5–12 || align=center | 28.4 || align=center | — || ·
|-
| 2021-11-08 || 2021-11-07 ||  ||  || align=center | 0.36 || align=center | 2.0–4.6 || align=center | 30.6 || align=center | — || ·
|-
| 2021-11-08 || 2021-11-07 ||  ||  || align=center | 0.79 || align=center | 2.9–6.5 || align=center | 29.8 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-11-09 || 2021-11-10 ||  ||  || align=center | 0.32 || align=center | 2.4–5.4 || align=center | 30.2 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-11-09 || 2021-11-09 ||  ||  || align=center | 0.15 || align=center | 1.2–2.6 || align=center | 31.8 || align=center | — || ·
|-
| 2021-11-10 || 2021-11-08 ||  ||  || align=center | 0.28 || align=center | 5.6–13 || align=center | 28.4 || align=center | — || ·
|-
| 2021-11-11 || 2021-11-10 ||  ||  || align=center | 0.83 || align=center | 3.7–8.3 || align=center | 29.3 || align=center | — || ·
|-
| 2021-11-12 || 2021-11-10 ||  ||  || align=center | 0.48 || align=center | 6.1–14 || align=center | 28.2 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-11-21 || 2021-11-24 || 2021 WP ||  || align=center | 0.41 || align=center | 6.7–15 || align=center | 28.0 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-11-26 || 2021-11-27 ||  ||  || align=center | 0.80 || align=center | 8.2–18 || align=center | 27.5 || align=center | ○ || ·
|-
| 2021-11-28 || 2021-11-27 ||  ||  || align=center | 0.53 || align=center | 5.4–12 || align=center | 28.5 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-11-30 || 2021-12-02 || 2021 XV ||  || align=center | 0.39 || align=center | 2.6–5.8 || align=center | 30.1 || align=center | — || ·
|-
| 2021-12-01 || 2021-11-29 ||  ||  || align=center | 0.37 || align=center | 3.5–7.9 || align=center | 29.4 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-12-01 || 2021-12-02 || 2021 XL ||  || align=center | 0.53 || align=center | 4.5–10 || align=center | 28.9 || align=center | — || ·
|-
| 2021-12-04 || 2021-12-02 ||  ||  || align=center | 0.80 || align=center | 3.3–7.4 || align=center | 29.5 || align=center | — || ·
|-
| 2021-12-05 || 2021-12-03 ||  ||  || align=center | 0.82 || align=center | 3.0–6.7 || align=center | 29.8 || align=center | — || ·
|- bgcolor="#ff9999"
| 2021-12-09 || 2021-12-12 ||  ||  || align=center | 0.83 || align=center | 5.8–13 || align=center | 28.3 || align=center | ○ || ·
|-
| 2021-12-09 || 2021-12-08 ||  ||  || align=center | 0.62 || align=center | 3.6–8.0 || align=center | 29.4 || align=center | ○ || ·
|-
| 2021-12-10 || 2021-12-08 ||  ||  || align=center | 0.47 || align=center | 5.2–12 || align=center | 28.6 || align=center | — || ·
|-
| 2021-12-11 || 2021-12-08 ||  ||  || align=center | 0.98 || align=center | 5.2–12 || align=center | 28.5 || align=center | — || ·
|-
| 2021-12-16 || 2021-12-12 ||  ||  || align=center | 0.54 || align=center | 6.0–13 || align=center | 28.2 || align=center | ○ || ·
|}

### サイズ別
ここでは、小惑星のサイズに応じて、上記の表にリストされている接近に対する発見の時間を視覚化する。この図のサイズは、小惑星の相対的なサイズを示している。比較のために、人のおおよそのサイズも示されている。これは、各小惑星の絶対等級、明るさに基づくサイズのおおよその尺度に基づいている。

**絶対等級30以上**
 (比較のための人のサイズ)

  
**絶対等級29-30**

  
**絶対等級28-29**

  
**絶対等級27-28**

**絶対等級26-27**

  
**絶対等級25-26**
 

**絶対等級25未満（最大）**

### 注釈

## その他の例

2021年に地球と月の距離（384,400&nbsp;kmまたは0.00256 au）よりも遠い距離を通過した、または通過する予定の地球近傍小惑星の例。

### 注釈

## 脚注