메타데이터
| 항목 |
값 |
| Designation |
P/2015 R2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-06-08T04:48:20.191680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:14Z |
| Obs used |
24 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-09-13.0000000 |
| e |
0.45202974 |
| q (au) |
2.473558 |
| a (au) |
4.514038 |
| i (deg) |
15.551673 |
| Ω (om, deg) |
168.668252 |
| ω (w, deg) |
149.648582 |
| M (ma, deg) |
9.947882 |
밝기
산란 + 전체 선형
$$
M_a = (16.425 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.425 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.548 |
| k |
1.000 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
05:21:32.73 |
+09:41:59.7 |
HIP 24971 |
9.85 |
| 2026-07-29 12:00 |
05:21:59.18 |
+09:41:24.6 |
HIP 24971 |
16.38 |
| 2026-07-30 00:00 |
05:22:25.53 |
+09:40:48.6 |
HIP 24971 |
22.90 |
| 2026-07-30 12:00 |
05:22:51.77 |
+09:40:11.9 |
HIP 25123 |
26.61 |
| 2026-07-31 00:00 |
05:23:17.91 |
+09:39:34.5 |
HIP 25123 |
27.48 |
| 2026-07-31 12:00 |
05:23:43.94 |
+09:38:56.2 |
HIP 25326 |
27.50 |
| 2026-08-01 00:00 |
05:24:09.86 |
+09:38:17.1 |
HIP 25326 |
24.11 |
| 2026-08-01 12:00 |
05:24:35.67 |
+09:37:37.3 |
HIP 25326 |
22.13 |
| 2026-08-02 00:00 |
05:25:01.37 |
+09:36:56.7 |
HIP 25326 |
21.92 |
| 2026-08-02 12:00 |
05:25:26.97 |
+09:36:15.2 |
HIP 25375 |
22.84 |
| 2026-08-03 00:00 |
05:25:52.45 |
+09:35:33.1 |
HIP 25375 |
21.99 |
| 2026-08-03 12:00 |
05:26:17.82 |
+09:34:50.1 |
HIP 25375 |
22.89 |
| 2026-08-04 00:00 |
05:26:43.08 |
+09:34:06.4 |
HIP 25578 |
19.58 |
| 2026-08-04 12:00 |
05:27:08.22 |
+09:33:21.9 |
HIP 25578 |
13.91 |
| 2026-08-05 00:00 |
05:27:33.25 |
+09:32:36.6 |
HIP 25578 |
9.06 |
| 2026-08-05 12:00 |
05:27:58.16 |
+09:31:50.5 |
HIP 25578 |
6.92 |
| 2026-08-06 00:00 |
05:28:22.96 |
+09:31:03.7 |
HIP 25666 |
8.89 |
| 2026-08-06 12:00 |
05:28:47.64 |
+09:30:16.2 |
HIP 25666 |
4.00 |
| 2026-08-07 00:00 |
05:29:12.20 |
+09:29:27.8 |
HIP 25666 |
5.28 |
| 2026-08-07 12:00 |
05:29:36.64 |
+09:28:38.7 |
HIP 25666 |
10.66 |
| 2026-08-08 00:00 |
05:30:00.96 |
+09:27:48.9 |
HIP 25666 |
16.51 |
| 2026-08-08 12:00 |
05:30:25.16 |
+09:26:58.3 |
HIP 25666 |
22.44 |
| 2026-08-09 00:00 |
05:30:49.24 |
+09:26:06.9 |
HIP 25896 |
17.91 |
| 2026-08-09 12:00 |
05:31:13.19 |
+09:25:14.8 |
HIP 25896 |
13.56 |
| 2026-08-10 00:00 |
05:31:37.02 |
+09:24:21.9 |
HIP 25896 |
10.85 |
| 2026-08-10 12:00 |
05:32:00.72 |
+09:23:28.3 |
HIP 25896 |
11.04 |
| 2026-08-11 00:00 |
05:32:24.30 |
+09:22:34.0 |
HIP 25896 |
13.97 |
| 2026-08-11 12:00 |
05:32:47.75 |
+09:21:38.9 |
HIP 25896 |
18.34 |
| 2026-08-12 00:00 |
05:33:11.07 |
+09:20:43.1 |
HIP 25972 |
21.63 |
| 2026-08-12 12:00 |
05:33:34.26 |
+09:19:46.6 |
HIP 26176 |
20.83 |
| 2026-08-13 00:00 |
05:33:57.32 |
+09:18:49.3 |
HIP 26176 |
16.59 |
| 2026-08-13 12:00 |
05:34:20.25 |
+09:17:51.3 |
HIP 26176 |
13.56 |
| 2026-08-14 00:00 |
05:34:43.05 |
+09:16:52.6 |
HIP 26176 |
12.59 |
| 2026-08-14 12:00 |
05:35:05.71 |
+09:15:53.2 |
HIP 26176 |
14.09 |
| 2026-08-15 00:00 |
05:35:28.24 |
+09:14:53.1 |
HIP 26176 |
17.39 |
| 2026-08-15 12:00 |
05:35:50.63 |
+09:13:52.3 |
HIP 26366 |
16.13 |
| 2026-08-16 00:00 |
05:36:12.89 |
+09:12:50.7 |
HIP 26366 |
11.23 |
| 2026-08-16 12:00 |
05:36:35.01 |
+09:11:48.5 |
HIP 26366 |
7.41 |
| 2026-08-17 00:00 |
05:36:56.99 |
+09:10:45.6 |
HIP 26366 |
6.76 |
| 2026-08-17 12:00 |
05:37:18.83 |
+09:09:42.0 |
HIP 26366 |
9.86 |
| 2026-08-18 00:00 |
05:37:40.53 |
+09:08:37.7 |
HIP 26414 |
12.65 |
| 2026-08-18 12:00 |
05:38:02.10 |
+09:07:32.7 |
HIP 26414 |
14.85 |
| 2026-08-19 00:00 |
05:38:23.52 |
+09:06:27.1 |
HIP 26414 |
18.40 |