메타데이터
| 항목 |
값 |
| Designation |
P/2017 B4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-01-28T02:53:29.515200Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:32Z |
| Obs used |
124 |
| NEO |
- |
| M1 |
15.000 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-09-01.0000000 |
| e |
0.36178487 |
| q (au) |
2.796849 |
| a (au) |
4.382297 |
| i (deg) |
20.447212 |
| Ω (om, deg) |
120.712150 |
| ω (w, deg) |
16.557333 |
| M (ma, deg) |
101.621855 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
10:04:23.83 |
+30:54:24.3 |
HIP 49441 |
19.33 |
| 2026-03-26 12:00 |
10:04:17.98 |
+30:55:19.3 |
HIP 49441 |
19.91 |
| 2026-03-27 00:00 |
10:04:12.45 |
+30:56:10.7 |
HIP 49441 |
20.56 |
| 2026-03-27 12:00 |
10:04:07.26 |
+30:56:58.8 |
HIP 49441 |
21.24 |
| 2026-03-28 00:00 |
10:04:02.39 |
+30:57:43.4 |
HIP 49441 |
21.93 |
| 2026-03-28 12:00 |
10:03:57.86 |
+30:58:24.7 |
HIP 49441 |
22.63 |
| 2026-03-29 00:00 |
10:03:53.67 |
+30:59:02.5 |
HIP 49441 |
23.31 |
| 2026-03-29 12:00 |
10:03:49.81 |
+30:59:37.1 |
HIP 49441 |
23.97 |
| 2026-03-30 00:00 |
10:03:46.28 |
+31:00:08.3 |
HIP 49441 |
24.59 |
| 2026-03-30 12:00 |
10:03:43.09 |
+31:00:36.3 |
HIP 49441 |
25.17 |
| 2026-03-31 00:00 |
10:03:40.23 |
+31:01:01.0 |
HIP 49441 |
25.70 |
| 2026-03-31 12:00 |
10:03:37.72 |
+31:01:22.4 |
HIP 49441 |
26.18 |
| 2026-04-01 00:00 |
10:03:35.54 |
+31:01:40.7 |
HIP 49441 |
26.59 |
| 2026-04-01 12:00 |
10:03:33.70 |
+31:01:55.7 |
HIP 49441 |
26.95 |
| 2026-04-02 00:00 |
10:03:32.20 |
+31:02:07.6 |
HIP 49441 |
27.25 |
| 2026-04-02 12:00 |
10:03:31.03 |
+31:02:16.4 |
HIP 49441 |
27.48 |
| 2026-04-03 00:00 |
10:03:30.21 |
+31:02:22.0 |
HIP 49441 |
27.64 |
| 2026-04-03 12:00 |
10:03:29.73 |
+31:02:24.5 |
HIP 49441 |
27.74 |
| 2026-04-04 00:00 |
10:03:29.58 |
+31:02:24.0 |
HIP 49441 |
27.77 |
| 2026-04-04 12:00 |
10:03:29.78 |
+31:02:20.5 |
HIP 49441 |
27.74 |
| 2026-04-05 00:00 |
10:03:30.31 |
+31:02:13.9 |
HIP 49441 |
27.64 |
| 2026-04-05 12:00 |
10:03:31.19 |
+31:02:04.3 |
HIP 49441 |
27.47 |
| 2026-04-06 00:00 |
10:03:32.40 |
+31:01:51.8 |
HIP 49441 |
27.24 |
| 2026-04-06 12:00 |
10:03:33.96 |
+31:01:36.3 |
HIP 49441 |
26.94 |
| 2026-04-07 00:00 |
10:03:35.85 |
+31:01:17.9 |
HIP 49441 |
26.58 |
| 2026-04-07 12:00 |
10:03:38.09 |
+31:00:56.6 |
HIP 49441 |
26.16 |
| 2026-04-08 00:00 |
10:03:40.66 |
+31:00:32.4 |
HIP 49441 |
25.69 |
| 2026-04-08 12:00 |
10:03:43.57 |
+31:00:05.4 |
HIP 49441 |
25.17 |
| 2026-04-09 00:00 |
10:03:46.82 |
+30:59:35.5 |
HIP 49441 |
24.60 |
| 2026-04-09 12:00 |
10:03:50.41 |
+30:59:02.8 |
HIP 49441 |
23.98 |
| 2026-04-10 00:00 |
10:03:54.34 |
+30:58:27.4 |
HIP 49441 |
23.34 |
| 2026-04-10 12:00 |
10:03:58.60 |
+30:57:49.2 |
HIP 49441 |
22.67 |
| 2026-04-11 00:00 |
10:04:03.20 |
+30:57:08.3 |
HIP 49441 |
21.98 |
| 2026-04-11 12:00 |
10:04:08.14 |
+30:56:24.6 |
HIP 49441 |
21.29 |
| 2026-04-12 00:00 |
10:04:13.41 |
+30:55:38.3 |
HIP 49441 |
20.62 |
| 2026-04-12 12:00 |
10:04:19.02 |
+30:54:49.3 |
HIP 49441 |
19.98 |
| 2026-04-13 00:00 |
10:04:24.96 |
+30:53:57.7 |
HIP 49441 |
19.39 |
| 2026-04-13 12:00 |
10:04:31.23 |
+30:53:03.4 |
HIP 49441 |
18.88 |
| 2026-04-14 00:00 |
10:04:37.84 |
+30:52:06.6 |
HIP 49441 |
18.48 |
| 2026-04-14 12:00 |
10:04:44.78 |
+30:51:07.1 |
HIP 49441 |
18.22 |
| 2026-04-15 00:00 |
10:04:52.05 |
+30:50:05.2 |
HIP 49441 |
18.13 |
| 2026-04-15 12:00 |
10:04:59.65 |
+30:49:00.7 |
HIP 49441 |
18.24 |
| 2026-04-16 00:00 |
10:05:07.57 |
+30:47:53.7 |
HIP 49441 |
18.56 |