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) |
| 2026-09-20 00:00 |
06:54:49.22 |
+11:55:07.9 |
HIP 33240 |
3.39 |
| 2026-09-20 12:00 |
06:55:14.87 |
+11:53:17.9 |
HIP 33240 |
6.39 |
| 2026-09-21 00:00 |
06:55:40.28 |
+11:51:27.8 |
HIP 33240 |
12.42 |
| 2026-09-21 12:00 |
06:56:05.44 |
+11:49:37.4 |
HIP 33240 |
18.71 |
| 2026-09-22 00:00 |
06:56:30.35 |
+11:47:46.8 |
HIP 33465 |
15.07 |
| 2026-09-22 12:00 |
06:56:55.01 |
+11:45:55.9 |
HIP 33465 |
11.34 |
| 2026-09-23 00:00 |
06:57:19.41 |
+11:44:04.9 |
HIP 33465 |
10.48 |
| 2026-09-23 12:00 |
06:57:43.57 |
+11:42:13.7 |
HIP 33465 |
12.99 |
| 2026-09-24 00:00 |
06:58:07.46 |
+11:40:22.3 |
HIP 33561 |
17.20 |
| 2026-09-24 12:00 |
06:58:31.10 |
+11:38:30.8 |
HIP 33561 |
18.45 |
| 2026-09-25 00:00 |
06:58:54.49 |
+11:36:39.0 |
HIP 33684 |
18.20 |
| 2026-09-25 12:00 |
06:59:17.61 |
+11:34:47.2 |
HIP 33684 |
15.79 |
| 2026-09-26 00:00 |
06:59:40.48 |
+11:32:55.2 |
HIP 33684 |
15.47 |
| 2026-09-26 12:00 |
07:00:03.09 |
+11:31:03.1 |
HIP 33684 |
17.28 |
| 2026-09-27 00:00 |
07:00:25.43 |
+11:29:10.8 |
HIP 33810 |
20.43 |
| 2026-09-27 12:00 |
07:00:47.51 |
+11:27:18.5 |
HIP 33810 |
19.94 |
| 2026-09-28 00:00 |
07:01:09.33 |
+11:25:26.0 |
HIP 33810 |
21.04 |
| 2026-09-28 12:00 |
07:01:30.88 |
+11:23:33.5 |
HIP 33810 |
23.49 |
| 2026-09-29 00:00 |
07:01:52.16 |
+11:21:40.9 |
HIP 33810 |
26.87 |
| 2026-09-29 12:00 |
07:02:13.18 |
+11:19:48.2 |
HIP 33974 |
26.34 |
| 2026-09-30 00:00 |
07:02:33.93 |
+11:17:55.5 |
HIP 34033 |
26.09 |
| 2026-09-30 12:00 |
07:02:54.40 |
+11:16:02.8 |
HIP 34033 |
21.76 |
| 2026-10-01 00:00 |
07:03:14.60 |
+11:14:10.0 |
HIP 34033 |
18.00 |
| 2026-10-01 12:00 |
07:03:34.53 |
+11:12:17.1 |
HIP 34033 |
15.20 |
| 2026-10-02 00:00 |
07:03:54.18 |
+11:10:24.3 |
HIP 34033 |
13.87 |
| 2026-10-02 12:00 |
07:04:13.56 |
+11:08:31.5 |
HIP 34033 |
14.36 |
| 2026-10-03 00:00 |
07:04:32.65 |
+11:06:38.7 |
HIP 34033 |
16.44 |
| 2026-10-03 12:00 |
07:04:51.47 |
+11:04:45.9 |
HIP 34189 |
15.36 |
| 2026-10-04 00:00 |
07:05:10.00 |
+11:02:53.2 |
HIP 34231 |
14.12 |
| 2026-10-04 12:00 |
07:05:28.25 |
+11:01:00.5 |
HIP 34231 |
13.37 |
| 2026-10-05 00:00 |
07:05:46.22 |
+10:59:07.9 |
HIP 34231 |
14.32 |
| 2026-10-05 12:00 |
07:06:03.90 |
+10:57:15.3 |
HIP 34231 |
16.64 |
| 2026-10-06 00:00 |
07:06:21.29 |
+10:55:22.9 |
HIP 34231 |
19.80 |
| 2026-10-06 12:00 |
07:06:38.39 |
+10:53:30.5 |
HIP 34384 |
16.78 |
| 2026-10-07 00:00 |
07:06:55.20 |
+10:51:38.3 |
HIP 34384 |
12.64 |
| 2026-10-07 12:00 |
07:07:11.72 |
+10:49:46.2 |
HIP 34384 |
8.98 |
| 2026-10-08 00:00 |
07:07:27.94 |
+10:47:54.2 |
HIP 34384 |
6.47 |
| 2026-10-08 12:00 |
07:07:43.87 |
+10:46:02.4 |
HIP 34384 |
6.47 |
| 2026-10-09 00:00 |
07:07:59.49 |
+10:44:10.8 |
HIP 34384 |
8.88 |
| 2026-10-09 12:00 |
07:08:14.83 |
+10:42:19.3 |
HIP 34384 |
12.29 |
| 2026-10-10 00:00 |
07:08:29.86 |
+10:40:28.1 |
HIP 34450 |
15.05 |
| 2026-10-10 12:00 |
07:08:44.59 |
+10:38:37.0 |
HIP 34450 |
17.27 |
| 2026-10-11 00:00 |
07:08:59.01 |
+10:36:46.2 |
HIP 34450 |
20.05 |