메타데이터
| 항목 |
값 |
| Designation |
262P/McNaught-Russell |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-12-04T11:01:48.411840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:09Z |
| Obs used |
1339 |
| NEO |
Yes |
| M1 |
14.700 |
| K1 |
6.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-12-24.0000000 |
| e |
0.81540093 |
| q (au) |
1.280260 |
| a (au) |
6.935353 |
| i (deg) |
29.079418 |
| Ω (om, deg) |
218.014306 |
| ω (w, deg) |
171.169762 |
| M (ma, deg) |
341.303779 |
밝기
산란 + 전체 선형
$$
M_a = (14.572 + 3.736\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.572 |
| n |
3.736 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
| 2012-05-29 |
2012-09-20 |
-8.5325 |
+2.913 |
| 2012-09-20 |
2012-12-04 |
+11.6281 |
-1.021 |
| 2012-12-05 |
2013-04-22 |
-6.0909 |
-0.588 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
14:38:42.66 |
-10:27:00.2 |
HIP 71632 |
7.65 |
| 2026-07-29 12:00 |
14:38:43.06 |
-10:27:03.6 |
HIP 71632 |
7.55 |
| 2026-07-30 00:00 |
14:38:43.54 |
-10:27:07.5 |
HIP 71632 |
7.43 |
| 2026-07-30 12:00 |
14:38:44.13 |
-10:27:11.8 |
HIP 71632 |
7.29 |
| 2026-07-31 00:00 |
14:38:44.80 |
-10:27:16.6 |
HIP 71632 |
7.13 |
| 2026-07-31 12:00 |
14:38:45.57 |
-10:27:21.8 |
HIP 71632 |
6.96 |
| 2026-08-01 00:00 |
14:38:46.43 |
-10:27:27.4 |
HIP 71632 |
6.77 |
| 2026-08-01 12:00 |
14:38:47.38 |
-10:27:33.5 |
HIP 71632 |
6.56 |
| 2026-08-02 00:00 |
14:38:48.43 |
-10:27:40.1 |
HIP 71632 |
6.35 |
| 2026-08-02 12:00 |
14:38:49.57 |
-10:27:47.1 |
HIP 71632 |
6.11 |
| 2026-08-03 00:00 |
14:38:50.81 |
-10:27:54.5 |
HIP 71632 |
5.88 |
| 2026-08-03 12:00 |
14:38:52.13 |
-10:28:02.4 |
HIP 71632 |
5.63 |
| 2026-08-04 00:00 |
14:38:53.55 |
-10:28:10.7 |
HIP 71632 |
5.38 |
| 2026-08-04 12:00 |
14:38:55.06 |
-10:28:19.5 |
HIP 71632 |
5.14 |
| 2026-08-05 00:00 |
14:38:56.67 |
-10:28:28.7 |
HIP 71632 |
4.90 |
| 2026-08-05 12:00 |
14:38:58.36 |
-10:28:38.3 |
HIP 71632 |
4.68 |
| 2026-08-06 00:00 |
14:39:00.15 |
-10:28:48.4 |
HIP 71632 |
4.48 |
| 2026-08-06 12:00 |
14:39:02.03 |
-10:28:58.8 |
HIP 71632 |
4.33 |
| 2026-08-07 00:00 |
14:39:04.01 |
-10:29:09.8 |
HIP 71632 |
4.22 |
| 2026-08-07 12:00 |
14:39:06.07 |
-10:29:21.1 |
HIP 71632 |
4.17 |
| 2026-08-08 00:00 |
14:39:08.23 |
-10:29:32.9 |
HIP 71632 |
4.20 |
| 2026-08-08 12:00 |
14:39:10.48 |
-10:29:45.1 |
HIP 71632 |
4.32 |
| 2026-08-09 00:00 |
14:39:12.82 |
-10:29:57.7 |
HIP 71632 |
4.51 |
| 2026-08-09 12:00 |
14:39:15.25 |
-10:30:10.7 |
HIP 71632 |
4.79 |
| 2026-08-10 00:00 |
14:39:17.77 |
-10:30:24.2 |
HIP 71632 |
5.15 |
| 2026-08-10 12:00 |
14:39:20.39 |
-10:30:38.1 |
HIP 71632 |
5.58 |
| 2026-08-11 00:00 |
14:39:23.09 |
-10:30:52.4 |
HIP 71632 |
6.07 |
| 2026-08-11 12:00 |
14:39:25.89 |
-10:31:07.1 |
HIP 71632 |
6.63 |
| 2026-08-12 00:00 |
14:39:28.77 |
-10:31:22.2 |
HIP 71632 |
7.23 |
| 2026-08-12 12:00 |
14:39:31.75 |
-10:31:37.7 |
HIP 71632 |
7.88 |
| 2026-08-13 00:00 |
14:39:34.81 |
-10:31:53.6 |
HIP 71632 |
8.57 |
| 2026-08-13 12:00 |
14:39:37.97 |
-10:32:09.9 |
HIP 71632 |
9.30 |
| 2026-08-14 00:00 |
14:39:41.22 |
-10:32:26.7 |
HIP 71632 |
10.06 |
| 2026-08-14 12:00 |
14:39:44.55 |
-10:32:43.8 |
HIP 71632 |
10.86 |
| 2026-08-15 00:00 |
14:39:47.97 |
-10:33:01.3 |
HIP 71632 |
11.69 |
| 2026-08-15 12:00 |
14:39:51.49 |
-10:33:19.2 |
HIP 71632 |
12.55 |
| 2026-08-16 00:00 |
14:39:55.09 |
-10:33:37.5 |
HIP 71632 |
13.44 |
| 2026-08-16 12:00 |
14:39:58.77 |
-10:33:56.1 |
HIP 71632 |
14.36 |
| 2026-08-17 00:00 |
14:40:02.55 |
-10:34:15.2 |
HIP 71632 |
15.30 |
| 2026-08-17 12:00 |
14:40:06.41 |
-10:34:34.6 |
HIP 71781 |
16.02 |
| 2026-08-18 00:00 |
14:40:10.36 |
-10:34:54.4 |
HIP 71781 |
15.04 |
| 2026-08-18 12:00 |
14:40:14.40 |
-10:35:14.6 |
HIP 71781 |
14.03 |
| 2026-08-19 00:00 |
14:40:18.52 |
-10:35:35.2 |
HIP 71781 |
13.02 |