C/2023 TD22 (Lemmon)
メタデータ
| 項目 |
値 |
| Designation |
C/2023 TD22 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-09-16T06:56:29.990400Z |
| Orbit solution date (soln_date, UTC) |
2025-10-28T16:12:33Z |
| Obs used |
594 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
9.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-08-07.0000000 |
| e |
0.95098622 |
| q (au) |
2.356803 |
| a (au) |
48.084497 |
| i (deg) |
170.489633 |
| Ω (om, deg) |
5.555928 |
| ω (w, deg) |
32.533029 |
| M (ma, deg) |
359.880907 |
等級
散乱 + 全体線形
$$
M_a = (13.564 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.564 |
| n |
2.000 |
| gf |
0.993 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
3.095 |
| 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 |
16:09:52.54 |
-14:09:16.4 |
HIP 79303 |
19.81 |
| 2026-02-03 12:00 |
16:09:50.31 |
-14:08:45.0 |
HIP 79303 |
20.04 |
| 2026-02-04 00:00 |
16:09:47.89 |
-14:08:12.9 |
HIP 79303 |
20.33 |
| 2026-02-04 12:00 |
16:09:45.30 |
-14:07:40.3 |
HIP 79303 |
20.68 |
| 2026-02-05 00:00 |
16:09:42.53 |
-14:07:06.9 |
HIP 79303 |
21.09 |
| 2026-02-05 12:00 |
16:09:39.57 |
-14:06:33.0 |
HIP 79303 |
21.57 |
| 2026-02-06 00:00 |
16:09:36.44 |
-14:05:58.4 |
HIP 79303 |
22.12 |
| 2026-02-06 12:00 |
16:09:33.12 |
-14:05:23.1 |
HIP 79303 |
22.73 |
| 2026-02-07 00:00 |
16:09:29.62 |
-14:04:47.2 |
HIP 79303 |
23.41 |
| 2026-02-07 12:00 |
16:09:25.94 |
-14:04:10.7 |
HIP 79303 |
24.16 |
| 2026-02-08 00:00 |
16:09:22.07 |
-14:03:33.5 |
HIP 79059 |
23.57 |
| 2026-02-08 12:00 |
16:09:18.01 |
-14:02:55.6 |
HIP 79059 |
22.45 |
| 2026-02-09 00:00 |
16:09:13.77 |
-14:02:17.1 |
HIP 79059 |
21.29 |
| 2026-02-09 12:00 |
16:09:09.33 |
-14:01:37.9 |
HIP 79059 |
20.09 |
| 2026-02-10 00:00 |
16:09:04.71 |
-14:00:58.1 |
HIP 79059 |
18.87 |
| 2026-02-10 12:00 |
16:08:59.90 |
-14:00:17.6 |
HIP 79059 |
17.63 |
| 2026-02-11 00:00 |
16:08:54.89 |
-13:59:36.5 |
HIP 79059 |
16.36 |
| 2026-02-11 12:00 |
16:08:49.69 |
-13:58:54.7 |
HIP 79059 |
15.09 |
| 2026-02-12 00:00 |
16:08:44.30 |
-13:58:12.2 |
HIP 79059 |
13.81 |
| 2026-02-12 12:00 |
16:08:38.71 |
-13:57:29.1 |
HIP 79059 |
12.55 |
| 2026-02-13 00:00 |
16:08:32.93 |
-13:56:45.3 |
HIP 79059 |
11.34 |
| 2026-02-13 12:00 |
16:08:26.95 |
-13:56:00.8 |
HIP 79059 |
10.19 |
| 2026-02-14 00:00 |
16:08:20.78 |
-13:55:15.7 |
HIP 79059 |
9.19 |
| 2026-02-14 12:00 |
16:08:14.41 |
-13:54:29.9 |
HIP 79059 |
8.39 |
| 2026-02-15 00:00 |
16:08:07.83 |
-13:53:43.4 |
HIP 79059 |
7.89 |
| 2026-02-15 12:00 |
16:08:01.06 |
-13:52:56.3 |
HIP 79059 |
7.79 |
| 2026-02-16 00:00 |
16:07:54.09 |
-13:52:08.5 |
HIP 79059 |
8.13 |
| 2026-02-16 12:00 |
16:07:46.91 |
-13:51:20.1 |
HIP 79059 |
8.90 |
| 2026-02-17 00:00 |
16:07:39.53 |
-13:50:30.9 |
HIP 79059 |
10.02 |
| 2026-02-17 12:00 |
16:07:31.95 |
-13:49:41.1 |
HIP 79059 |
11.42 |
| 2026-02-18 00:00 |
16:07:24.17 |
-13:48:50.6 |
HIP 79059 |
13.03 |
| 2026-02-18 12:00 |
16:07:16.18 |
-13:47:59.5 |
HIP 79059 |
14.80 |
| 2026-02-19 00:00 |
16:07:07.98 |
-13:47:07.7 |
HIP 78880 |
15.97 |
| 2026-02-19 12:00 |
16:06:59.58 |
-13:46:15.2 |
HIP 78880 |
14.53 |
| 2026-02-20 00:00 |
16:06:50.97 |
-13:45:22.0 |
HIP 78880 |
13.28 |
| 2026-02-20 12:00 |
16:06:42.16 |
-13:44:28.2 |
HIP 78880 |
12.29 |
| 2026-02-21 00:00 |
16:06:33.13 |
-13:43:33.7 |
HIP 78880 |
11.67 |
| 2026-02-21 12:00 |
16:06:23.90 |
-13:42:38.5 |
HIP 78880 |
11.51 |
| 2026-02-22 00:00 |
16:06:14.46 |
-13:41:42.6 |
HIP 78880 |
11.86 |
| 2026-02-22 12:00 |
16:06:04.81 |
-13:40:46.1 |
HIP 78880 |
12.70 |
| 2026-02-23 00:00 |
16:05:54.96 |
-13:39:48.9 |
HIP 78880 |
13.97 |
| 2026-02-23 12:00 |
16:05:44.89 |
-13:38:51.1 |
HIP 78880 |
15.60 |
| 2026-02-24 00:00 |
16:05:34.61 |
-13:37:52.6 |
HIP 78880 |
17.51 |