메타데이터
| 항목 |
값 |
| Designation |
P/2012 B1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-07-23T03:26:57.641280Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:13:35Z |
| Obs used |
1189 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
12.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-02-05.0000000 |
| e |
0.41050358 |
| q (au) |
3.825153 |
| a (au) |
6.488848 |
| i (deg) |
7.627784 |
| Ω (om, deg) |
36.194183 |
| ω (w, deg) |
162.183007 |
| M (ma, deg) |
349.973869 |
밝기
산란 + 전체 선형
$$
M_a = (3.981 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
3.981 |
| 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 |
| 2011-12-31 |
2013-07-20 |
+5.5281 |
-3.279 |
| 2013-08-25 |
2015-06-10 |
+9.6303 |
-6.962 |
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 |
04:23:35.02 |
+25:27:43.0 |
HIP 20604 |
16.58 |
| 2026-05-12 12:00 |
04:23:54.81 |
+25:28:30.3 |
HIP 20604 |
12.45 |
| 2026-05-13 00:00 |
04:24:14.64 |
+25:29:17.7 |
HIP 20604 |
8.72 |
| 2026-05-13 12:00 |
04:24:34.50 |
+25:30:05.0 |
HIP 20604 |
6.21 |
| 2026-05-14 00:00 |
04:24:54.40 |
+25:30:52.4 |
HIP 20604 |
6.52 |
| 2026-05-14 12:00 |
04:25:14.33 |
+25:31:39.8 |
HIP 20604 |
9.39 |
| 2026-05-15 00:00 |
04:25:34.30 |
+25:32:27.3 |
HIP 20604 |
13.25 |
| 2026-05-15 12:00 |
04:25:54.29 |
+25:33:14.7 |
HIP 20626 |
15.27 |
| 2026-05-16 00:00 |
04:26:14.33 |
+25:34:02.1 |
HIP 20777 |
13.74 |
| 2026-05-16 12:00 |
04:26:34.39 |
+25:34:49.6 |
HIP 20777 |
9.90 |
| 2026-05-17 00:00 |
04:26:54.48 |
+25:35:37.0 |
HIP 20777 |
7.01 |
| 2026-05-17 12:00 |
04:27:14.60 |
+25:36:24.5 |
HIP 20777 |
6.54 |
| 2026-05-18 00:00 |
04:27:34.76 |
+25:37:11.9 |
HIP 20777 |
8.87 |
| 2026-05-18 12:00 |
04:27:54.94 |
+25:37:59.3 |
HIP 20777 |
12.54 |
| 2026-05-19 00:00 |
04:28:15.15 |
+25:38:46.8 |
HIP 20777 |
16.70 |
| 2026-05-19 12:00 |
04:28:35.38 |
+25:39:34.2 |
HIP 20777 |
21.05 |
| 2026-05-20 00:00 |
04:28:55.65 |
+25:40:21.6 |
HIP 20777 |
25.51 |
| 2026-05-20 12:00 |
04:29:15.93 |
+25:41:09.1 |
HIP 20777 |
30.02 |
| 2026-05-21 00:00 |
04:29:36.25 |
+25:41:56.5 |
HIP 21134 |
32.04 |
| 2026-05-21 12:00 |
04:29:56.59 |
+25:42:43.9 |
HIP 21134 |
27.48 |
| 2026-05-22 00:00 |
04:30:16.95 |
+25:43:31.2 |
HIP 21134 |
22.96 |
| 2026-05-22 12:00 |
04:30:37.33 |
+25:44:18.6 |
HIP 21134 |
18.50 |
| 2026-05-23 00:00 |
04:30:57.74 |
+25:45:05.9 |
HIP 21134 |
14.17 |
| 2026-05-23 12:00 |
04:31:18.16 |
+25:45:53.2 |
HIP 21134 |
10.12 |
| 2026-05-24 00:00 |
04:31:38.61 |
+25:46:40.5 |
HIP 21134 |
6.90 |
| 2026-05-24 12:00 |
04:31:59.08 |
+25:47:27.8 |
HIP 21134 |
6.04 |
| 2026-05-25 00:00 |
04:32:19.57 |
+25:48:15.0 |
HIP 21134 |
8.31 |
| 2026-05-25 12:00 |
04:32:40.08 |
+25:49:02.3 |
HIP 21134 |
12.06 |
| 2026-05-26 00:00 |
04:33:00.61 |
+25:49:49.4 |
HIP 21134 |
16.30 |
| 2026-05-26 12:00 |
04:33:21.15 |
+25:50:36.6 |
HIP 21134 |
20.74 |
| 2026-05-27 00:00 |
04:33:41.71 |
+25:51:23.7 |
HIP 21134 |
25.27 |
| 2026-05-27 12:00 |
04:34:02.29 |
+25:52:10.8 |
HIP 21134 |
29.85 |
| 2026-05-28 00:00 |
04:34:22.88 |
+25:52:57.9 |
HIP 21134 |
34.47 |
| 2026-05-28 12:00 |
04:34:43.50 |
+25:53:44.9 |
HIP 21532 |
37.63 |
| 2026-05-29 00:00 |
04:35:04.12 |
+25:54:31.9 |
HIP 21532 |
33.43 |
| 2026-05-29 12:00 |
04:35:24.76 |
+25:55:18.8 |
HIP 21532 |
29.38 |
| 2026-05-30 00:00 |
04:35:45.41 |
+25:56:05.7 |
HIP 21532 |
25.55 |
| 2026-05-30 12:00 |
04:36:06.08 |
+25:56:52.6 |
HIP 21532 |
22.07 |
| 2026-05-31 00:00 |
04:36:26.76 |
+25:57:39.4 |
HIP 21532 |
19.12 |
| 2026-05-31 12:00 |
04:36:47.45 |
+25:58:26.1 |
HIP 21532 |
16.98 |
| 2026-06-01 00:00 |
04:37:08.16 |
+25:59:12.9 |
HIP 21532 |
16.00 |
| 2026-06-01 12:00 |
04:37:28.87 |
+25:59:59.6 |
HIP 21532 |
16.37 |
| 2026-06-02 00:00 |
04:37:49.60 |
+26:00:46.2 |
HIP 21532 |
18.02 |