메타데이터
| 항목 |
값 |
| Designation |
C/2020 PV6 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-09-25T23:59:11.313600Z |
| Orbit solution date (soln_date, UTC) |
2024-07-30T14:57:24Z |
| Obs used |
1749 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
17.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-09-30.0000000 |
| e |
0.94495091 |
| q (au) |
2.295631 |
| a (au) |
41.701535 |
| i (deg) |
128.239287 |
| Ω (om, deg) |
329.143872 |
| ω (w, deg) |
71.380642 |
| M (ma, deg) |
0.014642 |
밝기
산란 + 전체 선형
$$
M_a = (6.667 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.667 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2021-05-30 |
2021-09-22 |
+4.0425 |
-1.521 |
| 2021-09-26 |
2022-05-23 |
+13.2958 |
-5.599 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
08:25:42.59 |
-01:36:10.2 |
HIP 41166 |
27.32 |
| 2026-03-26 12:00 |
08:25:36.79 |
-01:35:22.6 |
HIP 41166 |
25.73 |
| 2026-03-27 00:00 |
08:25:31.06 |
-01:34:35.1 |
HIP 41166 |
24.17 |
| 2026-03-27 12:00 |
08:25:25.42 |
-01:33:47.8 |
HIP 41166 |
22.64 |
| 2026-03-28 00:00 |
08:25:19.86 |
-01:33:00.5 |
HIP 41166 |
21.14 |
| 2026-03-28 12:00 |
08:25:14.38 |
-01:32:13.4 |
HIP 41166 |
19.68 |
| 2026-03-29 00:00 |
08:25:08.98 |
-01:31:26.3 |
HIP 41166 |
18.26 |
| 2026-03-29 12:00 |
08:25:03.66 |
-01:30:39.4 |
HIP 41166 |
16.88 |
| 2026-03-30 00:00 |
08:24:58.42 |
-01:29:52.7 |
HIP 41166 |
15.55 |
| 2026-03-30 12:00 |
08:24:53.26 |
-01:29:06.1 |
HIP 41166 |
14.28 |
| 2026-03-31 00:00 |
08:24:48.19 |
-01:28:19.6 |
HIP 41166 |
13.09 |
| 2026-03-31 12:00 |
08:24:43.19 |
-01:27:33.3 |
HIP 41166 |
11.97 |
| 2026-04-01 00:00 |
08:24:38.28 |
-01:26:47.1 |
HIP 41166 |
10.96 |
| 2026-04-01 12:00 |
08:24:33.45 |
-01:26:01.0 |
HIP 41166 |
10.08 |
| 2026-04-02 00:00 |
08:24:28.70 |
-01:25:15.2 |
HIP 41166 |
9.35 |
| 2026-04-02 12:00 |
08:24:24.03 |
-01:24:29.4 |
HIP 41166 |
8.80 |
| 2026-04-03 00:00 |
08:24:19.44 |
-01:23:43.9 |
HIP 41166 |
8.46 |
| 2026-04-03 12:00 |
08:24:14.94 |
-01:22:58.5 |
HIP 41166 |
8.34 |
| 2026-04-04 00:00 |
08:24:10.51 |
-01:22:13.3 |
HIP 41166 |
8.45 |
| 2026-04-04 12:00 |
08:24:06.17 |
-01:21:28.3 |
HIP 41166 |
8.77 |
| 2026-04-05 00:00 |
08:24:01.91 |
-01:20:43.4 |
HIP 41166 |
9.26 |
| 2026-04-05 12:00 |
08:23:57.73 |
-01:19:58.8 |
HIP 41166 |
9.91 |
| 2026-04-06 00:00 |
08:23:53.63 |
-01:19:14.3 |
HIP 41166 |
10.66 |
| 2026-04-06 12:00 |
08:23:49.62 |
-01:18:30.0 |
HIP 41166 |
11.50 |
| 2026-04-07 00:00 |
08:23:45.69 |
-01:17:45.9 |
HIP 41166 |
12.39 |
| 2026-04-07 12:00 |
08:23:41.84 |
-01:17:02.0 |
HIP 41166 |
13.34 |
| 2026-04-08 00:00 |
08:23:38.07 |
-01:16:18.3 |
HIP 41166 |
14.31 |
| 2026-04-08 12:00 |
08:23:34.38 |
-01:15:34.9 |
HIP 41166 |
15.30 |
| 2026-04-09 00:00 |
08:23:30.78 |
-01:14:51.6 |
HIP 41166 |
16.31 |
| 2026-04-09 12:00 |
08:23:27.25 |
-01:14:08.6 |
HIP 41209 |
17.31 |
| 2026-04-10 00:00 |
08:23:23.81 |
-01:13:25.7 |
HIP 41209 |
17.93 |
| 2026-04-10 12:00 |
08:23:20.45 |
-01:12:43.1 |
HIP 41209 |
18.59 |
| 2026-04-11 00:00 |
08:23:17.18 |
-01:12:00.7 |
HIP 41209 |
19.26 |
| 2026-04-11 12:00 |
08:23:13.98 |
-01:11:18.6 |
HIP 41209 |
19.95 |
| 2026-04-12 00:00 |
08:23:10.87 |
-01:10:36.7 |
HIP 41068 |
19.46 |
| 2026-04-12 12:00 |
08:23:07.84 |
-01:09:55.0 |
HIP 41068 |
18.58 |
| 2026-04-13 00:00 |
08:23:04.89 |
-01:09:13.6 |
HIP 41068 |
17.72 |
| 2026-04-13 12:00 |
08:23:02.02 |
-01:08:32.4 |
HIP 41068 |
16.88 |
| 2026-04-14 00:00 |
08:22:59.24 |
-01:07:51.5 |
HIP 41068 |
16.08 |
| 2026-04-14 12:00 |
08:22:56.53 |
-01:07:10.8 |
HIP 41068 |
15.30 |
| 2026-04-15 00:00 |
08:22:53.91 |
-01:06:30.4 |
HIP 41068 |
14.54 |
| 2026-04-15 12:00 |
08:22:51.37 |
-01:05:50.2 |
HIP 41068 |
13.82 |
| 2026-04-16 00:00 |
08:22:48.91 |
-01:05:10.3 |
HIP 41068 |
13.12 |