メタデータ
| 項目 |
値 |
| Designation |
C/2024 B2 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-10-06T00:00:41.523840Z |
| Orbit solution date (soln_date, UTC) |
2025-01-02T20:12:33Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
15.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-01-31T06:07:50.448000Z |
| Discovery magnitude (MPC) |
20.60 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-02-17.0000000 |
| e |
0.99929047 |
| q (au) |
4.076491 |
| a (au) |
5745.321334 |
| i (deg) |
99.839185 |
| Ω (om, deg) |
294.378058 |
| ω (w, deg) |
130.312850 |
| M (ma, deg) |
0.000303 |
等級
散乱 + 全体線形
$$
M_a = (18.987 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.987 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.840 |
| 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) |
| 2026-03-26 00:00 |
06:22:14.77 |
-16:49:03.9 |
HIP 30300 |
5.65 |
| 2026-03-26 12:00 |
06:22:13.25 |
-16:47:53.6 |
HIP 30300 |
4.77 |
| 2026-03-27 00:00 |
06:22:11.86 |
-16:46:43.5 |
HIP 30300 |
4.05 |
| 2026-03-27 12:00 |
06:22:10.61 |
-16:45:33.6 |
HIP 30300 |
3.58 |
| 2026-03-28 00:00 |
06:22:09.49 |
-16:44:24.0 |
HIP 30300 |
3.45 |
| 2026-03-28 12:00 |
06:22:08.51 |
-16:43:14.7 |
HIP 30300 |
3.68 |
| 2026-03-29 00:00 |
06:22:07.66 |
-16:42:05.6 |
HIP 30300 |
4.21 |
| 2026-03-29 12:00 |
06:22:06.94 |
-16:40:56.8 |
HIP 30300 |
4.94 |
| 2026-03-30 00:00 |
06:22:06.35 |
-16:39:48.4 |
HIP 30300 |
5.78 |
| 2026-03-30 12:00 |
06:22:05.90 |
-16:38:40.2 |
HIP 30300 |
6.69 |
| 2026-03-31 00:00 |
06:22:05.57 |
-16:37:32.3 |
HIP 30300 |
7.64 |
| 2026-03-31 12:00 |
06:22:05.38 |
-16:36:24.8 |
HIP 30300 |
8.62 |
| 2026-04-01 00:00 |
06:22:05.31 |
-16:35:17.6 |
HIP 30300 |
9.61 |
| 2026-04-01 12:00 |
06:22:05.38 |
-16:34:10.7 |
HIP 30300 |
10.60 |
| 2026-04-02 00:00 |
06:22:05.57 |
-16:33:04.2 |
HIP 30300 |
11.60 |
| 2026-04-02 12:00 |
06:22:05.88 |
-16:31:58.0 |
HIP 30300 |
12.61 |
| 2026-04-03 00:00 |
06:22:06.33 |
-16:30:52.2 |
HIP 30300 |
13.61 |
| 2026-04-03 12:00 |
06:22:06.90 |
-16:29:46.7 |
HIP 30300 |
14.62 |
| 2026-04-04 00:00 |
06:22:07.59 |
-16:28:41.6 |
HIP 30300 |
15.62 |
| 2026-04-04 12:00 |
06:22:08.41 |
-16:27:36.9 |
HIP 30300 |
16.62 |
| 2026-04-05 00:00 |
06:22:09.35 |
-16:26:32.6 |
HIP 30300 |
17.63 |
| 2026-04-05 12:00 |
06:22:10.42 |
-16:25:28.7 |
HIP 30300 |
18.63 |
| 2026-04-06 00:00 |
06:22:11.61 |
-16:24:25.2 |
HIP 30300 |
19.63 |
| 2026-04-06 12:00 |
06:22:12.92 |
-16:23:22.1 |
HIP 30300 |
20.62 |
| 2026-04-07 00:00 |
06:22:14.35 |
-16:22:19.5 |
HIP 30300 |
21.62 |
| 2026-04-07 12:00 |
06:22:15.91 |
-16:21:17.2 |
HIP 30414 |
21.89 |
| 2026-04-08 00:00 |
06:22:17.58 |
-16:20:15.4 |
HIP 30414 |
21.86 |
| 2026-04-08 12:00 |
06:22:19.37 |
-16:19:14.1 |
HIP 30414 |
21.85 |
| 2026-04-09 00:00 |
06:22:21.28 |
-16:18:13.2 |
HIP 30414 |
21.87 |
| 2026-04-09 12:00 |
06:22:23.31 |
-16:17:12.7 |
HIP 30414 |
21.91 |
| 2026-04-10 00:00 |
06:22:25.46 |
-16:16:12.7 |
HIP 30414 |
21.99 |
| 2026-04-10 12:00 |
06:22:27.73 |
-16:15:13.2 |
HIP 30414 |
22.09 |
| 2026-04-11 00:00 |
06:22:30.11 |
-16:14:14.2 |
HIP 30414 |
22.23 |
| 2026-04-11 12:00 |
06:22:32.60 |
-16:13:15.7 |
HIP 30414 |
22.39 |
| 2026-04-12 00:00 |
06:22:35.21 |
-16:12:17.6 |
HIP 30414 |
22.59 |
| 2026-04-12 12:00 |
06:22:37.94 |
-16:11:20.1 |
HIP 30414 |
22.82 |
| 2026-04-13 00:00 |
06:22:40.78 |
-16:10:23.1 |
HIP 30414 |
23.08 |
| 2026-04-13 12:00 |
06:22:43.73 |
-16:09:26.6 |
HIP 30414 |
23.37 |
| 2026-04-14 00:00 |
06:22:46.79 |
-16:08:30.6 |
HIP 30469 |
23.19 |
| 2026-04-14 12:00 |
06:22:49.97 |
-16:07:35.1 |
HIP 30469 |
22.67 |
| 2026-04-15 00:00 |
06:22:53.25 |
-16:06:40.2 |
HIP 30469 |
22.18 |
| 2026-04-15 12:00 |
06:22:56.65 |
-16:05:45.9 |
HIP 30469 |
21.71 |
| 2026-04-16 00:00 |
06:23:00.15 |
-16:04:52.1 |
HIP 30469 |
21.27 |