메타데이터
| 항목 |
값 |
| Designation |
C/2013 W2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-01-05T06:10:39.014400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:43Z |
| Obs used |
179 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
13.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-01-20.0000000 |
| e |
0.57470690 |
| q (au) |
4.444439 |
| a (au) |
10.450297 |
| i (deg) |
4.567063 |
| Ω (om, deg) |
179.842795 |
| ω (w, deg) |
307.197933 |
| M (ma, deg) |
0.430116 |
밝기
산란 + 전체 선형
$$
M_a = (5.108 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.108 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.507 |
| 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 |
| 2013-11-27 |
2014-10-24 |
+27.9138 |
-19.052 |
| 2015-01-17 |
2016-05-05 |
+3.0612 |
-2.167 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
19:24:02.82 |
-17:08:08.6 |
HIP 95343 |
4.90 |
| 2026-06-01 12:00 |
19:23:57.56 |
-17:08:13.1 |
HIP 95343 |
4.08 |
| 2026-06-02 00:00 |
19:23:52.24 |
-17:08:17.9 |
HIP 95343 |
3.54 |
| 2026-06-02 12:00 |
19:23:46.88 |
-17:08:22.8 |
HIP 95343 |
3.40 |
| 2026-06-03 00:00 |
19:23:41.46 |
-17:08:27.8 |
HIP 95343 |
3.73 |
| 2026-06-03 12:00 |
19:23:35.99 |
-17:08:33.1 |
HIP 95343 |
4.44 |
| 2026-06-04 00:00 |
19:23:30.47 |
-17:08:38.4 |
HIP 95343 |
5.39 |
| 2026-06-04 12:00 |
19:23:24.91 |
-17:08:44.0 |
HIP 95343 |
6.48 |
| 2026-06-05 00:00 |
19:23:19.30 |
-17:08:49.7 |
HIP 95343 |
7.66 |
| 2026-06-05 12:00 |
19:23:13.64 |
-17:08:55.6 |
HIP 95343 |
8.89 |
| 2026-06-06 00:00 |
19:23:07.93 |
-17:09:01.6 |
HIP 95343 |
10.17 |
| 2026-06-06 12:00 |
19:23:02.17 |
-17:09:07.8 |
HIP 95343 |
11.47 |
| 2026-06-07 00:00 |
19:22:56.37 |
-17:09:14.1 |
HIP 95343 |
12.80 |
| 2026-06-07 12:00 |
19:22:50.52 |
-17:09:20.6 |
HIP 95343 |
14.16 |
| 2026-06-08 00:00 |
19:22:44.63 |
-17:09:27.3 |
HIP 95343 |
15.53 |
| 2026-06-08 12:00 |
19:22:38.69 |
-17:09:34.1 |
HIP 95172 |
14.56 |
| 2026-06-09 00:00 |
19:22:32.71 |
-17:09:41.0 |
HIP 95172 |
13.18 |
| 2026-06-09 12:00 |
19:22:26.69 |
-17:09:48.2 |
HIP 95172 |
11.82 |
| 2026-06-10 00:00 |
19:22:20.62 |
-17:09:55.4 |
HIP 95172 |
10.46 |
| 2026-06-10 12:00 |
19:22:14.51 |
-17:10:02.9 |
HIP 95172 |
9.12 |
| 2026-06-11 00:00 |
19:22:08.36 |
-17:10:10.4 |
HIP 95172 |
7.82 |
| 2026-06-11 12:00 |
19:22:02.17 |
-17:10:18.2 |
HIP 95172 |
6.59 |
| 2026-06-12 00:00 |
19:21:55.93 |
-17:10:26.1 |
HIP 95172 |
5.47 |
| 2026-06-12 12:00 |
19:21:49.66 |
-17:10:34.1 |
HIP 95172 |
4.57 |
| 2026-06-13 00:00 |
19:21:43.35 |
-17:10:42.3 |
HIP 95172 |
4.03 |
| 2026-06-13 12:00 |
19:21:37.00 |
-17:10:50.6 |
HIP 95172 |
4.04 |
| 2026-06-14 00:00 |
19:21:30.61 |
-17:10:59.1 |
HIP 95172 |
4.58 |
| 2026-06-14 12:00 |
19:21:24.18 |
-17:11:07.7 |
HIP 95172 |
5.51 |
| 2026-06-15 00:00 |
19:21:17.72 |
-17:11:16.4 |
HIP 95172 |
6.68 |
| 2026-06-15 12:00 |
19:21:11.22 |
-17:11:25.4 |
HIP 95172 |
7.99 |
| 2026-06-16 00:00 |
19:21:04.68 |
-17:11:34.4 |
HIP 95172 |
9.38 |
| 2026-06-16 12:00 |
19:20:58.11 |
-17:11:43.6 |
HIP 95172 |
10.83 |
| 2026-06-17 00:00 |
19:20:51.51 |
-17:11:52.9 |
HIP 95063 |
10.35 |
| 2026-06-17 12:00 |
19:20:44.87 |
-17:12:02.4 |
HIP 95063 |
9.88 |
| 2026-06-18 00:00 |
19:20:38.20 |
-17:12:12.0 |
HIP 95063 |
9.65 |
| 2026-06-18 12:00 |
19:20:31.50 |
-17:12:21.7 |
HIP 95063 |
9.70 |
| 2026-06-19 00:00 |
19:20:24.77 |
-17:12:31.6 |
HIP 95063 |
10.00 |
| 2026-06-19 12:00 |
19:20:18.01 |
-17:12:41.6 |
HIP 95063 |
10.56 |
| 2026-06-20 00:00 |
19:20:11.22 |
-17:12:51.8 |
HIP 95063 |
11.32 |
| 2026-06-20 12:00 |
19:20:04.40 |
-17:13:02.0 |
HIP 95063 |
12.27 |
| 2026-06-21 00:00 |
19:19:57.55 |
-17:13:12.4 |
HIP 95063 |
13.35 |
| 2026-06-21 12:00 |
19:19:50.68 |
-17:13:23.0 |
HIP 95063 |
14.54 |
| 2026-06-22 00:00 |
19:19:43.78 |
-17:13:33.6 |
HIP 95063 |
15.83 |