メタデータ
| 項目 |
値 |
| Designation |
C/2023 TD22 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-09-16T06:57:35.680320Z |
| Orbit solution date (soln_date, UTC) |
2026-04-27T13:42:20Z |
| Obs used |
613 |
| 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) |
2024-08-15.0000000 |
| e |
0.95098531 |
| q (au) |
2.356801 |
| a (au) |
48.083568 |
| i (deg) |
170.489642 |
| Ω (om, deg) |
5.555951 |
| ω (w, deg) |
32.533345 |
| M (ma, deg) |
359.904550 |
等級
散乱 + 全体線形
$$
M_a = (13.563 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.563 |
| n |
2.000 |
| gf |
0.959 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
3.114 |
| 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) |
| 2026-07-29 00:00 |
14:16:39.18 |
-07:27:10.0 |
HIP 69758 |
1.12 |
| 2026-07-29 12:00 |
14:16:34.64 |
-07:27:27.6 |
HIP 69758 |
0.67 |
| 2026-07-30 00:00 |
14:16:30.26 |
-07:27:46.0 |
HIP 69758 |
1.49 |
| 2026-07-30 12:00 |
14:16:26.03 |
-07:28:04.9 |
HIP 69758 |
2.52 |
| 2026-07-31 00:00 |
14:16:21.96 |
-07:28:24.5 |
HIP 69758 |
3.56 |
| 2026-07-31 12:00 |
14:16:18.04 |
-07:28:44.8 |
HIP 69758 |
4.57 |
| 2026-08-01 00:00 |
14:16:14.27 |
-07:29:05.6 |
HIP 69758 |
5.55 |
| 2026-08-01 12:00 |
14:16:10.65 |
-07:29:27.1 |
HIP 69758 |
6.50 |
| 2026-08-02 00:00 |
14:16:07.18 |
-07:29:49.3 |
HIP 69758 |
7.42 |
| 2026-08-02 12:00 |
14:16:03.87 |
-07:30:12.0 |
HIP 69758 |
8.31 |
| 2026-08-03 00:00 |
14:16:00.70 |
-07:30:35.3 |
HIP 69758 |
9.17 |
| 2026-08-03 12:00 |
14:15:57.68 |
-07:30:59.3 |
HIP 69675 |
9.75 |
| 2026-08-04 00:00 |
14:15:54.81 |
-07:31:23.8 |
HIP 69675 |
9.11 |
| 2026-08-04 12:00 |
14:15:52.08 |
-07:31:49.0 |
HIP 69675 |
8.50 |
| 2026-08-05 00:00 |
14:15:49.50 |
-07:32:14.7 |
HIP 69675 |
7.92 |
| 2026-08-05 12:00 |
14:15:47.06 |
-07:32:41.0 |
HIP 69675 |
7.37 |
| 2026-08-06 00:00 |
14:15:44.77 |
-07:33:07.9 |
HIP 69675 |
6.85 |
| 2026-08-06 12:00 |
14:15:42.62 |
-07:33:35.4 |
HIP 69675 |
6.36 |
| 2026-08-07 00:00 |
14:15:40.62 |
-07:34:03.5 |
HIP 69675 |
5.91 |
| 2026-08-07 12:00 |
14:15:38.75 |
-07:34:32.1 |
HIP 69675 |
5.48 |
| 2026-08-08 00:00 |
14:15:37.03 |
-07:35:01.3 |
HIP 69675 |
5.09 |
| 2026-08-08 12:00 |
14:15:35.45 |
-07:35:31.0 |
HIP 69675 |
4.73 |
| 2026-08-09 00:00 |
14:15:34.00 |
-07:36:01.3 |
HIP 69675 |
4.42 |
| 2026-08-09 12:00 |
14:15:32.70 |
-07:36:32.2 |
HIP 69675 |
4.14 |
| 2026-08-10 00:00 |
14:15:31.53 |
-07:37:03.6 |
HIP 69675 |
3.91 |
| 2026-08-10 12:00 |
14:15:30.50 |
-07:37:35.5 |
HIP 69675 |
3.73 |
| 2026-08-11 00:00 |
14:15:29.60 |
-07:38:08.0 |
HIP 69675 |
3.60 |
| 2026-08-11 12:00 |
14:15:28.84 |
-07:38:41.0 |
HIP 69675 |
3.53 |
| 2026-08-12 00:00 |
14:15:28.22 |
-07:39:14.5 |
HIP 69675 |
3.53 |
| 2026-08-12 12:00 |
14:15:27.73 |
-07:39:48.5 |
HIP 69675 |
3.58 |
| 2026-08-13 00:00 |
14:15:27.37 |
-07:40:23.0 |
HIP 69675 |
3.69 |
| 2026-08-13 12:00 |
14:15:27.14 |
-07:40:58.1 |
HIP 69675 |
3.86 |
| 2026-08-14 00:00 |
14:15:27.04 |
-07:41:33.6 |
HIP 69675 |
4.08 |
| 2026-08-14 12:00 |
14:15:27.07 |
-07:42:09.7 |
HIP 69675 |
4.34 |
| 2026-08-15 00:00 |
14:15:27.23 |
-07:42:46.2 |
HIP 69675 |
4.65 |
| 2026-08-15 12:00 |
14:15:27.52 |
-07:43:23.2 |
HIP 69675 |
5.00 |
| 2026-08-16 00:00 |
14:15:27.93 |
-07:44:00.6 |
HIP 69675 |
5.38 |
| 2026-08-16 12:00 |
14:15:28.47 |
-07:44:38.6 |
HIP 69675 |
5.79 |
| 2026-08-17 00:00 |
14:15:29.14 |
-07:45:17.0 |
HIP 69675 |
6.23 |
| 2026-08-17 12:00 |
14:15:29.92 |
-07:45:55.9 |
HIP 69675 |
6.70 |
| 2026-08-18 00:00 |
14:15:30.83 |
-07:46:35.2 |
HIP 69675 |
7.20 |
| 2026-08-18 12:00 |
14:15:31.87 |
-07:47:14.9 |
HIP 69675 |
7.73 |
| 2026-08-19 00:00 |
14:15:33.02 |
-07:47:55.1 |
HIP 69675 |
8.28 |