메타데이터
| 항목 |
값 |
| Designation |
C/2014 Y1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-01-17T15:41:20.803200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:05Z |
| Obs used |
305 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-04-19.0000000 |
| e |
1.00210330 |
| q (au) |
2.240976 |
| a (au) |
-1065.459229 |
| i (deg) |
14.921289 |
| Ω (om, deg) |
19.516424 |
| ω (w, deg) |
182.265969 |
| M (ma, deg) |
-0.007755 |
밝기
산란 + 전체 선형
$$
M_a = (15.038 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.038 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.719 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2014-11-17 |
2015-04-22 |
+9.9842 |
-6.474 |
| 2015-04-22 |
2016-01-10 |
-0.5262 |
-0.311 |
| 2016-01-19 |
2016-05-29 |
+16.0710 |
-4.516 |
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 |
23:35:26.18 |
-11:22:03.7 |
HIP 116398 |
13.06 |
| 2026-06-01 12:00 |
23:35:27.49 |
-11:22:04.4 |
HIP 116398 |
13.14 |
| 2026-06-02 00:00 |
23:35:28.76 |
-11:22:05.3 |
HIP 116398 |
13.22 |
| 2026-06-02 12:00 |
23:35:29.99 |
-11:22:06.5 |
HIP 116398 |
13.30 |
| 2026-06-03 00:00 |
23:35:31.19 |
-11:22:07.9 |
HIP 116398 |
13.38 |
| 2026-06-03 12:00 |
23:35:32.35 |
-11:22:09.6 |
HIP 116398 |
13.45 |
| 2026-06-04 00:00 |
23:35:33.48 |
-11:22:11.5 |
HIP 116398 |
13.53 |
| 2026-06-04 12:00 |
23:35:34.57 |
-11:22:13.7 |
HIP 116398 |
13.60 |
| 2026-06-05 00:00 |
23:35:35.62 |
-11:22:16.1 |
HIP 116398 |
13.67 |
| 2026-06-05 12:00 |
23:35:36.64 |
-11:22:18.7 |
HIP 116398 |
13.74 |
| 2026-06-06 00:00 |
23:35:37.62 |
-11:22:21.6 |
HIP 116398 |
13.80 |
| 2026-06-06 12:00 |
23:35:38.56 |
-11:22:24.8 |
HIP 116398 |
13.86 |
| 2026-06-07 00:00 |
23:35:39.47 |
-11:22:28.2 |
HIP 116398 |
13.92 |
| 2026-06-07 12:00 |
23:35:40.35 |
-11:22:31.8 |
HIP 116398 |
13.97 |
| 2026-06-08 00:00 |
23:35:41.18 |
-11:22:35.7 |
HIP 116398 |
14.02 |
| 2026-06-08 12:00 |
23:35:41.98 |
-11:22:39.8 |
HIP 116398 |
14.06 |
| 2026-06-09 00:00 |
23:35:42.74 |
-11:22:44.2 |
HIP 116398 |
14.10 |
| 2026-06-09 12:00 |
23:35:43.47 |
-11:22:48.8 |
HIP 116398 |
14.13 |
| 2026-06-10 00:00 |
23:35:44.16 |
-11:22:53.6 |
HIP 116398 |
14.15 |
| 2026-06-10 12:00 |
23:35:44.81 |
-11:22:58.7 |
HIP 116398 |
14.17 |
| 2026-06-11 00:00 |
23:35:45.42 |
-11:23:04.1 |
HIP 116398 |
14.19 |
| 2026-06-11 12:00 |
23:35:46.00 |
-11:23:09.7 |
HIP 116398 |
14.19 |
| 2026-06-12 00:00 |
23:35:46.54 |
-11:23:15.5 |
HIP 116398 |
14.19 |
| 2026-06-12 12:00 |
23:35:47.04 |
-11:23:21.6 |
HIP 116398 |
14.18 |
| 2026-06-13 00:00 |
23:35:47.51 |
-11:23:27.9 |
HIP 116398 |
14.17 |
| 2026-06-13 12:00 |
23:35:47.94 |
-11:23:34.5 |
HIP 116398 |
14.15 |
| 2026-06-14 00:00 |
23:35:48.33 |
-11:23:41.3 |
HIP 116398 |
14.12 |
| 2026-06-14 12:00 |
23:35:48.68 |
-11:23:48.3 |
HIP 116398 |
14.08 |
| 2026-06-15 00:00 |
23:35:49.00 |
-11:23:55.6 |
HIP 116398 |
14.04 |
| 2026-06-15 12:00 |
23:35:49.28 |
-11:24:03.1 |
HIP 116398 |
13.99 |
| 2026-06-16 00:00 |
23:35:49.52 |
-11:24:10.9 |
HIP 116398 |
13.93 |
| 2026-06-16 12:00 |
23:35:49.72 |
-11:24:18.8 |
HIP 116398 |
13.86 |
| 2026-06-17 00:00 |
23:35:49.89 |
-11:24:27.1 |
HIP 116398 |
13.79 |
| 2026-06-17 12:00 |
23:35:50.01 |
-11:24:35.5 |
HIP 116398 |
13.71 |
| 2026-06-18 00:00 |
23:35:50.11 |
-11:24:44.3 |
HIP 116398 |
13.62 |
| 2026-06-18 12:00 |
23:35:50.16 |
-11:24:53.2 |
HIP 116398 |
13.52 |
| 2026-06-19 00:00 |
23:35:50.17 |
-11:25:02.4 |
HIP 116398 |
13.41 |
| 2026-06-19 12:00 |
23:35:50.15 |
-11:25:11.8 |
HIP 116398 |
13.29 |
| 2026-06-20 00:00 |
23:35:50.09 |
-11:25:21.4 |
HIP 116398 |
13.17 |
| 2026-06-20 12:00 |
23:35:50.00 |
-11:25:31.3 |
HIP 116398 |
13.04 |
| 2026-06-21 00:00 |
23:35:49.86 |
-11:25:41.4 |
HIP 116398 |
12.90 |
| 2026-06-21 12:00 |
23:35:49.69 |
-11:25:51.7 |
HIP 116398 |
12.75 |
| 2026-06-22 00:00 |
23:35:49.48 |
-11:26:02.2 |
HIP 116398 |
12.59 |