メタデータ
| 項目 |
値 |
| Designation |
C/2025 V2 (Rankin) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-03-22T23:09:30.444480Z |
| Orbit solution date (soln_date, UTC) |
2026-07-16T19:12:18Z |
| Obs used |
570 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
8.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-11-02T11:21:58.089600Z |
| Discovery magnitude (MPC) |
19.86 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) |
2026-02-08.0000000 |
| e |
1.00068099 |
| q (au) |
1.952403 |
| a (au) |
-2867.016195 |
| i (deg) |
37.284422 |
| Ω (om, deg) |
138.082210 |
| ω (w, deg) |
102.714095 |
| M (ma, deg) |
-0.002619 |
等級
散乱 + 全体線形
$$
M_a = (8.827 + 3.739\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.827 |
| n |
3.739 |
| gf |
0.989 |
| gb |
-0.951 |
| k |
1.000 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
10:19:05.54 |
+21:30:59.3 |
HIP 50444 |
31.23 |
| 2026-07-29 12:00 |
10:19:44.90 |
+21:29:17.9 |
HIP 50744 |
28.02 |
| 2026-07-30 00:00 |
10:20:24.38 |
+21:27:35.8 |
HIP 50744 |
18.69 |
| 2026-07-30 12:00 |
10:21:03.97 |
+21:25:53.2 |
HIP 50744 |
9.32 |
| 2026-07-31 00:00 |
10:21:43.68 |
+21:24:09.9 |
HIP 50744 |
0.57 |
| 2026-07-31 12:00 |
10:22:23.50 |
+21:22:26.0 |
HIP 50744 |
9.54 |
| 2026-08-01 00:00 |
10:23:03.45 |
+21:20:41.5 |
HIP 50744 |
19.00 |
| 2026-08-01 12:00 |
10:23:43.51 |
+21:18:56.4 |
HIP 50744 |
28.49 |
| 2026-08-02 00:00 |
10:24:23.69 |
+21:17:10.6 |
HIP 50744 |
38.01 |
| 2026-08-02 12:00 |
10:25:03.98 |
+21:15:24.3 |
HIP 51085 |
37.47 |
| 2026-08-03 00:00 |
10:25:44.40 |
+21:13:37.4 |
HIP 51187 |
32.51 |
| 2026-08-03 12:00 |
10:26:24.92 |
+21:11:49.8 |
HIP 51187 |
28.37 |
| 2026-08-04 00:00 |
10:27:05.57 |
+21:10:01.7 |
HIP 51187 |
27.16 |
| 2026-08-04 12:00 |
10:27:46.33 |
+21:08:13.0 |
HIP 51187 |
29.27 |
| 2026-08-05 00:00 |
10:28:27.20 |
+21:06:23.6 |
HIP 51419 |
29.51 |
| 2026-08-05 12:00 |
10:29:08.19 |
+21:04:33.7 |
HIP 51419 |
21.35 |
| 2026-08-06 00:00 |
10:29:49.30 |
+21:02:43.2 |
HIP 51419 |
15.17 |
| 2026-08-06 12:00 |
10:30:30.52 |
+21:00:52.1 |
HIP 51419 |
13.98 |
| 2026-08-07 00:00 |
10:31:11.86 |
+20:59:00.5 |
HIP 51419 |
18.81 |
| 2026-08-07 12:00 |
10:31:53.31 |
+20:57:08.2 |
HIP 51641 |
17.38 |
| 2026-08-08 00:00 |
10:32:34.88 |
+20:55:15.4 |
HIP 51641 |
7.60 |
| 2026-08-08 12:00 |
10:33:16.56 |
+20:53:22.0 |
HIP 51641 |
3.04 |
| 2026-08-09 00:00 |
10:33:58.36 |
+20:51:28.0 |
HIP 51641 |
12.57 |
| 2026-08-09 12:00 |
10:34:40.27 |
+20:49:33.5 |
HIP 51641 |
22.50 |
| 2026-08-10 00:00 |
10:35:22.29 |
+20:47:38.4 |
HIP 51964 |
24.24 |
| 2026-08-10 12:00 |
10:36:04.43 |
+20:45:42.8 |
HIP 51964 |
16.81 |
| 2026-08-11 00:00 |
10:36:46.68 |
+20:43:46.6 |
HIP 51964 |
13.37 |
| 2026-08-11 12:00 |
10:37:29.04 |
+20:41:49.9 |
HIP 51964 |
16.68 |
| 2026-08-12 00:00 |
10:38:11.52 |
+20:39:52.6 |
HIP 51964 |
24.13 |
| 2026-08-12 12:00 |
10:38:54.11 |
+20:37:54.8 |
HIP 51964 |
33.06 |
| 2026-08-13 00:00 |
10:39:36.81 |
+20:35:56.5 |
HIP 52317 |
25.51 |
| 2026-08-13 12:00 |
10:40:19.62 |
+20:33:57.6 |
HIP 52317 |
15.37 |
| 2026-08-14 00:00 |
10:41:02.54 |
+20:31:58.3 |
HIP 52317 |
5.44 |
| 2026-08-14 12:00 |
10:41:45.57 |
+20:29:58.4 |
HIP 52317 |
5.76 |
| 2026-08-15 00:00 |
10:42:28.72 |
+20:27:58.0 |
HIP 52317 |
15.77 |
| 2026-08-15 12:00 |
10:43:11.97 |
+20:25:57.1 |
HIP 52317 |
26.03 |
| 2026-08-16 00:00 |
10:43:55.33 |
+20:23:55.7 |
HIP 52551 |
21.14 |
| 2026-08-16 12:00 |
10:44:38.80 |
+20:21:53.8 |
HIP 52551 |
20.42 |
| 2026-08-17 00:00 |
10:45:22.39 |
+20:19:51.4 |
HIP 52551 |
24.56 |
| 2026-08-17 12:00 |
10:46:06.08 |
+20:17:48.5 |
HIP 52747 |
21.58 |
| 2026-08-18 00:00 |
10:46:49.88 |
+20:15:45.1 |
HIP 52747 |
19.36 |
| 2026-08-18 12:00 |
10:47:33.79 |
+20:13:41.3 |
HIP 52747 |
22.44 |
| 2026-08-19 00:00 |
10:48:17.80 |
+20:11:36.9 |
HIP 52934 |
20.63 |