메타데이터
| 항목 |
값 |
| Designation |
C/2015 T2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2017-05-20T14:34:53.685120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:15Z |
| Obs used |
214 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-12-20.0000000 |
| e |
1.00038904 |
| q (au) |
6.935284 |
| a (au) |
-17826.537165 |
| i (deg) |
124.543195 |
| Ω (om, deg) |
51.058229 |
| ω (w, deg) |
30.773308 |
| M (ma, deg) |
-0.000063 |
밝기
산란 + 전체 선형
$$
M_a = (1.916 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
1.916 |
| n |
6.000 |
| gf |
0.978 |
| gb |
-0.997 |
| k |
1.000 |
| δ90 |
9.999 |
| 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 |
| 2015-10-09 |
2017-01-24 |
+9.5885 |
-8.057 |
| 2017-08-17 |
2019-09-26 |
-6.8397 |
+5.422 |
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 |
17:21:31.97 |
+12:00:33.0 |
HIP 84902 |
14.01 |
| 2026-06-01 12:00 |
17:21:24.89 |
+12:00:35.7 |
HIP 84902 |
13.31 |
| 2026-06-02 00:00 |
17:21:17.79 |
+12:00:38.0 |
HIP 84902 |
12.81 |
| 2026-06-02 12:00 |
17:21:10.69 |
+12:00:39.9 |
HIP 84902 |
12.53 |
| 2026-06-03 00:00 |
17:21:03.58 |
+12:00:41.2 |
HIP 84902 |
12.47 |
| 2026-06-03 12:00 |
17:20:56.46 |
+12:00:42.2 |
HIP 84902 |
12.65 |
| 2026-06-04 00:00 |
17:20:49.34 |
+12:00:42.6 |
HIP 84902 |
13.05 |
| 2026-06-04 12:00 |
17:20:42.21 |
+12:00:42.7 |
HIP 84902 |
13.66 |
| 2026-06-05 00:00 |
17:20:35.07 |
+12:00:42.3 |
HIP 84902 |
14.45 |
| 2026-06-05 12:00 |
17:20:27.93 |
+12:00:41.4 |
HIP 84902 |
15.39 |
| 2026-06-06 00:00 |
17:20:20.78 |
+12:00:40.1 |
HIP 84902 |
16.46 |
| 2026-06-06 12:00 |
17:20:13.63 |
+12:00:38.3 |
HIP 84902 |
17.63 |
| 2026-06-07 00:00 |
17:20:06.48 |
+12:00:36.1 |
HIP 84902 |
18.89 |
| 2026-06-07 12:00 |
17:19:59.32 |
+12:00:33.4 |
HIP 84902 |
20.22 |
| 2026-06-08 00:00 |
17:19:52.16 |
+12:00:30.2 |
HIP 84902 |
21.61 |
| 2026-06-08 12:00 |
17:19:45.00 |
+12:00:26.6 |
HIP 84902 |
23.04 |
| 2026-06-09 00:00 |
17:19:37.83 |
+12:00:22.6 |
HIP 84723 |
23.60 |
| 2026-06-09 12:00 |
17:19:30.66 |
+12:00:18.1 |
HIP 84723 |
23.11 |
| 2026-06-10 00:00 |
17:19:23.49 |
+12:00:13.1 |
HIP 84723 |
22.75 |
| 2026-06-10 12:00 |
17:19:16.33 |
+12:00:07.6 |
HIP 84723 |
22.54 |
| 2026-06-11 00:00 |
17:19:09.16 |
+12:00:01.8 |
HIP 84723 |
22.46 |
| 2026-06-11 12:00 |
17:19:01.99 |
+11:59:55.4 |
HIP 84723 |
22.53 |
| 2026-06-12 00:00 |
17:18:54.83 |
+11:59:48.6 |
HIP 84723 |
22.75 |
| 2026-06-12 12:00 |
17:18:47.66 |
+11:59:41.3 |
HIP 84723 |
23.10 |
| 2026-06-13 00:00 |
17:18:40.50 |
+11:59:33.6 |
HIP 84723 |
23.59 |
| 2026-06-13 12:00 |
17:18:33.34 |
+11:59:25.4 |
HIP 84723 |
24.20 |
| 2026-06-14 00:00 |
17:18:26.19 |
+11:59:16.7 |
HIP 84723 |
24.93 |
| 2026-06-14 12:00 |
17:18:19.04 |
+11:59:07.6 |
HIP 84723 |
25.76 |
| 2026-06-15 00:00 |
17:18:11.89 |
+11:58:58.0 |
HIP 84723 |
26.69 |
| 2026-06-15 12:00 |
17:18:04.75 |
+11:58:48.0 |
HIP 84723 |
27.70 |
| 2026-06-16 00:00 |
17:17:57.62 |
+11:58:37.5 |
HIP 84723 |
28.79 |
| 2026-06-16 12:00 |
17:17:50.49 |
+11:58:26.5 |
HIP 84723 |
29.95 |
| 2026-06-17 00:00 |
17:17:43.37 |
+11:58:15.1 |
HIP 84723 |
31.17 |
| 2026-06-17 12:00 |
17:17:36.25 |
+11:58:03.2 |
HIP 84723 |
32.44 |
| 2026-06-18 00:00 |
17:17:29.15 |
+11:57:50.8 |
HIP 84428 |
32.95 |
| 2026-06-18 12:00 |
17:17:22.05 |
+11:57:38.0 |
HIP 84428 |
31.68 |
| 2026-06-19 00:00 |
17:17:14.96 |
+11:57:24.7 |
HIP 84428 |
30.47 |
| 2026-06-19 12:00 |
17:17:07.88 |
+11:57:11.0 |
HIP 84428 |
29.31 |
| 2026-06-20 00:00 |
17:17:00.81 |
+11:56:56.8 |
HIP 84428 |
28.22 |
| 2026-06-20 12:00 |
17:16:53.75 |
+11:56:42.2 |
HIP 84428 |
27.21 |
| 2026-06-21 00:00 |
17:16:46.71 |
+11:56:27.1 |
HIP 84428 |
26.28 |
| 2026-06-21 12:00 |
17:16:39.67 |
+11:56:11.6 |
HIP 84428 |
25.44 |
| 2026-06-22 00:00 |
17:16:32.65 |
+11:55:55.6 |
HIP 84428 |
24.71 |