메타데이터
| 항목 |
값 |
| Designation |
P/2015 Q2 (Pimentel) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-09-10T08:08:29.523840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:13Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
15.300 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-09-11.0000000 |
| e |
0.75436589 |
| q (au) |
1.819120 |
| a (au) |
7.405813 |
| i (deg) |
146.202156 |
| Ω (om, deg) |
228.244773 |
| ω (w, deg) |
244.407920 |
| M (ma, deg) |
0.032314 |
밝기
산란 + 전체 선형
$$
M_a = (15.546 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.546 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-03-26 00:00 |
11:59:41.63 |
+36:07:50.3 |
HIP 58492 |
23.70 |
| 2026-03-26 12:00 |
11:59:29.22 |
+36:08:44.6 |
HIP 58492 |
23.02 |
| 2026-03-27 00:00 |
11:59:16.81 |
+36:09:38.1 |
HIP 58492 |
22.64 |
| 2026-03-27 12:00 |
11:59:04.42 |
+36:10:30.6 |
HIP 58492 |
22.59 |
| 2026-03-28 00:00 |
11:58:52.05 |
+36:11:22.3 |
HIP 58492 |
22.85 |
| 2026-03-28 12:00 |
11:58:39.68 |
+36:12:13.1 |
HIP 58492 |
23.42 |
| 2026-03-29 00:00 |
11:58:27.33 |
+36:13:03.0 |
HIP 58492 |
24.27 |
| 2026-03-29 12:00 |
11:58:15.00 |
+36:13:52.0 |
HIP 58202 |
24.76 |
| 2026-03-30 00:00 |
11:58:02.68 |
+36:14:40.0 |
HIP 58202 |
22.26 |
| 2026-03-30 12:00 |
11:57:50.38 |
+36:15:27.2 |
HIP 58202 |
19.78 |
| 2026-03-31 00:00 |
11:57:38.10 |
+36:16:13.5 |
HIP 58202 |
17.35 |
| 2026-03-31 12:00 |
11:57:25.84 |
+36:16:58.9 |
HIP 58202 |
14.97 |
| 2026-04-01 00:00 |
11:57:13.60 |
+36:17:43.3 |
HIP 58202 |
12.67 |
| 2026-04-01 12:00 |
11:57:01.38 |
+36:18:26.9 |
HIP 58202 |
10.50 |
| 2026-04-02 00:00 |
11:56:49.19 |
+36:19:09.5 |
HIP 58202 |
8.56 |
| 2026-04-02 12:00 |
11:56:37.02 |
+36:19:51.3 |
HIP 58202 |
7.01 |
| 2026-04-03 00:00 |
11:56:24.87 |
+36:20:32.1 |
HIP 58202 |
6.16 |
| 2026-04-03 12:00 |
11:56:12.75 |
+36:21:12.0 |
HIP 58202 |
6.28 |
| 2026-04-04 00:00 |
11:56:00.66 |
+36:21:51.0 |
HIP 58202 |
7.32 |
| 2026-04-04 12:00 |
11:55:48.60 |
+36:22:29.1 |
HIP 58202 |
8.95 |
| 2026-04-05 00:00 |
11:55:36.56 |
+36:23:06.3 |
HIP 58202 |
10.90 |
| 2026-04-05 12:00 |
11:55:24.56 |
+36:23:42.6 |
HIP 58202 |
13.03 |
| 2026-04-06 00:00 |
11:55:12.59 |
+36:24:17.9 |
HIP 58202 |
15.25 |
| 2026-04-06 12:00 |
11:55:00.65 |
+36:24:52.3 |
HIP 58202 |
17.53 |
| 2026-04-07 00:00 |
11:54:48.74 |
+36:25:25.8 |
HIP 58023 |
18.30 |
| 2026-04-07 12:00 |
11:54:36.87 |
+36:25:58.4 |
HIP 58023 |
17.73 |
| 2026-04-08 00:00 |
11:54:25.03 |
+36:26:30.1 |
HIP 58023 |
17.47 |
| 2026-04-08 12:00 |
11:54:13.23 |
+36:27:00.9 |
HIP 58023 |
17.54 |
| 2026-04-09 00:00 |
11:54:01.46 |
+36:27:30.7 |
HIP 58023 |
17.93 |
| 2026-04-09 12:00 |
11:53:49.74 |
+36:27:59.6 |
HIP 57968 |
16.80 |
| 2026-04-10 00:00 |
11:53:38.05 |
+36:28:27.6 |
HIP 57968 |
15.76 |
| 2026-04-10 12:00 |
11:53:26.40 |
+36:28:54.7 |
HIP 57968 |
15.04 |
| 2026-04-11 00:00 |
11:53:14.80 |
+36:29:20.9 |
HIP 57968 |
14.70 |
| 2026-04-11 12:00 |
11:53:03.24 |
+36:29:46.2 |
HIP 57968 |
14.75 |
| 2026-04-12 00:00 |
11:52:51.72 |
+36:30:10.5 |
HIP 57968 |
15.18 |
| 2026-04-12 12:00 |
11:52:40.24 |
+36:30:33.9 |
HIP 57831 |
13.96 |
| 2026-04-13 00:00 |
11:52:28.81 |
+36:30:56.4 |
HIP 57831 |
11.68 |
| 2026-04-13 12:00 |
11:52:17.43 |
+36:31:18.0 |
HIP 57831 |
9.43 |
| 2026-04-14 00:00 |
11:52:06.09 |
+36:31:38.7 |
HIP 57831 |
7.25 |
| 2026-04-14 12:00 |
11:51:54.80 |
+36:31:58.4 |
HIP 57831 |
5.19 |
| 2026-04-15 00:00 |
11:51:43.56 |
+36:32:17.3 |
HIP 57831 |
3.45 |
| 2026-04-15 12:00 |
11:51:32.37 |
+36:32:35.2 |
HIP 57831 |
2.71 |
| 2026-04-16 00:00 |
11:51:21.23 |
+36:32:52.2 |
HIP 57831 |
3.61 |