메타데이터
| 항목 |
값 |
| Designation |
C/2015 B2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-05-06T13:45:33.413760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:05Z |
| Obs used |
242 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
7.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-01-19.0000000 |
| e |
1.00023551 |
| q (au) |
3.369608 |
| a (au) |
-14307.501597 |
| i (deg) |
105.088172 |
| Ω (om, deg) |
341.901291 |
| ω (w, deg) |
284.767940 |
| M (ma, deg) |
-0.000063 |
밝기
산란 + 전체 선형
$$
M_a = (11.232 + 2.360\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.232 |
| n |
2.360 |
| gf |
1.000 |
| gb |
-0.777 |
| 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 |
| 2015-01-06 |
2016-03-11 |
+0.3867 |
-0.622 |
| 2016-06-30 |
2017-09-12 |
+5.7621 |
-2.956 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
20:16:19.76 |
+39:21:33.4 |
HIP 100013 |
18.89 |
| 2026-05-12 12:00 |
20:16:17.11 |
+39:22:37.5 |
HIP 100013 |
18.47 |
| 2026-05-13 00:00 |
20:16:14.40 |
+39:23:41.4 |
HIP 100013 |
18.13 |
| 2026-05-13 12:00 |
20:16:11.64 |
+39:24:45.1 |
HIP 100013 |
17.87 |
| 2026-05-14 00:00 |
20:16:08.82 |
+39:25:48.5 |
HIP 100013 |
17.69 |
| 2026-05-14 12:00 |
20:16:05.96 |
+39:26:51.7 |
HIP 99954 |
17.08 |
| 2026-05-15 00:00 |
20:16:03.04 |
+39:27:54.6 |
HIP 99954 |
16.46 |
| 2026-05-15 12:00 |
20:16:00.07 |
+39:28:57.2 |
HIP 99954 |
15.91 |
| 2026-05-16 00:00 |
20:15:57.04 |
+39:29:59.6 |
HIP 99954 |
15.45 |
| 2026-05-16 12:00 |
20:15:53.96 |
+39:31:01.7 |
HIP 99954 |
15.08 |
| 2026-05-17 00:00 |
20:15:50.83 |
+39:32:03.5 |
HIP 99954 |
14.80 |
| 2026-05-17 12:00 |
20:15:47.65 |
+39:33:05.0 |
HIP 99954 |
14.63 |
| 2026-05-18 00:00 |
20:15:44.42 |
+39:34:06.2 |
HIP 99954 |
14.57 |
| 2026-05-18 12:00 |
20:15:41.14 |
+39:35:07.1 |
HIP 99954 |
14.61 |
| 2026-05-19 00:00 |
20:15:37.80 |
+39:36:07.7 |
HIP 99954 |
14.76 |
| 2026-05-19 12:00 |
20:15:34.41 |
+39:37:08.0 |
HIP 99954 |
15.02 |
| 2026-05-20 00:00 |
20:15:30.97 |
+39:38:08.0 |
HIP 99954 |
15.38 |
| 2026-05-20 12:00 |
20:15:27.48 |
+39:39:07.7 |
HIP 99954 |
15.83 |
| 2026-05-21 00:00 |
20:15:23.94 |
+39:40:07.1 |
HIP 99954 |
16.37 |
| 2026-05-21 12:00 |
20:15:20.35 |
+39:41:06.1 |
HIP 99954 |
16.98 |
| 2026-05-22 00:00 |
20:15:16.71 |
+39:42:04.8 |
HIP 99954 |
17.66 |
| 2026-05-22 12:00 |
20:15:13.02 |
+39:43:03.2 |
HIP 99954 |
18.41 |
| 2026-05-23 00:00 |
20:15:09.28 |
+39:44:01.3 |
HIP 99954 |
19.21 |
| 2026-05-23 12:00 |
20:15:05.49 |
+39:44:59.0 |
HIP 99954 |
20.06 |
| 2026-05-24 00:00 |
20:15:01.65 |
+39:45:56.4 |
HIP 99954 |
20.95 |
| 2026-05-24 12:00 |
20:14:57.76 |
+39:46:53.4 |
HIP 99954 |
21.88 |
| 2026-05-25 00:00 |
20:14:53.83 |
+39:47:50.1 |
HIP 99954 |
22.85 |
| 2026-05-25 12:00 |
20:14:49.84 |
+39:48:46.4 |
HIP 99954 |
23.84 |
| 2026-05-26 00:00 |
20:14:45.81 |
+39:49:42.3 |
HIP 99954 |
24.86 |
| 2026-05-26 12:00 |
20:14:41.73 |
+39:50:37.9 |
HIP 99954 |
25.90 |
| 2026-05-27 00:00 |
20:14:37.60 |
+39:51:33.2 |
HIP 99571 |
26.62 |
| 2026-05-27 12:00 |
20:14:33.42 |
+39:52:28.0 |
HIP 99571 |
26.14 |
| 2026-05-28 00:00 |
20:14:29.20 |
+39:53:22.5 |
HIP 99571 |
25.69 |
| 2026-05-28 12:00 |
20:14:24.93 |
+39:54:16.7 |
HIP 99571 |
25.28 |
| 2026-05-29 00:00 |
20:14:20.61 |
+39:55:10.4 |
HIP 99760 |
24.60 |
| 2026-05-29 12:00 |
20:14:16.24 |
+39:56:03.8 |
HIP 99760 |
23.76 |
| 2026-05-30 00:00 |
20:14:11.83 |
+39:56:56.7 |
HIP 99760 |
22.97 |
| 2026-05-30 12:00 |
20:14:07.38 |
+39:57:49.3 |
HIP 99760 |
22.22 |
| 2026-05-31 00:00 |
20:14:02.88 |
+39:58:41.5 |
HIP 99760 |
21.52 |
| 2026-05-31 12:00 |
20:13:58.33 |
+39:59:33.3 |
HIP 99760 |
20.88 |
| 2026-06-01 00:00 |
20:13:53.73 |
+40:00:24.7 |
HIP 99760 |
20.30 |
| 2026-06-01 12:00 |
20:13:49.10 |
+40:01:15.7 |
HIP 99760 |
19.79 |
| 2026-06-02 00:00 |
20:13:44.41 |
+40:02:06.2 |
HIP 99760 |
19.36 |