メタデータ
| 項目 |
値 |
| Designation |
P/2000 R2 (LINEAR) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2000-09-12T15:47:05.478720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:05Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
19.300 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2000-09-20.0000000 |
| e |
0.58365455 |
| q (au) |
1.389967 |
| a (au) |
3.338494 |
| i (deg) |
3.216342 |
| Ω (om, deg) |
187.499425 |
| ω (w, deg) |
147.063490 |
| M (ma, deg) |
1.186343 |
等級
散乱 + 全体線形
$$
M_a = (19.097 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.097 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.987 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
03:26:09.17 |
+10:51:11.9 |
HIP 15922 |
17.49 |
| 2026-05-12 12:00 |
03:27:11.79 |
+10:54:34.3 |
HIP 15922 |
31.48 |
| 2026-05-13 00:00 |
03:28:14.33 |
+10:57:55.0 |
HIP 16250 |
17.85 |
| 2026-05-13 12:00 |
03:29:16.79 |
+11:01:14.0 |
HIP 16250 |
7.50 |
| 2026-05-14 00:00 |
03:30:19.17 |
+11:04:31.4 |
HIP 16322 |
15.72 |
| 2026-05-14 12:00 |
03:31:21.48 |
+11:07:47.0 |
HIP 16322 |
18.69 |
| 2026-05-15 00:00 |
03:32:23.70 |
+11:11:00.9 |
HIP 16525 |
17.04 |
| 2026-05-15 12:00 |
03:33:25.85 |
+11:14:13.2 |
HIP 16525 |
16.30 |
| 2026-05-16 00:00 |
03:34:27.92 |
+11:17:23.7 |
HIP 16738 |
14.10 |
| 2026-05-16 12:00 |
03:35:29.91 |
+11:20:32.5 |
HIP 16738 |
4.19 |
| 2026-05-17 00:00 |
03:36:31.82 |
+11:23:39.7 |
HIP 16738 |
17.80 |
| 2026-05-17 12:00 |
03:37:33.65 |
+11:26:45.1 |
HIP 17040 |
32.00 |
| 2026-05-18 00:00 |
03:38:35.39 |
+11:29:48.8 |
HIP 17040 |
25.92 |
| 2026-05-18 12:00 |
03:39:37.06 |
+11:32:50.8 |
HIP 17149 |
15.55 |
| 2026-05-19 00:00 |
03:40:38.64 |
+11:35:51.1 |
HIP 17149 |
9.05 |
| 2026-05-19 12:00 |
03:41:40.14 |
+11:38:49.7 |
HIP 17149 |
19.85 |
| 2026-05-20 00:00 |
03:42:41.56 |
+11:41:46.6 |
HIP 17354 |
16.06 |
| 2026-05-20 12:00 |
03:43:42.90 |
+11:44:41.8 |
HIP 17354 |
17.93 |
| 2026-05-21 00:00 |
03:44:44.15 |
+11:47:35.3 |
HIP 17496 |
7.77 |
| 2026-05-21 12:00 |
03:45:45.32 |
+11:50:27.1 |
HIP 17496 |
14.12 |
| 2026-05-22 00:00 |
03:46:46.40 |
+11:53:17.2 |
HIP 17496 |
28.31 |
| 2026-05-22 12:00 |
03:47:47.40 |
+11:56:05.6 |
HIP 17826 |
20.75 |
| 2026-05-23 00:00 |
03:48:48.32 |
+11:58:52.3 |
HIP 17826 |
16.36 |
| 2026-05-23 12:00 |
03:49:49.14 |
+12:01:37.3 |
HIP 17826 |
23.73 |
| 2026-05-24 00:00 |
03:50:49.89 |
+12:04:20.6 |
HIP 18049 |
9.07 |
| 2026-05-24 12:00 |
03:51:50.55 |
+12:07:02.2 |
HIP 18049 |
6.38 |
| 2026-05-25 00:00 |
03:52:51.12 |
+12:09:42.1 |
HIP 18117 |
14.53 |
| 2026-05-25 12:00 |
03:53:51.60 |
+12:12:20.3 |
HIP 18117 |
23.62 |
| 2026-05-26 00:00 |
03:54:52.00 |
+12:14:56.8 |
HIP 18322 |
14.37 |
| 2026-05-26 12:00 |
03:55:52.32 |
+12:17:31.7 |
HIP 18322 |
17.02 |
| 2026-05-27 00:00 |
03:56:52.54 |
+12:20:04.9 |
HIP 18443 |
20.73 |
| 2026-05-27 12:00 |
03:57:52.68 |
+12:22:36.4 |
HIP 18549 |
23.80 |
| 2026-05-28 00:00 |
03:58:52.74 |
+12:25:06.2 |
HIP 18549 |
23.89 |
| 2026-05-28 12:00 |
03:59:52.70 |
+12:27:34.3 |
HIP 18724 |
11.89 |
| 2026-05-29 00:00 |
04:00:52.58 |
+12:30:00.8 |
HIP 18724 |
2.93 |
| 2026-05-29 12:00 |
04:01:52.37 |
+12:32:25.6 |
HIP 18724 |
17.72 |
| 2026-05-30 00:00 |
04:02:52.08 |
+12:34:48.7 |
HIP 18937 |
21.45 |
| 2026-05-30 12:00 |
04:03:51.69 |
+12:37:10.2 |
HIP 19003 |
9.42 |
| 2026-05-31 00:00 |
04:04:51.22 |
+12:39:29.9 |
HIP 19003 |
12.03 |
| 2026-05-31 12:00 |
04:05:50.66 |
+12:41:48.1 |
HIP 19003 |
25.14 |
| 2026-06-01 00:00 |
04:06:50.01 |
+12:44:04.6 |
HIP 19180 |
25.47 |
| 2026-06-01 12:00 |
04:07:49.28 |
+12:46:19.4 |
HIP 19325 |
27.90 |
| 2026-06-02 00:00 |
04:08:48.45 |
+12:48:32.5 |
HIP 19325 |
28.55 |