メタデータ
| 項目 |
値 |
| Designation |
C/2024 D1 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-12-03T06:05:49.574400Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T11:42:49Z |
| Obs used |
66 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-16T07:22:35.817600Z |
| Discovery magnitude (MPC) |
21.96 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-09-21.0000000 |
| e |
0.99896066 |
| q (au) |
6.696435 |
| a (au) |
6442.985621 |
| i (deg) |
132.456585 |
| Ω (om, deg) |
179.677442 |
| ω (w, deg) |
125.750357 |
| M (ma, deg) |
359.997774 |
等級
散乱 + 全体線形
$$
M_a = (3.802 + 4.676\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.802 |
| n |
4.676 |
| gf |
0.997 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.995 |
| 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) |
| 2026-06-01 00:00 |
06:18:00.29 |
+66:01:00.1 |
HIP 29737 |
15.45 |
| 2026-06-01 12:00 |
06:18:14.72 |
+66:00:02.2 |
HIP 29737 |
17.20 |
| 2026-06-02 00:00 |
06:18:29.25 |
+65:59:05.3 |
HIP 29737 |
18.95 |
| 2026-06-02 12:00 |
06:18:43.88 |
+65:58:09.5 |
HIP 29737 |
20.71 |
| 2026-06-03 00:00 |
06:18:58.59 |
+65:57:14.7 |
HIP 30125 |
21.38 |
| 2026-06-03 12:00 |
06:19:13.40 |
+65:56:20.9 |
HIP 30125 |
19.99 |
| 2026-06-04 00:00 |
06:19:28.29 |
+65:55:28.1 |
HIP 30125 |
18.67 |
| 2026-06-04 12:00 |
06:19:43.27 |
+65:54:36.3 |
HIP 30125 |
17.44 |
| 2026-06-05 00:00 |
06:19:58.34 |
+65:53:45.6 |
HIP 30125 |
16.33 |
| 2026-06-05 12:00 |
06:20:13.49 |
+65:52:55.9 |
HIP 30125 |
15.36 |
| 2026-06-06 00:00 |
06:20:28.72 |
+65:52:07.2 |
HIP 30125 |
14.55 |
| 2026-06-06 12:00 |
06:20:44.04 |
+65:51:19.5 |
HIP 30125 |
13.94 |
| 2026-06-07 00:00 |
06:20:59.44 |
+65:50:32.9 |
HIP 30125 |
13.55 |
| 2026-06-07 12:00 |
06:21:14.91 |
+65:49:47.3 |
HIP 30125 |
13.40 |
| 2026-06-08 00:00 |
06:21:30.46 |
+65:49:02.8 |
HIP 30125 |
13.51 |
| 2026-06-08 12:00 |
06:21:46.08 |
+65:48:19.2 |
HIP 30125 |
13.86 |
| 2026-06-09 00:00 |
06:22:01.78 |
+65:47:36.8 |
HIP 30125 |
14.43 |
| 2026-06-09 12:00 |
06:22:17.56 |
+65:46:55.3 |
HIP 30125 |
15.21 |
| 2026-06-10 00:00 |
06:22:33.40 |
+65:46:14.9 |
HIP 30125 |
16.16 |
| 2026-06-10 12:00 |
06:22:49.31 |
+65:45:35.5 |
HIP 30125 |
17.25 |
| 2026-06-11 00:00 |
06:23:05.29 |
+65:44:57.2 |
HIP 30125 |
18.46 |
| 2026-06-11 12:00 |
06:23:21.33 |
+65:44:19.9 |
HIP 30125 |
19.77 |
| 2026-06-12 00:00 |
06:23:37.44 |
+65:43:43.7 |
HIP 30596 |
21.01 |
| 2026-06-12 12:00 |
06:23:53.61 |
+65:43:08.5 |
HIP 30596 |
19.51 |
| 2026-06-13 00:00 |
06:24:09.84 |
+65:42:34.3 |
HIP 30596 |
18.07 |
| 2026-06-13 12:00 |
06:24:26.14 |
+65:42:01.2 |
HIP 30596 |
16.71 |
| 2026-06-14 00:00 |
06:24:42.49 |
+65:41:29.2 |
HIP 30596 |
15.44 |
| 2026-06-14 12:00 |
06:24:58.89 |
+65:40:58.2 |
HIP 30596 |
14.29 |
| 2026-06-15 00:00 |
06:25:15.35 |
+65:40:28.2 |
HIP 30596 |
13.30 |
| 2026-06-15 12:00 |
06:25:31.86 |
+65:39:59.4 |
HIP 30596 |
12.50 |
| 2026-06-16 00:00 |
06:25:48.42 |
+65:39:31.5 |
HIP 30596 |
11.92 |
| 2026-06-16 12:00 |
06:26:05.03 |
+65:39:04.8 |
HIP 30596 |
11.62 |
| 2026-06-17 00:00 |
06:26:21.69 |
+65:38:39.1 |
HIP 30596 |
11.59 |
| 2026-06-17 12:00 |
06:26:38.40 |
+65:38:14.4 |
HIP 30596 |
11.86 |
| 2026-06-18 00:00 |
06:26:55.14 |
+65:37:50.8 |
HIP 30596 |
12.39 |
| 2026-06-18 12:00 |
06:27:11.93 |
+65:37:28.3 |
HIP 30596 |
13.16 |
| 2026-06-19 00:00 |
06:27:28.76 |
+65:37:06.8 |
HIP 30596 |
14.13 |
| 2026-06-19 12:00 |
06:27:45.63 |
+65:36:46.4 |
HIP 30596 |
15.26 |
| 2026-06-20 00:00 |
06:28:02.53 |
+65:36:27.1 |
HIP 30596 |
16.52 |
| 2026-06-20 12:00 |
06:28:19.47 |
+65:36:08.8 |
HIP 30596 |
17.88 |
| 2026-06-21 00:00 |
06:28:36.45 |
+65:35:51.6 |
HIP 30596 |
19.32 |
| 2026-06-21 12:00 |
06:28:53.46 |
+65:35:35.5 |
HIP 30596 |
20.82 |
| 2026-06-22 00:00 |
06:29:10.49 |
+65:35:20.4 |
HIP 30596 |
22.38 |