479P/Elenin
メタデータ
| 項目 |
値 |
| Designation |
479P/Elenin |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-05-05T07:27:38.416320Z |
| Orbit solution date (soln_date, UTC) |
2024-08-11T00:12:26Z |
| Obs used |
990 |
| NEO |
Yes |
| M1 |
16.200 |
| K1 |
6.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-11-18T13:30:33.264000Z |
| Discovery magnitude (MPC) |
21.79 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-03-04.0000000 |
| e |
0.77856369 |
| q (au) |
1.244472 |
| a (au) |
5.619998 |
| i (deg) |
15.393352 |
| Ω (om, deg) |
295.845766 |
| ω (w, deg) |
263.493717 |
| M (ma, deg) |
328.314623 |
等級
散乱 + 全体線形
$$
M_a = (14.630 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.630 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.720 |
| k |
0.940 |
| δ90 |
1.000 |
| 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 |
| 2023-10-17 |
2024-05-04 |
+5.3514 |
-1.457 |
| 2024-05-05 |
2024-08-05 |
+10.4289 |
-2.317 |
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) |
| 2026-02-03 00:00 |
22:19:43.21 |
-00:12:50.3 |
HIP 110302 |
14.56 |
| 2026-02-03 12:00 |
22:20:03.22 |
-00:10:54.3 |
HIP 110302 |
9.54 |
| 2026-02-04 00:00 |
22:20:23.25 |
-00:08:57.8 |
HIP 110302 |
5.26 |
| 2026-02-04 12:00 |
22:20:43.28 |
-00:07:00.8 |
HIP 110302 |
4.68 |
| 2026-02-05 00:00 |
22:21:03.32 |
-00:05:03.4 |
HIP 110302 |
8.60 |
| 2026-02-05 12:00 |
22:21:23.37 |
-00:03:05.5 |
HIP 110302 |
13.56 |
| 2026-02-06 00:00 |
22:21:43.43 |
-00:01:07.3 |
HIP 110302 |
18.76 |
| 2026-02-06 12:00 |
22:22:03.50 |
+00:00:51.5 |
HIP 110302 |
24.05 |
| 2026-02-07 00:00 |
22:22:23.58 |
+00:02:50.6 |
HIP 110302 |
29.38 |
| 2026-02-07 12:00 |
22:22:43.66 |
+00:04:50.2 |
HIP 110552 |
32.29 |
| 2026-02-08 00:00 |
22:23:03.75 |
+00:06:50.2 |
HIP 110552 |
28.41 |
| 2026-02-08 12:00 |
22:23:23.85 |
+00:08:50.7 |
HIP 110552 |
25.09 |
| 2026-02-09 00:00 |
22:23:43.95 |
+00:10:51.5 |
HIP 110552 |
22.59 |
| 2026-02-09 12:00 |
22:24:04.05 |
+00:12:52.8 |
HIP 110552 |
21.20 |
| 2026-02-10 00:00 |
22:24:24.16 |
+00:14:54.4 |
HIP 110677 |
20.86 |
| 2026-02-10 12:00 |
22:24:44.27 |
+00:16:56.5 |
HIP 110677 |
19.69 |
| 2026-02-11 00:00 |
22:25:04.38 |
+00:18:59.0 |
HIP 110677 |
19.98 |
| 2026-02-11 12:00 |
22:25:24.49 |
+00:21:01.8 |
HIP 110677 |
21.67 |
| 2026-02-12 00:00 |
22:25:44.60 |
+00:23:05.1 |
HIP 110677 |
24.49 |
| 2026-02-12 12:00 |
22:26:04.72 |
+00:25:08.8 |
HIP 110856 |
27.29 |
| 2026-02-13 00:00 |
22:26:24.83 |
+00:27:12.8 |
HIP 110856 |
22.00 |
| 2026-02-13 12:00 |
22:26:44.94 |
+00:29:17.2 |
HIP 110856 |
16.78 |
| 2026-02-14 00:00 |
22:27:05.05 |
+00:31:22.0 |
HIP 110856 |
11.76 |
| 2026-02-14 12:00 |
22:27:25.16 |
+00:33:27.2 |
HIP 110856 |
7.37 |
| 2026-02-15 00:00 |
22:27:45.26 |
+00:35:32.7 |
HIP 110856 |
5.43 |
| 2026-02-15 12:00 |
22:28:05.36 |
+00:37:38.6 |
HIP 110856 |
7.99 |
| 2026-02-16 00:00 |
22:28:25.46 |
+00:39:44.9 |
HIP 110856 |
12.54 |
| 2026-02-16 12:00 |
22:28:45.55 |
+00:41:51.5 |
HIP 110856 |
17.61 |
| 2026-02-17 00:00 |
22:29:05.63 |
+00:43:58.4 |
HIP 110856 |
22.86 |
| 2026-02-17 12:00 |
22:29:25.70 |
+00:46:05.7 |
HIP 110856 |
28.18 |
| 2026-02-18 00:00 |
22:29:45.77 |
+00:48:13.4 |
HIP 110856 |
33.54 |
| 2026-02-18 12:00 |
22:30:05.83 |
+00:50:21.4 |
HIP 110856 |
38.92 |
| 2026-02-19 00:00 |
22:30:25.88 |
+00:52:29.7 |
HIP 111287 |
36.54 |
| 2026-02-19 12:00 |
22:30:45.92 |
+00:54:38.3 |
HIP 111287 |
31.09 |
| 2026-02-20 00:00 |
22:31:05.95 |
+00:56:47.2 |
HIP 111287 |
25.64 |
| 2026-02-20 12:00 |
22:31:25.97 |
+00:58:56.5 |
HIP 111287 |
20.20 |
| 2026-02-21 00:00 |
22:31:45.97 |
+01:01:06.1 |
HIP 111287 |
14.76 |
| 2026-02-21 12:00 |
22:32:05.97 |
+01:03:16.0 |
HIP 111287 |
9.32 |
| 2026-02-22 00:00 |
22:32:25.95 |
+01:05:26.2 |
HIP 111287 |
3.93 |
| 2026-02-22 12:00 |
22:32:45.91 |
+01:07:36.6 |
HIP 111287 |
1.79 |
| 2026-02-23 00:00 |
22:33:05.86 |
+01:09:47.4 |
HIP 111287 |
7.09 |
| 2026-02-23 12:00 |
22:33:25.80 |
+01:11:58.5 |
HIP 111365 |
3.86 |
| 2026-02-24 00:00 |
22:33:45.71 |
+01:14:09.8 |
HIP 111365 |
2.83 |