メタデータ
| 項目 |
値 |
| Designation |
C/2023 S3 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-01-19T14:58:00.491520Z |
| Orbit solution date (soln_date, UTC) |
2024-08-02T01:42:20Z |
| Obs used |
692 |
| NEO |
Yes |
| M1 |
16.300 |
| K1 |
9.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-09-25T10:53:32.726400Z |
| Discovery magnitude (MPC) |
19.99 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) |
2023-12-22.0000000 |
| e |
0.97084030 |
| q (au) |
0.830157 |
| a (au) |
28.469320 |
| i (deg) |
140.498019 |
| Ω (om, deg) |
233.833529 |
| ω (w, deg) |
281.571309 |
| M (ma, deg) |
359.814278 |
等級
散乱 + 全体線形
$$
M_a = (15.227 + 4.398\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.227 |
| n |
4.398 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-09-25 |
2023-11-18 |
-4.1066 |
+1.202 |
| 2023-11-18 |
2024-01-09 |
+21.3814 |
-2.097 |
| 2024-02-11 |
2024-03-09 |
+21.5517 |
-3.253 |
| 2024-03-09 |
2024-06-02 |
+1.1889 |
-1.105 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
12:11:55.51 |
+40:55:01.7 |
HIP 59462 |
5.68 |
| 2026-05-12 12:00 |
12:11:42.56 |
+40:54:14.3 |
HIP 59462 |
4.81 |
| 2026-05-13 00:00 |
12:11:29.74 |
+40:53:25.8 |
HIP 59462 |
5.20 |
| 2026-05-13 12:00 |
12:11:17.07 |
+40:52:36.1 |
HIP 59462 |
6.59 |
| 2026-05-14 00:00 |
12:11:04.54 |
+40:51:45.2 |
HIP 59462 |
8.50 |
| 2026-05-14 12:00 |
12:10:52.16 |
+40:50:53.2 |
HIP 59462 |
10.63 |
| 2026-05-15 00:00 |
12:10:39.93 |
+40:50:00.1 |
HIP 59462 |
12.87 |
| 2026-05-15 12:00 |
12:10:27.84 |
+40:49:05.8 |
HIP 59462 |
15.16 |
| 2026-05-16 00:00 |
12:10:15.89 |
+40:48:10.5 |
HIP 59378 |
17.11 |
| 2026-05-16 12:00 |
12:10:04.10 |
+40:47:14.1 |
HIP 59212 |
18.47 |
| 2026-05-17 00:00 |
12:09:52.45 |
+40:46:16.6 |
HIP 59212 |
16.07 |
| 2026-05-17 12:00 |
12:09:40.95 |
+40:45:18.0 |
HIP 59212 |
13.69 |
| 2026-05-18 00:00 |
12:09:29.59 |
+40:44:18.4 |
HIP 59212 |
11.33 |
| 2026-05-18 12:00 |
12:09:18.39 |
+40:43:17.7 |
HIP 59212 |
8.98 |
| 2026-05-19 00:00 |
12:09:07.33 |
+40:42:16.0 |
HIP 59212 |
6.66 |
| 2026-05-19 12:00 |
12:08:56.42 |
+40:41:13.3 |
HIP 59212 |
4.35 |
| 2026-05-20 00:00 |
12:08:45.67 |
+40:40:09.6 |
HIP 59212 |
2.09 |
| 2026-05-20 12:00 |
12:08:35.06 |
+40:39:04.9 |
HIP 59212 |
0.55 |
| 2026-05-21 00:00 |
12:08:24.60 |
+40:37:59.2 |
HIP 59212 |
2.56 |
| 2026-05-21 12:00 |
12:08:14.29 |
+40:36:52.6 |
HIP 59212 |
4.79 |
| 2026-05-22 00:00 |
12:08:04.13 |
+40:35:45.0 |
HIP 59212 |
7.01 |
| 2026-05-22 12:00 |
12:07:54.12 |
+40:34:36.5 |
HIP 59212 |
9.22 |
| 2026-05-23 00:00 |
12:07:44.26 |
+40:33:27.1 |
HIP 59212 |
11.41 |
| 2026-05-23 12:00 |
12:07:34.55 |
+40:32:16.7 |
HIP 59212 |
13.59 |
| 2026-05-24 00:00 |
12:07:24.99 |
+40:31:05.5 |
HIP 59212 |
15.76 |
| 2026-05-24 12:00 |
12:07:15.58 |
+40:29:53.4 |
HIP 59212 |
17.91 |
| 2026-05-25 00:00 |
12:07:06.32 |
+40:28:40.4 |
HIP 59212 |
20.04 |
| 2026-05-25 12:00 |
12:06:57.21 |
+40:27:26.6 |
HIP 59212 |
22.16 |
| 2026-05-26 00:00 |
12:06:48.24 |
+40:26:11.9 |
HIP 58957 |
23.52 |
| 2026-05-26 12:00 |
12:06:39.43 |
+40:24:56.3 |
HIP 58957 |
21.45 |
| 2026-05-27 00:00 |
12:06:30.77 |
+40:23:40.0 |
HIP 58957 |
19.39 |
| 2026-05-27 12:00 |
12:06:22.25 |
+40:22:22.8 |
HIP 58957 |
17.34 |
| 2026-05-28 00:00 |
12:06:13.89 |
+40:21:04.9 |
HIP 58957 |
15.31 |
| 2026-05-28 12:00 |
12:06:05.67 |
+40:19:46.1 |
HIP 58957 |
13.29 |
| 2026-05-29 00:00 |
12:05:57.61 |
+40:18:26.6 |
HIP 58957 |
11.29 |
| 2026-05-29 12:00 |
12:05:49.69 |
+40:17:06.3 |
HIP 58957 |
9.31 |
| 2026-05-30 00:00 |
12:05:41.92 |
+40:15:45.3 |
HIP 58957 |
7.36 |
| 2026-05-30 12:00 |
12:05:34.30 |
+40:14:23.5 |
HIP 58957 |
5.44 |
| 2026-05-31 00:00 |
12:05:26.82 |
+40:13:01.0 |
HIP 58957 |
3.60 |
| 2026-05-31 12:00 |
12:05:19.50 |
+40:11:37.8 |
HIP 58957 |
2.05 |
| 2026-06-01 00:00 |
12:05:12.32 |
+40:10:13.9 |
HIP 58957 |
1.74 |
| 2026-06-01 12:00 |
12:05:05.29 |
+40:08:49.2 |
HIP 58957 |
3.07 |
| 2026-06-02 00:00 |
12:04:58.40 |
+40:07:23.9 |
HIP 58957 |
4.82 |