P/2015 TO19 (Lemmon-PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
P/2015 TO19 (Lemmon-PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-11-23T20:00:22.893120Z |
| Orbit solution date (soln_date, UTC) |
2026-01-13T08:12:19Z |
| Obs used |
172 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
22.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-04-07.0000000 |
| e |
0.35892582 |
| q (au) |
2.919363 |
| a (au) |
4.553861 |
| i (deg) |
6.499856 |
| Ω (om, deg) |
321.643636 |
| ω (w, deg) |
89.130064 |
| M (ma, deg) |
225.429177 |
等級
散乱 + 全体線形
$$
M_a = (18.714 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.714 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.769 |
| k |
0.800 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
02:53:07.50 |
+23:40:25.9 |
HIP 13547 |
21.06 |
| 2026-02-03 12:00 |
02:53:35.44 |
+23:41:04.7 |
HIP 13547 |
15.40 |
| 2026-02-04 00:00 |
02:54:03.63 |
+23:41:44.5 |
HIP 13547 |
10.61 |
| 2026-02-04 12:00 |
02:54:32.06 |
+23:42:25.4 |
HIP 13547 |
8.47 |
| 2026-02-05 00:00 |
02:55:00.73 |
+23:43:07.3 |
HIP 13547 |
10.82 |
| 2026-02-05 12:00 |
02:55:29.64 |
+23:43:50.2 |
HIP 13547 |
15.84 |
| 2026-02-06 00:00 |
02:55:58.79 |
+23:44:34.1 |
HIP 13547 |
21.79 |
| 2026-02-06 12:00 |
02:56:28.17 |
+23:45:19.0 |
HIP 13801 |
21.11 |
| 2026-02-07 00:00 |
02:56:57.78 |
+23:46:04.9 |
HIP 13801 |
15.56 |
| 2026-02-07 12:00 |
02:57:27.63 |
+23:46:51.7 |
HIP 13801 |
11.43 |
| 2026-02-08 00:00 |
02:57:57.71 |
+23:47:39.5 |
HIP 13801 |
10.66 |
| 2026-02-08 12:00 |
02:58:28.02 |
+23:48:28.2 |
HIP 13801 |
13.90 |
| 2026-02-09 00:00 |
02:58:58.56 |
+23:49:17.8 |
HIP 13801 |
19.28 |
| 2026-02-09 12:00 |
02:59:29.33 |
+23:50:08.4 |
HIP 13867 |
21.64 |
| 2026-02-10 00:00 |
03:00:00.32 |
+23:50:59.8 |
HIP 13867 |
25.71 |
| 2026-02-10 12:00 |
03:00:31.53 |
+23:51:52.1 |
HIP 13867 |
30.94 |
| 2026-02-11 00:00 |
03:01:02.97 |
+23:52:45.3 |
HIP 14129 |
31.55 |
| 2026-02-11 12:00 |
03:01:34.62 |
+23:53:39.3 |
HIP 14129 |
29.38 |
| 2026-02-12 00:00 |
03:02:06.50 |
+23:54:34.2 |
HIP 14129 |
28.95 |
| 2026-02-12 12:00 |
03:02:38.59 |
+23:55:29.9 |
HIP 14129 |
30.38 |
| 2026-02-13 00:00 |
03:03:10.90 |
+23:56:26.5 |
HIP 14129 |
33.46 |
| 2026-02-13 12:00 |
03:03:43.43 |
+23:57:23.8 |
HIP 14129 |
37.81 |
| 2026-02-14 00:00 |
03:04:16.16 |
+23:58:21.9 |
HIP 14451 |
34.55 |
| 2026-02-14 12:00 |
03:04:49.11 |
+23:59:20.8 |
HIP 14451 |
27.44 |
| 2026-02-15 00:00 |
03:05:22.27 |
+24:00:20.5 |
HIP 14451 |
20.64 |
| 2026-02-15 12:00 |
03:05:55.64 |
+24:01:20.9 |
HIP 14451 |
14.63 |
| 2026-02-16 00:00 |
03:06:29.22 |
+24:02:22.0 |
HIP 14451 |
10.95 |
| 2026-02-16 12:00 |
03:07:03.00 |
+24:03:23.9 |
HIP 14451 |
12.06 |
| 2026-02-17 00:00 |
03:07:36.99 |
+24:04:26.5 |
HIP 14451 |
17.12 |
| 2026-02-17 12:00 |
03:08:11.18 |
+24:05:29.8 |
HIP 14451 |
23.77 |
| 2026-02-18 00:00 |
03:08:45.57 |
+24:06:33.7 |
HIP 14554 |
28.07 |
| 2026-02-18 12:00 |
03:09:20.16 |
+24:07:38.4 |
HIP 14554 |
33.15 |
| 2026-02-19 00:00 |
03:09:54.95 |
+24:08:43.7 |
HIP 14847 |
26.72 |
| 2026-02-19 12:00 |
03:10:29.93 |
+24:09:49.6 |
HIP 14847 |
20.02 |
| 2026-02-20 00:00 |
03:11:05.11 |
+24:10:56.1 |
HIP 14847 |
14.74 |
| 2026-02-20 12:00 |
03:11:40.48 |
+24:12:03.3 |
HIP 14847 |
12.86 |
| 2026-02-21 00:00 |
03:12:16.05 |
+24:13:11.0 |
HIP 14847 |
15.72 |
| 2026-02-21 12:00 |
03:12:51.80 |
+24:14:19.4 |
HIP 15057 |
15.94 |
| 2026-02-22 00:00 |
03:13:27.74 |
+24:15:28.3 |
HIP 15057 |
7.68 |
| 2026-02-22 12:00 |
03:14:03.87 |
+24:16:37.8 |
HIP 15057 |
0.91 |
| 2026-02-23 00:00 |
03:14:40.19 |
+24:17:47.8 |
HIP 15057 |
9.04 |
| 2026-02-23 12:00 |
03:15:16.68 |
+24:18:58.3 |
HIP 15181 |
14.63 |
| 2026-02-24 00:00 |
03:15:53.36 |
+24:20:09.3 |
HIP 15181 |
12.83 |